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SabiaJD
scholastic sledgehammer


Reged: 02/20/05

Loc: Clarks Summit, PA
Re: Comet C/2011 L4 (PANSTARRS) new [Re: stevecoe]
      #5739034 - 03/17/13 04:24 PM

Quote:

Howdy all;

I had lots of fun at the Messier Marathon last night. I saw Comet Panstarrs in modest binoculars and in Paul Lind's 14 incher. John Rhodes, the Televue rep, imaged it in a TV 101 and for short exposures there were three nuclei seen. You had to zoom in the image, but they were there. Anyone else see this? It was not seen visually, I saw it as having an elongated core, but not seperate pieces. If I remember, John said he shot 3 or 5 second exposures.

Clear skies;
Steve Coe




Wondering about the time the 3 three nuclei were seen or imaged in the TV 101 vs. time not seen in the 14 incher.

From experience viewing comet West in a 9.5 inch f/15 A. Clark refractor in 1976, the 3 to 4 individual nuclei of that comet were not readly noticable until twilight sky conditions. Before twilight the nucleus was seen as a single object as they formed a tight group on 1976 March 12.

Comet West was rising in the morning, PANSTARRS setting in the evening sky.

One may be abe to see or image individual nuclei or image with a telescope during early twilight?

Sky is cloudy at my location, not expecting clearing conditions. My TV 101, non-GOTO mount, has been ready to go for a while, the sky is not cooperating around here.


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zee
super member


Reged: 07/04/07

Loc: Arizona (varies)
Re: Comet C/2011 L4 (PANSTARRS) new [Re: Tonk]
      #5739519 - 03/17/13 07:50 PM

NOT My PIC!, but I thought this was totally cool:

http://spaceweather.com/gallery/indiv_upload.php?upload_id=79004&PHPSESSI...

again, not my pic!


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Tonk
Postmaster
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Reged: 08/19/04

Loc: Leeds, UK, 54N
Re: Comet C/2011 L4 (PANSTARRS) new [Re: stevecoe]
      #5739569 - 03/17/13 08:20 PM

Quote:

... there were three nuclei seen ...




Spaceweather is showing images today of a nucleus break up event

Scroll down on this

http://spaceweather.com/archive.php?view=1&day=17&month=03&year=2013


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BrooksObs
professor emeritus


Reged: 12/08/12

Re: Comet C/2011 L4 (PANSTARRS) new [Re: Tonk]
      #5739890 - 03/18/13 12:15 AM

Quote:

Spaceweather is showing images today of a nucleus break up event

Scroll down on this






If the little companion body seen in the PanSTARRS images is real, and I question that since the companion is not present on other images, then it would be a singularly odd situation. Its distance from the comet's head (maybe 1'-2' as seen projected on the plane of the sky) would imply a separation date long before perihelion took place and its location relative to the nucleus suggests its motion after separation carried it sunward and trailing the primary. Again, this would be a highly unusual situation.

On another front, I'm hope that tomorrow will see the comet's quoted magnitude on Spaceweather revised. While therein it is stated as currently +0.2 , in fact I obtained +2.6 this evening, which would be much more in line with PanSTARRS proving to be a difficult object to spot without some form of optical aid in recent days.

BrooksObs

Edited by BrooksObs (03/18/13 12:22 AM)


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MtnGoat
Carpal Tunnel
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Reged: 02/18/07

Loc: Columbia Gorge, WA
Re: Comet C/2011 L4 (PANSTARRS) new [Re: BrooksObs]
      #5740065 - 03/18/13 04:11 AM Attachment (35 downloads)

I have what looks like a fragment in shots taken tonight.

i've ramped the contrast and gone negative on the images a few times, and can't see any of the field stars doubled so I don't think it's a vibration artifact but who knows.

I can't find that it's a field star which the comet is passing nearby, either. I know I must be making some mistake?

Edited by MtnGoat (03/18/13 04:12 AM)


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MtnGoat
Carpal Tunnel
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Reged: 02/18/07

Loc: Columbia Gorge, WA
Re: Comet C/2011 L4 (PANSTARRS) new [Re: MtnGoat]
      #5740069 - 03/18/13 04:15 AM Attachment (37 downloads)

here it is inverted. note field star upper right. I suppose the nucleus is so much brigher that even a momentary gust could double expose it like that and not show up on the field star. Still, unless someone else reports it, it must be some kind of vibration artifact. it was pretty gusty

shots taken with a meade SN6, Canon 1100d prime focus, 3200 ISO 4 seconds I think

Edited by MtnGoat (03/18/13 04:22 AM)


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Grava T
Pooh-Bah
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Reged: 06/18/08

Loc: Quebec, Canada
Re: Comet C/2011 L4 (PANSTARRS) [Re: MtnGoat]
      #5740203 - 03/18/13 08:08 AM Attachment (39 downloads)

Finally got a clear night to view comet Panstarrs. My first comet observation ever. Beautiful!

Canon 60D, 6seconds, f/5.6, ISO1250.


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MessiToM
scholastic sledgehammer
*****

Reged: 12/21/09

Loc: Huntingdon PA
Re: Comet C/2011 L4 (PANSTARRS) [Re: Grava T]
      #5740205 - 03/18/13 08:13 AM

Very nice ^

Mtngoat looks just like spaceweather.com s image to me


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BrooksObs
professor emeritus


Reged: 12/08/12

Re: Comet C/2011 L4 (PANSTARRS) [Re: MessiToM]
      #5740222 - 03/18/13 08:29 AM

MtnGoat, I would note that in comparing the position of the supposed secondary object relative to the location of the comet's nucleus on the Spaceweather image and yours that the object appears to occupy a slightly but still quite noticeably different position. This degree of motion over the course of just a couple of nights would be physically almost impossible for a true fragment. So, I would have to conclude that there must be some alternate explanation for the companion object's image unless many more such photos come to light.

BrooksObs

Edited by BrooksObs (03/18/13 08:30 AM)


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MikeBOKC
Post Laureate
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Reged: 05/10/10

Loc: Oklahoma City, OK
Re: Comet C/2011 L4 (PANSTARRS) [Re: BrooksObs]
      #5740237 - 03/18/13 08:39 AM

Who wants to bet that within 24 hours there will be an internet thread somewhere about the "alien spacecraft" flying in formation with the comet . . .

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John Wunderlin
Vendor - Spike-a Focusing Mask
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Reged: 10/01/04

Loc: Mineral Point, Wi
Re: Comet C/2011 L4 (PANSTARRS) [Re: MikeBOKC]
      #5740860 - 03/18/13 02:50 PM

Had a very nice view of it last night with about 20 friends. Experienced observers with us were able to just make it out naked eye/averted vision, but it's a tough one. Through my 20x80 binos it was beautiful with the tail pointing nearly straight up. There were 6 pre-teens with us who were very excited to see the comet in spite of the sub-freezing temps.

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stevecoe
"Astronomical Tourist"
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Reged: 04/24/04

Loc: Arizona, USA
Re: Comet C/2011 L4 (PANSTARRS) [Re: John Wunderlin]
      #5740989 - 03/18/13 03:45 PM

John;

We had similar viewing last night, but very different temperatures. I am in my RV at a park about 8 miles for Wickenburg, Arizona. We also had 20 people, many with their own binoculars and had the 20X80's on a big tripod. The view was very nice and the tail and bright coma really showed off.

I agree that there will be reports of the "spaceship" next to the comet starting up soon--if they are already not up and running.

Clear skies;
Steve Coe


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Dave Mitsky
Postmaster
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Reged: 04/08/02

Loc: PA, USA, Planet Earth
Re: Comet C/2011 L4 (PANSTARRS) [Re: stevecoe]
      #5741117 - 03/18/13 04:45 PM

Last Thursday evening was rather cold and quite windy but six fellow Astronomical Society of Harrisburg members and I braved the conditions to view C/2011 L4 (PanSTARRS) from the ASH Naylor Observatory - http://www.astrohbg.org/ASH-i/Naylor_Observatory_info.html - near Lewisberry, Pennsylvania. I’d seen this visitor from the Oort Cloud for about 25 minutes the previous evening from another location through Celestron 10x50 and Burgess Optical 15x70 binoculars. On Thursday, I was able to observe the comet for about three-quarters of an hour through three Celestron binoculars (8x42s, 10x50s, and 15x70s), three refractors (an 80mm iOptron achromat, my 101mm Tele Vue TV-101 apochromat, and the 5" finder scope for the 17” classical Cassegrain), an 8" Meade LX90ACF SCT, and the observatory’s 17" classical Cassegrain.

The young owner of the iOptron refractor and the Meade SCT was able to locate Comet PanSTARRS with both go-to telescopes about 10 minutes before anyone was able to spot it with binoculars. He also captured images of the comet with a 300mm zoom lens and a Canon XTi DSLR camera that was piggybacked on top of his 8" SCT. I never saw the comet naked-eye but he did.

Comet PanSTARRS sported a short, curving dust tail. I wasn’t able to detect the weak ion tail visually. Its coma was a bright, star-like point.

The comet was fairly impressive through the 17” at 162x (40mm University Optics MK-70). It was quite low in the sky by then and had acquired a pale orange hue as a result.

I caught my last view of Comet PanSTARRS through the 8” SCT around 8:30 p.m. EST. By then, it was only a bit more than one degree above the horizon.

I also observed the crescent Moon, M41, M42 and the Sword of Orion, M44, and M45 that evening using my 101mm TV-101 refractor and a 14mm Explore Scientific 82 degree eyepiece (38x) and Jupiter at 162 and 216x using the 17" classical Cassegrain.

Dave Mitsky


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steveyo
super member


Reged: 03/13/12

Loc: Upstate NY
Re: Comet C/2011 L4 (PANSTARRS) [Re: stevecoe]
      #5741143 - 03/18/13 04:56 PM

I've been very frustrated by a (false) sighting on 3/8, then nothing but clouds since then. Last night 3/17/2013, looked clear so I drove to my usual spot for viewing the clouds that block PanSTARRS.

I pulled in next to a guy sitting in his vehicle and pointing big binos toward the western horizon. It turned out to be a member of the Albany Astro club, Lou, whom I'd yet not met. He saw me get out of my truck with binos, and he got out, too. We introduced ourselves, and both resumed scanning for the comet.

We chatted and scanned until, FINALLY!! , I spotted it, higher than we'd expected to see it. 10 degrees always surprises me with how far it is from the horizon. I gave Lou quick directions to find it, and we both stood and looked for a while.

Then he set up a tripod and refractor for closer inspection, as I continued to soak up the view.

I was using a pair of Leupold 8X50s and he used Celestron 15x70s. I also viewed it with my Pentax 20x60s, and then through Lou's AS102. I tried to block foreground lights with my arm and find it with naked-eye. I may have seen a flicker of it, but it may have been "averted imagination".

Lou tried to image it, but either smog or a cloud was messing with us as the time drew on, and thwarted his valiant efforts in the 15 deg F temps.

Still, I'm so relieved to have found the darn thing at long last! Good thing, too, because the CSC shows straight white for the next few days.

Edited by steveyo (03/19/13 05:20 PM)


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IvarMorten
newbie


Reged: 03/08/10

Re: Comet C/2011 L4 (PANSTARRS) [Re: steveyo]
      #5741174 - 03/18/13 05:09 PM Attachment (33 downloads)

Here is an image of the comet taken from the northern part of Norway at 65.46°N, 12.21°E.

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IvarMorten
newbie


Reged: 03/08/10

Re: Comet C/2011 L4 (PANSTARRS) [Re: IvarMorten]
      #5741184 - 03/18/13 05:14 PM Attachment (21 downloads)

Another one with a meteor.

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RolandosCY
super member


Reged: 01/02/09

Loc: Nicosia, Cyprus
Re: Comet C/2011 L4 (PANSTARRS) [Re: BrooksObs]
      #5742243 - 03/19/13 03:15 AM

Quote:

On another front, I'm hope that tomorrow will see the comet's quoted magnitude on Spaceweather revised. While therein it is stated as currently +0.2 , in fact I obtained +2.6 this evening, which would be much more in line with PanSTARRS proving to be a difficult object to spot without some form of optical aid in recent days.

BrooksObs



Dear John, having observed this comet finally without clouds on the sky, I wonder about this 2.6 magnitude. I am not experienced in judging comet magnitudes, but certainly, from 34.5 N under totally clear and transparent skies it seemed brighter than 2. On Sunday evening we could easily locate it naked eye with direct vision as a fuzzy star, and at times we could detect a tiny tail with averted vision. No equally bright nearby stars to compare, but it seemed to be much brighter than Algenib or alpha and beta Aries (mag 2 to 2.8). I estimated it around 1, and a friend around 0.5. Now, as I said I don't have much experience, and certainly nothing to compare with your experience. But wouldn't an extended fuzzy object of 2.6 seem fainter than a 2.7 star? Just curious...


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RolandosCY
super member


Reged: 01/02/09

Loc: Nicosia, Cyprus
Re: Comet C/2011 L4 (PANSTARRS) [Re: RolandosCY]
      #5742248 - 03/19/13 03:19 AM Attachment (18 downloads)

...And finally some photos (with an old, vintage digital camera) from Larnaca, Cyprus. Sorry for the bad quality, it actually looked much better than this!!!

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RolandosCY
super member


Reged: 01/02/09

Loc: Nicosia, Cyprus
Re: Comet C/2011 L4 (PANSTARRS) [Re: RolandosCY]
      #5742250 - 03/19/13 03:21 AM Attachment (16 downloads)

Quote:

...And finally some photos (with an old, vintage digital camera) from Larnaca, Cyprus. Sorry for the bad quality, it actually looked much better than this!!!



...and another...


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johnpd
sage


Reged: 04/13/08

Re: Comet C/2011 L4 (PANSTARRS) [Re: RolandosCY]
      #5742345 - 03/19/13 06:55 AM Attachment (26 downloads)

I took this picture from Southern Arizona Sunday night of the comet using a C-6 at f/6.3 on an iOptron MiniTower Alt-Az mount. The camera was a Nikon D90, exposure 30 secs at ISO 800.



Edited by johnpd (03/19/13 07:04 AM)


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