Jump to content


Photo

Comet C/2011 L4 (PANSTARRS)

  • Please log in to reply
724 replies to this topic

#676 Rich (RLTYS)

Rich (RLTYS)

    Fly Me to the Moon

  • *****
  • Moderators
  • Posts: 5244
  • Joined: 18 Dec 2004
  • Loc: New York (Long Island)

Posted 13 April 2013 - 06:39 AM

I've still haven't been able to observe Panstarrs but I finally took an image of Panstarrs with the Slooh Remote Observatory this morning. Most impressive looking. :jump:

Rich (RLTYS)

Attached Files



#677 nytecam

nytecam

    Voyager 1

  • *****
  • Posts: 11507
  • Joined: 20 Aug 2005
  • Loc: London UK

Posted 16 April 2013 - 02:55 AM

Got Panstarrs tonight [below] Apr 15 at dusk from backyard [earlier than on Apr 11] and its seems to have faded over the last 4 days :o

Attached Files



#678 orion61

orion61

    Aurora

  • *****
  • Posts: 4744
  • Joined: 20 Oct 2007
  • Loc: Birthplace James T Kirk

Posted 16 April 2013 - 08:19 AM

Further to my earlier post, I've started to look at the images and it seems most suffer from the streetlight flare to some extent, while the first have some vignetting at the bottom as the comet had not fully cleared the garden fence!

In retrospect, I realise that I became so preoccupied with the flare problem that I didn't stop to study the comet through the scope properly (though I viewed it extensively with binoculars). The weather forecast is not favourable for another chance!

Anyway, below is what I have so far. This was a single 4-minute unguided exposure at ISO 1600 with a C8 (f/6.3 with focal reducer) and a modded EOS 600D. I used DeepSkyStacker to stack the light frame, darks and flats, and used Canon Photo Professional and Paint Shop Pro for post processing.
Nice shot of the Anti-Tail, yours is the best shot I have seen of it.. Nicely done!

Regards and clears skies!



#679 Mike C

Mike C

    Viking 1

  • -----
  • Posts: 945
  • Joined: 05 Mar 2008
  • Loc: Cornwall, UK

Posted 16 April 2013 - 02:17 PM

Nice shot of the Anti-Tail, yours is the best shot I have seen of it.. Nicely done!

Many thanks, Larry!

#680 hiro

hiro

    Apollo

  • -----
  • Posts: 1069
  • Joined: 17 Jul 2007
  • Loc: Tokyo

Posted 18 April 2013 - 12:19 AM

Hi all,

Here is a frame of the comet taken on April 13, 2013UTC.

Posted Image

The original is in my flickr page as usual.
http://www.flickr.co...roc/8658955049/

Dust and gas in the area are visible here.
http://www.flickr.co...roc/6202846967/

Thank you for looking.

#681 Erik Bakker

Erik Bakker

    Gemini

  • *****
  • Posts: 3179
  • Joined: 10 Aug 2006
  • Loc: The Netherlands, Europe

Posted 18 April 2013 - 05:16 AM

Hiro, that is a very impressive image of the comet.

#682 Tonk

Tonk

    Fly Me to the Moon

  • *****
  • Posts: 7128
  • Joined: 19 Aug 2004
  • Loc: Leeds, UK, 54N

Posted 18 April 2013 - 06:41 AM

Hiro - am a fan of your fan ;) Thats a nice deep image

#683 hiro

hiro

    Apollo

  • -----
  • Posts: 1069
  • Joined: 17 Jul 2007
  • Loc: Tokyo

Posted 18 April 2013 - 07:05 AM

Thanks Erik and Tonk for the encouragement of my maddness. ;)

#684 Rich (RLTYS)

Rich (RLTYS)

    Fly Me to the Moon

  • *****
  • Moderators
  • Posts: 5244
  • Joined: 18 Dec 2004
  • Loc: New York (Long Island)

Posted 19 April 2013 - 06:34 AM

To All

Well, I finally got my chance to visually observe C/2011 L4 Panstarrs for the first time this morning, 4-18-13, with my 10” refl. Observed from 4:15 to 5:00 AM when morning twilight began to interfere. Despite light pollution and nearby street lights and with Panstarrs being rather low in the northeast this is what I observed.

At 76x I was able to quickly detect Panstarrs fairly bright coma as a roundish ball of haze with a bright pseudo nucleus that was star like in appearance. I estimated the coma condensation (CC) at 7. At 174x I had a better view of the coma which had somewhat diffused edges.

Panstarrs tail was much more difficult to observe, seemingly only visible with averted vision and “tapping” the scope. The tail appears rather straight and heading in a northerly direction. There seemed to be a slight widening of the tail as it extended from the much brighter coma. I glimpsed a somewhat definite edge on the western side of the tail with the eastern side seemingly more diffused. Most of these observations were made at 174x but the tail was barely observed even at 76x. I did notice that as Panstarrs rose higher in the sky the tail became slightly easier to see and I could observe it with direct vision but it was still extremely faint. I estimated the length of the tail at about 13 arc minutes but I know I was only seeing the brighter western side of Panstarrs tail as the tail is quite wide and diffused.

No color or movement was noted while observing this comet. I’d hoped Panstarrs would have been brighter then it was. This comet needs a darker sky to properly observe it.

Rich (RLTYS)

#685 Wes Stone

Wes Stone

    Explorer 1

  • -----
  • Posts: 75
  • Joined: 20 May 2003
  • Loc: Chiloquin, OR

Posted 19 April 2013 - 06:37 PM

The comet is in Cassiopeia now. It is circumpolar from Oregon, but is higher in the predawn sky. I got a good look at it under dark skies (but subpar transparency with a bit of high haze) on the morning of April 17th just before morning twilight.

The comet was still an impressive naked-eye object, appearing as a diffuse streak about 1 degree long. I'd roughly estimate the integrated magnitude (coma + tail) as about 4.5. The m1 magnitude of the coma alone would be much fainter, but there is not a clear delineation between the coma and tail. Binoculars revealed more detail, but didn't extend the tail length.

The comet was a nice sight in my 10" Dob at low power, sitting in an impossibly rich star field. A 10th-magnitude star was just south of the coma, and over the 30 minutes or so that I observed the comet it moved northward away from this star. The coma diameter was about 4', with a bright almost-stellar pseudonucleus. The coma and the brightest part of the tail were yellowish. Two tail components were visible--a bright, narrow wedge in PA 350 degrees that extended over a degree while fading gradually; and an antitail that emerged in a sharp spike about 20' long in PA 115 degrees. A faint, fan-shaped glow was visible in the angle between the antitail and the main tail.

Here's a sketch: http://skytour.homes...4130417-PSE.jpg

Wes Stone
Chiloquin, OR
http://skytour.homestead.com

#686 Dave Mitsky

Dave Mitsky

    ISS

  • *****
  • Moderators
  • Posts: 36393
  • Joined: 08 Apr 2002
  • Loc: PA, USA, Planet Earth

Posted 19 April 2013 - 08:57 PM

I had completely forgotten that I took a few pictures of Comet PanSTARRS with my iPod Touch on the evening of March 13th. One of them actually turned out to be reasonably good after a little processing.

Dave Mitsky

Attached Files



#687 yashi

yashi

    Vostok 1

  • -----
  • Posts: 149
  • Joined: 15 Nov 2011

Posted 20 April 2013 - 03:27 PM

i finally managed to see it. The brightness predictions are so wrong in reality, i didnt expect that. I was looking for an object with around 5-6mag, in reality it was more like 10mag T_T. At least the 8-9mag stars in the area were much brighter.

I could barely see it in my 6" scope.

#688 RolandosCY

RolandosCY

    Vostok 1

  • -----
  • Posts: 155
  • Joined: 02 Jan 2009
  • Loc: Nicosia, Cyprus

Posted 20 April 2013 - 08:16 PM

Not visible at 4am with 15x70 binoculars from within the city (Nicosia, Cyprus), despite good transparency and the comet being located in a very easy to locate spot in Cassiopeia... Well, here it goes.... See ya in a few dozen thousand years PanSTARRS!!!!! :goodjob:

#689 Mike B.

Mike B.

    Vanguard

  • *****
  • Posts: 2263
  • Joined: 24 Oct 2005
  • Loc: Louisiana

Posted 22 April 2013 - 06:18 PM

I stayed out all night Friday, April 19, 2013 and imaged Comet Panstarrs early morning on Saturday, Apr 20th. Transparency was poor and the LP was almost overwhelming. I couldn't find it in the 10x50 binoculars - too much LP, I guess. I had my TV-85 and Atlas EQ-G tuned in on it, however and managed to get 70x1 minute sub-images. Here's how they came out in processing:

Posted Image

I did a star-freeze process on it, too:

Posted Image

It will probably be two weeks before I can get out again and image the comet. By that time, it will be quite dim compared to how it was in March and early April. Oh, well... it was fun while it lasted. :)

#690 hiro

hiro

    Apollo

  • -----
  • Posts: 1069
  • Joined: 17 Jul 2007
  • Loc: Tokyo

Posted 24 April 2013 - 07:09 AM

Here is a frame of the comet among the gems in Cassiopeia April 21, 2013.

Posted Image

The original is here in my flickr page as usual.

http://www.flickr.co...roc/8678065340/

Thank you for looking.

#691 rdandrea

rdandrea

    Mercury-Atlas

  • *****
  • Posts: 2861
  • Joined: 13 Jun 2010
  • Loc: Colorado, USA DM59ra

Posted 24 April 2013 - 11:00 AM

Lovely photo.

#692 nytecam

nytecam

    Voyager 1

  • *****
  • Posts: 11507
  • Joined: 20 Aug 2005
  • Loc: London UK

Posted 28 April 2013 - 12:26 PM

My pic from LP London Friday night

Attached Files



#693 Rich (RLTYS)

Rich (RLTYS)

    Fly Me to the Moon

  • *****
  • Moderators
  • Posts: 5244
  • Joined: 18 Dec 2004
  • Loc: New York (Long Island)

Posted 04 May 2013 - 07:37 AM

Here's an image of Panstarrs I took this morning (5/4) with the SLOOH T2wf camera.

Rich (RLTYS)

Attached Files



#694 MessiToM

MessiToM

    Viking 1

  • *****
  • Posts: 886
  • Joined: 21 Dec 2009
  • Loc: Huntingdon PA

Posted 05 May 2013 - 04:39 PM

I easily found it this morning a 0300 est 5-5-13 It was obvious but not as bright as I thought/hoped. It was wedge like shaped.

This was through my 17.5"

#695 Tonk

Tonk

    Fly Me to the Moon

  • *****
  • Posts: 7128
  • Joined: 19 Aug 2004
  • Loc: Leeds, UK, 54N

Posted 07 May 2013 - 04:38 AM

I had a late season chance to image the comet last night and early this morning - darkness is only around 4 hours here now and dropping fast. What popped up was the plentary nebula NGC 40 (Caldwell 2) was right in there with the comet! A rather fancy pairing!


This was my last imaging chance for a while as 54N is not blessed with dark night skies from mid May and so we get all night twilight very soon. I don't have time to process this image for a while either as exams start very soon. I'll post up a link in late June.

#696 John Wunderlin

John Wunderlin

    Vendor - Spike-a Focusing Mask

  • *****
  • Vendors
  • Posts: 2277
  • Joined: 01 Oct 2004
  • Loc: Mineral Point, Wi

Posted 09 May 2013 - 02:07 PM

The comet has finally moved past my Western obstructions. This is about an hour of LRGB data from Tuesday night May 7. Not a lot of color that I could bring out on the comet.

Attached Files



#697 John Wunderlin

John Wunderlin

    Vendor - Spike-a Focusing Mask

  • *****
  • Vendors
  • Posts: 2277
  • Joined: 01 Oct 2004
  • Loc: Mineral Point, Wi

Posted 09 May 2013 - 02:08 PM

BTW the light streak from upper left to lower right is a streetlight nebula.

#698 Tonk

Tonk

    Fly Me to the Moon

  • *****
  • Posts: 7128
  • Joined: 19 Aug 2004
  • Loc: Leeds, UK, 54N

Posted 09 May 2013 - 02:15 PM

Not a lot of color that I could bring out on the comet.


This is such a dusty comet that all you are getting is refelected white sunlight. I get no colour as well.

#699 Mike C

Mike C

    Viking 1

  • -----
  • Posts: 945
  • Joined: 05 Mar 2008
  • Loc: Cornwall, UK

Posted 09 May 2013 - 05:45 PM

I got a chance to view and image a late PanSTARRS too, on the evening of 8 May. It's clearly now faint visually, but still an attractive imaging target.

Here's the result of 8 x 5-minute manually-guided exposures at ISO 1600 with a modded EOS 600D and Celestron C8 with focal reducer. Registration and stacking was via DeepSkyStacker.

Regards,

Attached Files



#700 operascope

operascope

    Mariner 2

  • *****
  • Posts: 253
  • Joined: 03 Sep 2008
  • Loc: Canada

Posted 12 May 2013 - 04:52 PM

I finally got to observe Panstarrs from a dark sky site and was very pleasantly surprised. I keep reading post that say that it is "visually faint", and while it is certainly fainter than what it was, it is a very easy catch and very rewarding through my 12" f/5 dob. Both tails were very much present, and it filled up my 35 Panoptic. To me it is the most rewarding telescopic object in the sky right now!
When I pointed it out to the other people at the star party, they were also quite surprised at the view. This comet still has life, and not just for astrophotographers!






Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics