The Atlas V rocket that will power NASA’s new Juno science probe to Jupiter was rolled out to the launch pad at Space Launch Complex 41 and now sits poised for blastoff on Friday, Aug. 5 at 15:34 UT (11:34 a.m. EDT) from Cape Canaveral Air Force Station in Florida.
The Atlas V booster rocket was pushed out of its protective hanger, known as the Vertical Integration Facility, and towards Pad 41 this morning starting at 8:01 a.m. and took about 40 minutes to reach its destination.
Weather forecasters continues to call for a 70 percent chance of favorable conditions at launch time, but the approach of Tropical Storm Emily could throw a wrench in NASA’s plans depending on the track following by the storm over the remaining prelaunch period.
According to continuing weather updates, Emily is dissipating.
Managers approved Juno for flight at this morning’s Launch Readiness Review. The 4 ton Juno spacecraft will embark on a five year trek to Jupiter, our solar system’s largest planet and seek to understand the ingredients necessary for planetary formations.
Juno is perched inside a 5 meter diameter payload fairing and mated to the most powerful version of the Atlas V rocket – an Atlas 551 – with 2.4 million pounds of liftoff thrust. The 20 story tall Atlas 551 uses a standard Atlas booster with five solid rocket boosters in the first stage and a single engine Centaur in the second stage.
The launch window extends for 69 minutes.
The Atlas V is built by United Launch Alliance (ULA).
Juno will orbit Jupiter 33 times and search for the existence of a solid planetary core, map Jupiter’s intense magnetic field, measure the amount of water and ammonia in the deep atmosphere, and observe the planet’s auroras. Each orbit lasts 11 days
The spacecraft will provide the first detailed glimpse of Jupiter’s poles via a specially designed camera. The elliptical orbit will allow Juno to avoid most of Jupiter’s harsh radiation regions that can severely damage the spacecraft systems.
See my photo album from the launch pad published here.
In a news conference today, NASA announced discoveries that provide additional evidence of seasonal water flows on Mars. Using data collected by the Mars Reconnaissance Orbiter, the MRO team presented images of dark lines that form on slopes during the martian spring/summer and fade in winter.
During the news conference, HIRISE principal investigator Alfred McEwen (University of Arizona), discussed that these “finger-like” features were found in Mars’ mid-southern latitudes. “The best explanation for these observations so far is the flow of briny water,” he said.
McEwen based his explanation on several key facts: First, salt lowers the freezing point of water (“plain” water would simply stay frozen on Mars) Secondly, the temperature on Mars during these flows ranges from -23 to +27 degrees Celsius, which rules out CO2. While there is significant evidence of flowing water, the team did state that there is no direct detection of water since it evaporates quickly on Mars.
Regarding the dark color of the flows, McEwen added, “The flows are not dark because of being wet, they are dark for some other reason.” McEwen also mentioned that researchers will need to re-create Mars-like conditions in the lab to better understand these flows, stating, “It’s a mystery now, but I think it’s a solvable mystery with further observations and laboratory experiments.”
MRO Project Scientist Richard Zurek (JPL) offered his thoughts as well. “These dark lineations are different from other types of features on Martian slopes,” he said, “and repeated observations show they extend ever farther downhill with time during the warm season.”
What also proves intriguing to the team is that while gullies are very abundant on colder slopes that face the poles, the dark flows discussed in today’s news conference are found on warmer slopes which face the equator.
During the conference, Philip Christensen (Arizona State University) presented a map showing concentrations of “salts” in the same locations that the dark, “finger-like” flows were found.
McEwen reiterated during the Q&A session that the Compact Reconnaissance Imaging Spectrometer for Mars (CRISM), hasn’t detected any signs of water and that laboratory simulations will be necessary to gain a better understanding of these features – basically the team is seeing signs of flowing water, but not the water itself.
If you’d like to learn more about the Mars Reconnaissance Orbiter and today’s announcement, you can visit: http://www.nasa.gov/mro
Following the majestic predawn touchdown of Space Shuttle Atlantis at the Kennedy Space Center (KSC) to close out the Space Shuttle Era, the final crew of Atlantis, NASA Administrator Charles Bolden and KSC Director Bob Cabana thanked the Space Shuttle workforce for their dedication and hard work at an employee appreciation event held outside the processing hangers where the orbiters were prepared for the 135 shuttle missions flown by NASA over more than thirty years.
The four person crew of Atlantis on the STS-135 mission flew a special commemorative banner millions of miles to the International Space Station and back in honor of the thousands of workers who processed, launched and landed America’s five space shuttles. They unfurled the banner at the employee event at KSC in tribute to the shuttle workers.
“It’s great to be here in sunny Florida,” said STS 135 Commander Chris Ferguson. “Mike Leinbach [ the Space Shuttle Launch Director] said there was no way he’d let us land in California.”
“We want to express our gratitude on behalf of the astronaut office for everything you have done here at KSC, the safety you have built into the vehicles, the meticulous care that you take of the orbiter. As soon as we got on orbit, I was absolutely amazed that everything in Atlantis works so well. Everything looks beautiful on the inside.”
“I hope you all believe that every time we go, we take a little bit of every one of you with us,” Ferguson emphasized.
Atlantis was parked at the event as a backdrop for photo opportunities with the thousands of shuttle workers in attendance – along with over a hundred journalists including the Universe Today team of Alan Walters and Ken Kremer.
“Like Chris said, our one landing option was getting back to Florida and you all rather than anywhere else. It felt like being home again. Thank you for everything you have all done over the last 30+ years,” said Doug Hurley.
“We treated Atlantis with the utmost respect because we see firsthand how you process this vehicle and it is your baby,” said Rex Waldheim. “It is clean and well cared for. We did that for you because you all did such a great job preparing it for us.”
“You are such a special work force,” added Sandy Magnus. “There is no workforce like the space program workforce anywhere in the world. The pride, care, dedication and passion you take in your work is what makes it possible to have these very challenging missions and to succeed. You have to do everything right all of the time. And you DO. And you make it look easy!! Congratulations!”
The STS-135 crew then unfurled the colorful banner taken to the ISS aboard Atlantis to commemorate NASA’s Space Shuttle Era.
“We took this banner with us to space and this is our way of telling you that you guys rock ! We will present this to Mike Leinbach and Bob Cabana as just a small token of our appreciation for all the work you’ve done for us. Thank you for such a wonderful vehicle,” Ferguson summed up.
The crew then waved good bye to the thousands of shuttle workers, posed with Atlantis one last time and departed with their families for a homecoming celebration at their training base at the Johnson Space Center in Houston, Texas.
Atlantis was then towed a few hundred yards (meters) and came to rest inside the Orbiter Processing Facility to conclude her final spaceflight journey as the last of NASA’s flight worthy Space Shuttle Orbiters. She has began decommissioning activities due to last several months to prepare for her future retirement home at the Kennedy Space Center Visitor Complex (KSCVC) just a few miles (km) away.
Atlantis permanent new abode at KSCVC is set to open in 2013 where she will be genuinely displayed bearing scorch marks from reentry and as though “In Flight” with payload bays doors wide open for the general public to experience reality up close.
For some 1500 shuttle workers, the day’s proceedings were both joyous and bittersweet – as their last full day of employment and last chance to bask in the glow of the triumphant conclusion of the Shuttle Era.
NASA has just released the first full frame images of Vesta– and they are thrilling! The new images unveil Vesta as a real world with extraordinarily varied surface details and in crispy clear high resolution for the first time in human history.
Vesta appears totally alien and completely unique. “It is one of the last major uncharted worlds in our solar system,” says Dr. Marc Rayman, Dawn’s chief engineer and mission manager at NASA’s Jet Propulsion Laboratory in Pasadena, Calif. “Now that we are in orbit we can see that it’s a unique and fascinating place.”
“We have been calling Vesta the smallest terrestrial planet,” said Chris Russell, Dawn’s principal investigator at the UCLA. “The latest imagery provides much justification for our expectations. They show that a variety of processes were once at work on the surface of Vesta and provide extensive evidence for Vesta’s planetary aspirations.”
The newly published image (shown above) was taken at a distance of 3,200 miles (5,200 kilometers) by Dawn’s framing camera as the probe continues spiraling down to her initial science survey orbit of some 1,700 miles (2,700 km) altitude. The new images show the entire globe all the way since the giant asteroid turns on its axis once every five hours and 20 minutes.
Vesta and its new moon – Dawn – are approximately 114 million miles (184 million kilometers) distant away from Earth.
“The new observations of Vesta are an inspirational reminder of the wonders unveiled through ongoing exploration of our solar system,” said Jim Green, planetary division director at NASA Headquarters in Washington.
Dawn was launched atop a Delta II Heavy booster rocket in September 2007, took a gravity assist as it flew past Mars and has been thrusting with exotic ion propulsion for about 70 percent of the time ever since.
Dawn will spend 1 year collecting science data in orbit around Vesta before heading off to the Dwarf Planet Ceres.
The science team has just completed their press briefing. Watch for my more detailed report upcoming soon.
And don’t forget JUNO launches on Aug 5 – It’s an exciting week for NASA Space Science and I’ll be reporting on the Jupiter orbiter’s blastoff and more – as Opportunity closes in on Spirit Point !
NASA’s groundbreaking interplanetary science is all inter connected – because Vesta and Ceres failed to form into full-fledged planets thanks to the disruptive influence of Jupiter.
Space Shuttle Atlantis closed out NASA’s Space Shuttle Era with a safe touchdown on July 21, 2011 at the Kennedy Space Center in Florida at the conclusion of the STS-135 mission, the 135th and final shuttle mission.
I was extremely fortunate to be an eyewitness to history and one of the lucky few journalists permitted by NASA to follow along as Atlantis took her historic final journey back from wheels stop at Runway 15 at the Shuttle Landing Facility as a flight worthy orbiter.
A convoy of 25 specialized vehicles safe each orbiter after landing. Some four hours later, Atlantis was towed off the runway with a diesel powered tractor for about 2 miles along the tow way leading to the Orbiter Processing Facility which lies adjacent to the Vehicle Assembly Building (VAB) at KSC.
The STS-135 crew consisted of Shuttle Commander Chris Ferguson, Pilot Doug Hurley and Mission Specialists Sandra Magnus and Rex Walheim.
Check out my Towback Photo Album below, and prior album from wheels stop at the shuttle runway earlier in the day, here:
At Wheels Stop with Atlantis ! Here ended the Shuttle Era
A few short hours after the touchdown of Space Shuttle Atlantis closed out NASA’s Space Shuttle Era, myself and a small group of extremely lucky journalists and photographers were invited by NASA to journey to ‘Wheels Stop’ – Runway 15 at the Shuttle Landing Facility at the Kennedy Space Center for a thrilling and once in a lifetime eyewitness experience to the exact spot where Atlantis rolled to a stop.
After 30 years and 135 missions, the landing of the Final Flight of Space Shuttle Atlantis on July 21, 2011 at 5:57 a.m. concluded America’s Space Shuttle Program. The Grand Finale was commemorated with banners, quilts and celebrations at Runway 15.
The STS-135 crew comprised of Shuttle Commander Chris Ferguson, Pilot Doug Hurley and Mission Specialists Sandra Magnus and Rex Walheim.
It’s truly an honor and a privilege to be granted this extremely rare and magnificent opportunity to witness history first hand by the folks at NASA and the Kennedy Space Center – and share this with the public. Thank you !
See my Atlantis ‘Wheels Stop’ photo album below and more upcoming from Universe Today colleague Alan Walters
Barely discernable in the pre-dawn twilight and appearing as an eerie, ghost like figure, Space Shuttle Atlantis and her four person crew swiftly glided to a triumphant landing at the Kennedy Space Center that closed out NASA’s three decade long Space Shuttle Era – in the wink of an eye it was all over.
Atlantis touched down almost invisibly on Runway 15 at the Shuttle Landing Facility at 5:57 a.m. EDT and rolled to a stop moments later to conclude the history making 13 day flight to the International Space Station and back. During the STS-135 mission Atlantis orbited the Earth 200 times and journeyed 5,284,862 miles.
The all veteran crew of space flyers comprised of Shuttle Commander Chris Ferguson, Pilot Doug Hurley and Mission Specialists Sandra Magnus and Rex Walheim.
The finality of it all was at once thoroughly unbelievable that the shuttles would never fly again but utterly definitive at ‘wheel stop’ that we had witnessed the end of a historic and magnificent Era in human spaceflight.
Everyone present at the shuttle landing strip let out a loud cheer and thankful applause upon the safe conclusion to the 135th and last flight of NASA’s Space Shuttle Program – since the first blastoff of Columbia on the STS-1 mission on April 12, 1981.
“Mission complete, Houston,” radioed Commander Ferguson. “After serving the world for over 30 years, the space shuttle has earned its place in history. It’s come to a final stop.”
But the sinking realization that America at that exact moment had simultaneously and voluntarily lost 100% of our indigenous national capability to send humans and cargo to the International Space Station is quite troubling to say the least.
The end of the shuttle program also marked the end of employment for nearly 2000 highly talented shuttle workers in the midst of a continuing tough economic situation all across the US. And thousand more pink slips are looming.
The primary goal of the STS-135 mission was to deliver more than 9,400 pounds of spare parts, food, water, science experiments and assorted gear to the International Space Station that were loaded aboard the Raffaello multi-purpose logistics module – which functions as a ‘moving van’ in space.
All these supplies are “absolutely mandatory”, according to top NASA managers, for sustaining ISS operations for about one year into 2012. By that time NASA hopes that two US commercial space companies – SpaceX and Orbital Sciences – will have flown successful unmanned cargo flights to replace the capability completely lost with the premature retirement of NASA’s three orbiter fleet of winged Space Shuttles.
For the return trip to Earth, the 21-foot long, 15-foot diameter Raffaello brought back nearly 5,700 pounds of valuable science samples and unneeded trash to free up coveted storage space aboard the massive orbiting outpost.
“Although we got to take the ride,” said Commander Chris Ferguson on behalf of his crew,” we sure hope that everybody who has ever worked on, or touched, or looked at, or envied or admired a space shuttle was able to take just a little part of the journey with us.”
Upon departing Atlantis at the shuttle runway, Ferguson and the entire crew were welcomed back by NASA Administrator Charles Bolden and other senior officials.
“They have come to be known as the ‘final four.’ They did an absolutely incredible job,” said Bolden. “They made us very proud.”
“I really want to thank the space shuttle team and the Space Shuttle Program for just a tremendous effort today and throughout the entire history of the program. We gave them a tremendous challenge to fly and execute these missions and to finish strong and I can tell you today that the team accomplished every one of those objectives,” said Associate Administrator for Space Operations Bill Gerstenmaier at a post landing briefing for reports at the Kennedy Space Center. “I’d also like to thank the nation for allowing us to have these thirty years to go use the shuttle system.”
“It is great to have Atlantis safely home after a tremendously successful mission — and home to stay,” said Bob Cabana, Kennedy Space Center director.
Atlantis future retirement home will be constructed just a short distance away at Kennedy Space Center Visitor Complex (KSCVC).
Visitor Complex COO Bill Moore told me that he expects Atlantis will be put on permanent public display in 2013 after completion of a new 64,000 sq. ft exhibition building to house the orbiter. Atlantis will be displayed as though it were “In Flight.”
“I’m unbelievably proud to be here representing the Space Shuttle Program and the thousands of people across the country who do the work,” said Mike Moses, space shuttle launch integration manager. “Hearing the sonic booms as Atlantis came home for the last time really drove it home to me that this has been a heck of a program.”
“The workers out here and across the country in the Space Shuttle Program have dedicated their lives, their hearts and their souls to this program, and I couldn’t be more proud of them,” said Mike Leinbach, the space shuttle launch director at KSC.
Altogether Atlantis flew 33 missions, spent 307 days in space, orbited Earth 4,848 times and traveled 125,935,769 miles. Atlantis was the last of NASA three orbiters to be retired and closed out the Space Shuttle Era.
Wheels stop marked the dreaded end of American manned spaceflight from American soil for many years to come. No one can say with certainty how or when America will again launch humans to space.
From one moment to the next America’s leadership in space position has evaporated – with the utilization of the most capable spaceship ever built and now operating at the peak of its performance yielding instead to reigning uncertainly as to what comes next given the dire outlook for the NASA budget in the foreseeable future.
A new US manned launch system – most likely in the form of a commercial “space taxi” – could perhaps lift off by mid-decade, but the task is formidable and the funding obstacles are sky high.
In the meantime, America is fully dependent on the Russians to loft Americans to space. All US astronauts headed to the ISS for the next three to five years at a minimum will be forced to hitch a ride aboard a Russian Soyuz capsule.
Atlantis Final Landing Photos contributed by Alan Walters, Ken Kremer, Mike Deep, David Gonzales, John L. Salsbury and Chase Clark
Up next: Wheels Stop with Atlantis on the Shuttle Landing Strip and Towback to the Orbiter Processing Facility
NASA’s Dawn Asteroid Orbiter is now spiraling down ever closer to the protoplanet Vesta – since arriving on July 16 – and capturing magnificent new high resolution images of the huge impact basin at the South Pole that dominates the surface. See enhanced image here.
The Dawn team just released a new image taken by the framing camera on July 18 as the orbiter flew from the day side to the night side at an altitude of 10,500 kilometers above Vesta, the second most massive body in the main Asteroid Belt between Mars and Jupiter.
“I find this picture very dramatic !” exclaimed Dr. Marc Rayman, Dawn Chief Engineer from the NASA’s Jet Propulsion Laboratory in Pasadena, Calif., in an interview with Universe Today.
“Dawn acquired this image after it had flown past the terminator and its orbit began taking it over the night side of Vesta.”
“After having this view, the spacecraft resumed gradually spiraling around its new home, heading for survey orbit where it will begin intensive observations of Vesta,” Rayman told me.
Dawn will reach the initial science survey orbit in early August, approximately 1700 miles above the battered surface. Vesta turns on its axis once very five hours and 20 minutes.
Vesta suffered an enormous cosmic collision eons ago that apparently created a gigantic impact basin in the southern hemisphere and blasted enormous quantities of soil, rocks and dust into space. Some 5% of all meteorites found on Earth originate from Vesta.
“The south pole region was declared to be a large impact basin after the Hubble Space Telescope (HST) data and images were obtained,” elaborated Prof. Chris Russell, Dawn Principal Investigator from UCLA.
“Now that we have higher resolution images we see that this region is unlike any other large impact on a small body but much of our experience here is on icy bodies of similar size,” Russell told me.
Dawn’s new images of Vesta taken at close range from just a few thousand miles away, now vastly exceed those taken by Hubble as it circled in Earth orbit hundreds of millions of miles away and may cause the science team to reevaluate some long held theories.
“The team is looking forward to obtaining higher resolution data over this region to look for confirmatory evidence for the impact hypothesis. They are not yet willing to vote for or against the HST interpretation. Needless to say the team got very excited by this image,” said Russell.
Dawn will orbit Vesta for one year before heading to its final destination, the Dwarf Planet Ceres.
In the weeks leading up to the launch of Space Shuttle Atlantis, I had the distinct honor to speak on several occasions with Chris Ferguson, the Space Shuttle Commander of the STS-135 mission that will soon close out NASA’s Space Shuttle Era.
Chris talked to me about his childhood experiences that led him to “love science” and how he strongly believes in “giving back” to a community that enriched him so much – and eventually led him to his career as a space shuttle astronaut.
That passion for science and giving will result in an extraordinary and out of this world gift to the people of Philadelphia, Pennsylvania, hometown to Chris Ferguson that he hopes will inspire kids to love science.
At that time Ferguson had already been a veteran space flyer with two trips to the International Space Station – but he not yet been named to command the last shuttle flight. Over 150 folks attended Ferguson’s talk – held in the presence of the marble statue of Benjamin Franklin. The statue is a US National Historic Landmark.
As a child, Chris attended classes from grade school to high school in Philadelphia, the city of brotherly love.
“I developed and cultivated a love of science, engineering and space in many childhood trips to the Franklin Institute in Philadelphia,” Ferguson told me.
“I was always a science oriented kid growing up. I have an innate curiosity for how things work. The Franklin Institute fed my curiosity.”
“And it was some teachers I had at a young age in my high school in Philadelphia who made me want to understand more. And to understand the reason about why things work the way they do … And to understand why the physical laws that govern the Universe are the way they are.”
“The one thing I could never fathom well was understanding spaceflight. And the way to really understand something is to go do it,” said Chris Ferguson.
“What this is really about is going into space, living and working there and dragging the American public along with us. We need to constantly feed the machine for the folks who are curious and are on a quest to understand things they don’t understand and desire to wonder what’s beyond low Earth orbit and how you live in space for a long period of time.”
“The only way you feed that is by planting the seeds when they are young. You grow the big Oaks out of little acorns.”
“And you get the little acorns at places like the Franklin Institute and the Smithsonian National Air & Space Museum. That’s what did it for me,”
“I think you need to go back and you need to give back. So I’m looking forward to going back to the Franklin Institute !” said Ferguson
And when Chris does go back to the Franklin Institute later this year he will bring along a very very special gift – a piece of the Institute’s Fels Planetarium dome flew millions of miles to the space station and back aboard history’s very last Space Shuttle orbiter – Atlantis – that will ever take a star trek to the High Frontier.
And the project was Ferguson’s idea according to Derrick Pitts, Chief Astronomer at the Fels Planetarium of the Franklin Institute.
“Chris sent me an email asking if we (The Franklin Institute) would like to fly something on STS-135,” Pitts told me.
“I quickly agreed, found out what the criteria for launch would be and then pulled a team together to figure out what to send. It was decided to send a star-shaped piece of the original Fels Planetarium dome.
“The original dome was replaced in 2002 but I’d kept several large sections of the stainless steel panels and had a number of 5-pointed stars about 4″ across cut from the panels to mount and give as gifts to friends of the Fels. It weighs about 6 oz.”
“Since more than 10 million visitors have sat under that dome including several school students who would later become NASA astronauts, it seemed fitting to send one of these stars.”
“The piece presented some problems though. As a stainless steel piece, it has sharp edges and 5 very sharp points – both verboten by NASA and it is ever so slightly oversized. We fixed the worst problem by encasing the star – points edges and all – in a transparent acrylic ‘jewel box’ sandwich held closed with stainless steel screws.”
“We had about ten days from the first email to delivery date to him in Houston. When it returns to Earth, Ferguson has offered to bring it back to Philadelphia where we’ll put it on permanent display in the main Planetarium hallway. This will be the second time Franklin has flown an article with a native Philadelphian astronaut. Our last trip was with Jim Bagian on STS-40 in 1991.”
Chris is a humble, eloquent and down to earth guy and knows how lucky he is to be commanding the grand finale of the thirty year long shuttle program. And he is determined that he and his STS-135 crew of four do their very best to accomplish all their goals.
“I’m just proud to be a small part of it and am savoring the moment. We’re focused on the mission now and will have time to ponder this moment in history when it’s all over,” Ferguson concluded.
Space Shuttle Atlantis and her crew of 4 are scheduled to land at 5:56 a.m. on July 21, 2011 at the Kennedy Space Center in Florida.
The first ever Vesta Vista snapped from the protoplanets orbit has been transmitted back through 117 million miles of space to eager eyes waiting on Earth. Although Vesta had been observed by telescopes on Earth and in space for more than two centuries since its discovery, only scant detail on its surface could be discerned until today.
NASA’s Dawn spacecraft took the new photo of the giant asteroid Vesta on July 17 – enhanced version shown above – less than 2 days after making space history as the first probe ever to enter orbit about an object in the main Asteroid Belt. The team also released their first 3 D image of Vesta. Read my orbital capture story here and see the original NASA image below.
“I think it is truly thrilling to be turning what was little more than a fuzzy blob for two centuries into a fascinating alien world,” said Dawn Chief Engineer Marc Rayman in a new post orbit interview with Universe Today.
Vesta is 330 miles (530 kilometers) in diameter and the second most massive object in the Asteroid Belt between Mars and Jupiter.
“And the closer Dawn gets to Vesta, the more exotic and intriguing the pictures become !,” added Rayman.
Dawn was captured into orbit at an altitude of 9,900 miles (16,000 km) at 1 a.m. EDT on July 16 according to Rayman, of the Jet Propulsion Lab in Pasadena, Calif. and is now slowly descending over the next few weeks.
“The spacecraft remains healthy, and our spiral down to Vesta is going well,” Rayman told me.
The new photo from orbit is nearly centered on the south pole which suffered a devastation cosmic collision eons ago. That blast sent huge plumes of ejecta streaming out, including towards Earth. About 5% of all known meteorites stem from Vesta.
“The south pole is a bulging feature in the images,” said Prof. Chris Russll, Dawn’s Science Principal Investigator of UCLA in an interview.
“The pole is not centered on this feature but is close to it. We have not finalized our determination of the pole but are close to a ‘final’ answer. We are not making interpretations at this point because the greater resolution that is coming will make all today’s speculations moot,” Russell stated.
By early August, Dawn will have gently been nudged into its initial science observation orbit at an altitude of approximately 1700 miles above the scarred surface of newly discovered mountains, craters, grooves, scarps and more.
During the approach phase, the Dawn team will accomplish multiple tasks with its onboard systems and three science instruments; including the search for possible moons, observing Vesta’s physical properties and obtaining calibration data.
But don’t expect a continuous stream of new pictures, according to Russell.
“We will not have a steady stream of images until we are in one of our
three science phases,” Russell told me. “When we are in transit from one place to another we thrust, stop, turn, image, turn, transmit, turn, thrust, and several days later repeat. All time spent not thrusting is time taken away from science later.”
“The next image is scheduled to be snapped on Saturday July 23.”
We will learn a lot more at the next press conference scheduled to take place on Monday August 1 from JPL.
Dawn will spend one year orbiting around Vesta and collecting high resolution mapping images, determining the chemical composition and measuring its gravity field. Then it will fire its ion thrusters to propel the probe to a second destination, the dwarf planet Ceres, arriving in February 2015.
The Asteroid Belt is one of the last unexplored regions of our solar system.
“We are beginning the study of arguably the oldest extant primordial surface in the solar system,” elaborated Russell in a NASA statement. “This region of space has been ignored for far too long. So far, the images received to date reveal a complex surface that seems to have preserved some of the earliest events in Vesta’s history, as well as logging the onslaught that Vesta has suffered in the intervening eons.”