Click for an animation of the closest approach of Rosetta to asteroid Steins, taken with the OSIRIS imaging system’s Wide Angle Camera. The image sequence starts 3 minutes before closest approach, from a distance of about 2000 km and ends 4 minutes after closest approach. At the start of the animation, the sun illuminated the asteroid from behind the spacecraft and no shadows are visible on the its surface. Later, the sunlight is incident from the left, and craters and more surface features become visible.
Continue reading ‘Amazing Images of Asteroid Steins from Rosetta’
ESA MISSION UPDATE
ESA’s Rosetta spacecraft will make a historic encounter with asteroid (2867) Steins on 5 September 2008. The doors of ESA’s European Space Operations Centre (ESOC) in Darmstadt, Germany, will be open to the media as of 18:00 on 5 September to follow the fly-by events.
First images and results will be available for presentation to the media during a press conference which will be held at ESOC the following day, Saturday 6 September at 12:00 CEST.
Continue reading ‘ESA’s Rosetta to Rendezvous with Asteroid Steins’
ESA PRESS RELEASE
3 July 2008
Spacecraft controllers have just awoken Rosetta from hibernation to prepare for its encounter with asteroid (2867) Steins on 5 September. ESA’s comet chaser will study the relatively rare asteroid as it flies by on its way to comet 67/P Churyumov-Gerasimenko.
Launched in March 2004, Rosetta will reach its final destination only in 2014, after travelling a total of about 6500 million km. The distance between the spacecraft and the Sun as it approaches the comet will be about 600 million or 4 AU (1 AU or 1 Astronomical Unit is equal to 150 million km, the mean distance between Earth and the Sun).
Rosetta has swung by Earth twice and Mars once, performing gravity-assist manoeuvres, that gave it the necessary boost to continue on its journey. The third and last Earth swing-by is scheduled for November 2009. The spacecraft will also fly by two asteroids and study them on the way: (2867) Steins in September this year and (21) Lutetia in June 2010. As it closes in on (2867) Steins in September, Rosetta will have travelled about 3700 million km and will be 2.1 AU from the Sun.
After its last planetary swing-by on 13 November last year, Rosetta headed towards the asteroid belt located between the orbits of Mars and Jupiter. On 27 March 2008, the spacecraft switched to its near-Sun hibernation mode for a period of three months. During this phase, a few subsystems were put into a dormant state to optimise their lifetime (as this is only the beginning of the mission’s science phase).
Continue reading ‘Rosetta Awakes from Hibernation for Asteroid Encounter’
Gregg Easterbrook takes issue with NASA’s “Who, us?” attitude toward protecting the Earth against errant asteroids in a piece titled, “The Sky is Falling,” in The Atlantic. “The odds that a potentially devastating space rock will hit Earth this century may be as high as one in 10. So why isn’t NASA trying harder to prevent catastrophe?” Easterbook’s answer? NASA is obsessed with putting humans on the moon.
A Russian Progress vehicle was launched from Kazakhstan on Wednesday with fresh supplies for astronauts aboard the International Space Station. And what will the fastest men alive be receiving in additional to their regular shipment of clothes, oxygen and fuel? Snails. Ninety of them. (No, they’re not going to eat them; it’s all part of a biology experiment. Really.)
In other news, SpaceX’s Elon Musk is saying that he could launch astronauts to ISS aboard his Dragon spacecraft by 2011 if NASA gives the OK to develop a human-rated version of the vehicle this summer. This date is at least two years (or four or five) before NASA would be able to launch its Orion vehicle.
This is an ambitious goal given that SpaceX has yet to successfully launch anything into space. It failed in both attempts to launch its small Falcon I rocket; a third attempt is scheduled for next month. Dragon will be launched atop the company’s larger Falcon 9 rocket, which has yet to fly.
The Planetary Society has announced the winners of a competition to design a spacecraft that could intercept and track asteroids that might impact on Earth.
The Society awarded the $25,000 first-place prize to a team led by Spaceworks Engineering of Atlanta and SpaceDev of Poway, California. The team’s $137 million Foresight mission focuses primarily on tracking an asteroid.
Spaceworks and SpaceDev are hoping to launch Foresight between 2012-2014 to rendezvous with asteroid 2004 MN4, also known as Apophis. The asteroid will pass close to the Earth in 2029 and has a slight chance of striking our planet in 2036.