Huge comet outburst reported, 17P/Holmes |
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Huge comet outburst reported, 17P/Holmes |
 Nov 1 2007, 09:25 AM
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#91
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 Senior Member  Group: Moderator Posts: 2126 Joined: 9-February 04 From: UK Member No.: 16  |
Isn't this a job for HiRISE? They were able to point it at the Earth not long ago so why not Holmes. Should be able to get some decent resolution unlike most cameras out there.
-------------------- My MER & MSL Imagery site - Martian Vistas ---- Twitter Feed (including sol by sol updates on Opportunity's activity)
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Nov 1 2007, 09:55 AM
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#92
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 Member Group: Members Posts: 521 Joined: 24-November 04 From: Heraklion, GR. Member No.: 112 |
Isn't this a job for earth-based telescopes and Humble first ?
We are so lucky to be able to see this with our naked eyes, from Earth, and we still want more. We have to observe it from other planets... Is it even remotely possible to satisfy the human race ? 
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Nov 1 2007, 10:29 AM
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#93
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 Administrator Group: Chairman Posts: 13240 Joined: 8-February 04 Member No.: 1 |
I don't think the view from Mars would be significantly different to that from Earth.
http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=17p&orb=1 We're both in the same sort of direction from the comet - perhaps only 20 degrees different. Maybe worth a go if it's easy enough. Looking more carefully, NH couldn't (it'd be far too close to the Sun)....Cassini, maybe. Doug |
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Nov 1 2007, 11:06 AM
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#94
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 Senior Member Group: Members Posts: 2930 Joined: 4-November 05 From: North Wales Member No.: 542 |
QUOTE (djellison @ Nov 1 2007, 10:29 AM)  We're both in the same sort of direction from the comet - perhaps only 20 degrees different. That's more than enough for a good stereo view so I'd say it's intrinsically worth doing with HiRise, several times if possible as the tail evolves. However I have no idea what the cost would be in terms of Mars surface data. Incidentally, what about CRISM? |
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Nov 1 2007, 12:29 PM
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#95
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Senior Member Group: Members Posts: 2930 Joined: 4-November 05 From: North Wales Member No.: 542 |
Couldn't resist posting this gem from SpaceWeather:
http://www.spaceweather.com/comets/holmes/...Teri-Smoot1.jpg Let's hope Teri's clear skies continue! |
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Nov 1 2007, 06:28 PM
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#96
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 Senior Member Group: Members Posts: 1146 Joined: 3-August 06 From: 43° 35' 53" N 1° 26' 35" E Member No.: 1004 |
I saw it again 5 minutes ago. Still visible with the naked eye under light polluted sky. I finally got to see it with my 5 inch telescope. It is quite amazing and with the telescope it shows some internal structure within the spherical blob. A wide "V" shaped inner core is easily visible.
-------------------- I'm one of the most durable and fervent advocates of space exploration, but my take is that we could do it robotically at far less cost and far greater quantity and quality of results.
James Van Allen |
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Nov 1 2007, 06:37 PM
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#97
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Senior Member Group: Members Posts: 1146 Joined: 3-August 06 From: 43° 35' 53" N 1° 26' 35" E Member No.: 1004 |
Has anybody seen this description of Holmes in 1892? it nearly matches what we are seeing now!
http://cdsads.u-strasbg.fr/full/1892MNRAS..53...65R And this appears to be the only scientific paper on our dirty iceball friend http://cdsads.u-strasbg.fr/abs/1984Icar...60..522W http://cdsads.u-strasbg.fr/full/1983BAAS...15..805W -------------------- I'm one of the most durable and fervent advocates of space exploration, but my take is that we could do it robotically at far less cost and far greater quantity and quality of results.
James Van Allen |
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Nov 1 2007, 06:58 PM
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#98
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 Senior Member Group: Members Posts: 1111 Joined: 12-February 06 From: Marseille - FR Member No.: 678 |
I have seen it with nude eyes and with my 130mm telescope. Amazing and very strange comet. An unsual form for a comet.
So, this is the first comet I can see so easily from the great Hale-Bopp comet. Tonight, I will try to image the comet. -------------------- |
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Nov 1 2007, 08:11 PM
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#99
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Rover Driver Group: Members Posts: 980 Joined: 4-March 04 Member No.: 47 |
some lovely clear nights here lately and I think I've seen it, but it is hard to say with the naked eye and a bad knowledge of the night sky. But I'm sure I saw a shooting star as well
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Nov 2 2007, 09:34 AM
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#100
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Senior Member Group: Members Posts: 1146 Joined: 3-August 06 From: 43° 35' 53" N 1° 26' 35" E Member No.: 1004 |
A nice paper which includes observations of the bare nucleus of Holmes, infos on its diameter and possible rotation rates
http://star.pst.qub.ac.uk/comast/papers/mnrascomets2006.pdf -------------------- I'm one of the most durable and fervent advocates of space exploration, but my take is that we could do it robotically at far less cost and far greater quantity and quality of results.
James Van Allen |
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Nov 2 2007, 12:00 PM
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#101
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Senior Member Group: Members Posts: 1111 Joined: 12-February 06 From: Marseille - FR Member No.: 678 |
Watson... oops... Holmes, the last night :
 130/900 sky watcher telescope. 20mm eyepiece front of a Pentax Optio M30. 800 iso. Auto exposure (night mode). Results of stacking of 23 images. -------------------- |
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Nov 2 2007, 02:52 PM
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#102
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 Senior Member Group: Admin Posts: 4500 Joined: 15-March 05 From: Sloughhouse, CA Member No.: 197 |
OK. You win Ant. That saves me a cold damp evening in the backyard. Absolutely breathtaking!
-------------------- If Occam had heard my theory, things would be very different now.
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Nov 2 2007, 03:21 PM
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#103
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Member Group: Members Posts: 624 Joined: 10-August 05 Member No.: 460 |
QUOTE (Paolo @ Nov 1 2007, 12:37 PM) And this appears to be the only scientific paper on our dirty iceball friend Or rather an icy dirtball, according to our experience with Tempel 2, and every other close comet inspection. |
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Nov 2 2007, 07:58 PM
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#104
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Senior Member Group: Members Posts: 1146 Joined: 3-August 06 From: 43° 35' 53" N 1° 26' 35" E Member No.: 1004 |
Slightly "fuzzier" this evening, but still visible with the naked eye.
-------------------- I'm one of the most durable and fervent advocates of space exploration, but my take is that we could do it robotically at far less cost and far greater quantity and quality of results.
James Van Allen |
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Nov 2 2007, 09:39 PM
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#105
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Administrator Group: Chairman Posts: 13240 Joined: 8-February 04 Member No.: 1 |
I've brought a camera home from work ( A Sony VX2000E Mini DV camera ) because I've got stuff I may want to film on Sunday...but I thought 'wonder if it'll see the comet'
Did it ever!!! Screenshots and movies later. Doug |
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