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Go Back   IceInSpace > General Astronomy > Observational and Visual Astronomy

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  #1  
Old 25-10-2007, 06:23 AM
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iceman (Mike)
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Exclamation Comet 17P/Holmes Outburst - now naked eye!

I read about an outburst of Comet 17P/Holmes - now naked eye visible at magnitude 3.5!

More information here:
http://www.aerith.net/comet/catalog/0017P/2007.html

Can Terry or anyone else confirm or provide more information?

Will it be visible for us?
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  #2  
Old 25-10-2007, 06:28 AM
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Spaceweather is reporting it too..

Looks to be too far in the north at the moment for us
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  #3  
Old 25-10-2007, 06:35 AM
Dennis
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Here we go Mike.

From my SkyTools observation planning and charting software: http://www.skyhound.com/cs.html

Cheers

Dennis
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  #4  
Old 25-10-2007, 06:43 AM
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hmm, gets to an altitude of about 5 above my horizon You guys in QLD might have better prospects of seeing it.
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  #5  
Old 25-10-2007, 08:19 AM
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Its true the comet has flared from mag 18 to mag 2.5 over the space of 24 hours! That would be a 1.5 million-fold flare in brightness, easily the largest recorded flare of comet. Its a pity its so low from here (and cloud and rain are forecast). At the moment the comet is being described as like a mag 2.5 nova in Perseus, it looks starlike lthough surely this will change as the dust cloud forming the coma expands..

Comet Holmes is a periodic comet and has been known to flare in the past. In fact it was discovered in 1892, possibly as the result of a major flare. See:

http://www.cometography.com/pcomets/017p.html

Terry
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  #6  
Old 25-10-2007, 08:21 AM
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hey Guys!
Just been getting reports in now via email!
How much excitement has this stirred!
Pity we may not be able to view it!
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  #7  
Old 25-10-2007, 09:13 AM
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They are seeing this comet naked eye at near full moon!!!
Incredible.
Here's hoping that the storms predicts for SEQ tonight are all gone by the time it rises from behind the trees.

Last edited by jjjnettie; 25-10-2007 at 10:29 AM.
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  #8  
Old 25-10-2007, 09:50 AM
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Well, what do you know! Too low from Melbourne, but I have to go to Darwin this weekend! Just checked - it should be about 20 deg altitude by midnight! Given the Moon, I wasn't going to pack the binoculars. Changed my mind now
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  #9  
Old 25-10-2007, 11:23 AM
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I hope we get enough of a break in the clouds tonight for this. It peaks at 12 degrees above the horizon for me. My telescope is going to have to make a rare journey to the front yard for this one.
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  #10  
Old 25-10-2007, 11:31 AM
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Quote:
Originally Posted by erick View Post
Well, what do you know! Too low from Melbourne, but I have to go to Darwin this weekend! Just checked - it should be about 20 deg altitude by midnight! Given the Moon, I wasn't going to pack the binoculars. Changed my mind now
Erick, leave the binoculars and pack me instead! Would be a great sight - enjoy your trip, and I expect a full report.....

Cheers -
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  #11  
Old 25-10-2007, 02:25 PM
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Tomorrow's APOD image will apparently be related to 17P/Holmes' outburst:

http://antwrp.gsfc.nasa.gov/apod/ap071026.html
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  #12  
Old 25-10-2007, 03:23 PM
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the ol 'headless comet' trick, as the yanks call 'em just in time for halloween - weird!
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  #13  
Old 25-10-2007, 05:27 PM
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Comet Holmes is 13degs high and 0 deg N at 01:30 from my location which makes it just skirting the top of the hill
I will give it a try tonight weather permiting
It is at the moment, but fingers crossed it will clear up later:

Ron

Last edited by astroron; 25-10-2007 at 10:21 PM. Reason: Wrong azimuth
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  #14  
Old 25-10-2007, 05:51 PM
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can just see it from the hunter valley - will endeavour to go and find this
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  #15  
Old 25-10-2007, 07:07 PM
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According to my chart, it should be around 9 degrees above the horizon at 1:30 am.....
Looks like a trip to Walcha Aerodrome for this one!
The comet is quite stellar in appearance and no tail is visible according to reports from the Yahoo comet group, its been measured at mag 2.1 and 3 arc mins in dia. from one observer using CCD equipment, others report that its magnitude has peaked already......

Wish these bloody clouds would go away soon so i can have a look! hehe
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  #16  
Old 25-10-2007, 10:12 PM
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A report from D.R.Lunsford.
Well that was the shortest observing session in history. When you
start with the humidity at 98 percent, dew is not far behind. But I
did get an excellent view of it! The comet appeared yellowish and
there were hints of color gradations, I thought I saw a hint of
magenta and green, perhaps flourescence, in the transition area from
the nucleus to the surrounding cloud. The sight was spectacular beyond
words, very eerie, not at all like a typical bright comet. There was
some hint of asymmetry forming in the nucleus, and incipient tail. It
looked like a very bright, out of focus, yellowish globular cluster
more than anything else! I mean it was BRIGHT - the surface brightness
was very high - nearing Saturn in appearence.
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  #17  
Old 25-10-2007, 10:53 PM
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sure is an oddity! and at that distance yikes,
its all good,
for quite a few of the poor buggers in NH havent seen a decent comet in a while
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  #18  
Old 25-10-2007, 10:55 PM
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bugger them we want to see the darn thing tooo
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  #19  
Old 25-10-2007, 11:10 PM
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It is Hissing down at the moment so it looks like no Comet viewing tonight
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  #20  
Old 25-10-2007, 11:18 PM
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ballaratdragons (Ken)
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Yeah I can't see it either Ron.

I have this stupid Horizon in the way!

Anyone want a used Horizon. FREE! Take it away!!!
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