New Meteor ?, Astronomy |
New Meteor ?, Astronomy |
Oct 25 2005, 02:44 PM
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#1
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Senior Member Group: Members Posts: 1089 Joined: 19-February 05 From: Close to Meudon Observatory in France Member No.: 172 |
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Oct 25 2005, 07:13 PM
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#2
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Member Group: Members Posts: 470 Joined: 24-March 04 From: Finland Member No.: 63 |
This sure does look like a meteor (some of the ones in earlier night time pics did too), though there are a lot of cosmic rays too. I think it would be pretty unlikely for a cosmic ray to make such a long mark without being deflected.
About the brightness: you have to remember that the pancam is a pretty long telephoto lens and with that sort of magnification you see quite dim objects. Also CCDs are quite sensitive instruments. The field of view of the pancam is also quite small and you see a lot of stars there, meaning that the dimmest are quite dim (longer exposures don't help that much, as the stars aren't tracked). They probably are dimmer that we would see with naked eye, maybe 7-8 mag. Therefore that meteor doesn't really need to be that bright, probably dimmer than 0 mag, so not in the fireball range. antti -------------------- Antti Kuosmanen
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