Orpington Astronomical Society

Astronomy => In the Media... => Topic started by: mickw on Nov 04, 2010, 22:14:33

Title: Comet 103P Hartley
Post by: mickw on Nov 04, 2010, 22:14:33
A NASA spacecraft has beamed back the first close-up photos from its rendezvous with a comet — and the images show an ice ball that looks like a giant chicken drumstick, or perhaps a peanut or bowling pin.

Deep Impact zoomed to within 435 miles (700 kilometers) of Comet Hartley 2 at 10:01 EDT (1401 GMT) this morning (Nov. 4), and the probe beamed down its first close-up shots an hour later

Hartley2  (http://www.space.com/scienceastronomy/comet-hartley-2-first-flyby-photos-101104.html)

Title: Re: Comet 103P Hartley
Post by: mickw on Nov 04, 2010, 23:01:38
A bit more:

More  (http://www.space.com/scienceastronomy/deep-impact-comet-flyby-success-101104.html?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed:+spaceheadlines+(SPACE.com+Headline+Feed))

More pics:

http://apod.nasa.gov/apod/ap101105.html  (http://apod.nasa.gov/apod/ap101105.html)
Title: Re: Comet 103P Hartley
Post by: Carole on Nov 05, 2010, 08:08:26
Wow, that is some weird shape and interesting that it has this flat band round the middle with the jets only coming out of the rough ends.

Carole
Title: Re: Comet 103P Hartley
Post by: mickw on Nov 05, 2010, 08:44:50
Looks like like it's stretching itself apart.

Can't find any reference to it rotating which could explain it
Title: Re: Comet 103P Hartley
Post by: Mike on Nov 05, 2010, 08:57:50
Looks like two clumps that have come together. Perhaps the bit in-between is the debris caused by a slow impact that has fell back, obliterating any craters, etc.
Title: Re: Comet 103P Hartley
Post by: mickw on Nov 05, 2010, 09:21:37
If it was debris it should be composed of the same material as the ends so you should get outgassing from it shouldn't you ?
Title: Re: Comet 103P Hartley
Post by: RobertM on Nov 05, 2010, 11:13:47
Looks to me like the two bulb ends have been stretched apart.  The centrifugal effect of tumbling due to a collision and perhaps some tidal disruption in the past might have caused that; just like pulling two pieces of play-doh apart.