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Ben B
member


Reged: 02/03/13

Loc: GA
Re: Comet C/2011 L4 (PANSTARRS) [Re: peteryan]
      #5724956 - 03/10/13 11:40 PM

Quote:

Good job Ben! Couldn't get an image from my location.
What camera/lens/exposure?
Pete




Thanks! The image was taken with a Sony RX100 (high end point-and-shoot) at 37.1mm, ISO 200, 3.2 seconds @ f / 4.9. The image is cropped to about half its actual field of view and size reduced for display on here. There's a higher resolution version of the same crop at http://www.flickr.com/photos/benbrowning/8546160055/sizes/k/in/set-7215763293...

The comet had more structure visible in binoculars than what shows up in the image. I didn't have enough time to dial-in focus and tweak other settings before it dropped below the clouds.


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Edward E
scholastic sledgehammer
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Reged: 03/26/06

Loc: Tucson, Arizona
Re: Comet C/2011 L4 (PANSTARRS) [Re: Edward E]
      #5724964 - 03/10/13 11:45 PM Attachment (66 downloads)

Another with a 3 second exposure:

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saguaro
member


Reged: 04/19/12

Loc: Southern Arizona
Re: Comet C/2011 L4 (PANSTARRS) [Re: Edward E]
      #5724974 - 03/10/13 11:52 PM

Edward,

I spotted the comet setting over the Tucson Mountains at 7:11 pm, just a minute after your sighting! Easily seen in 7x50 binoculars but not with the naked eye. Tracked it in my 8-inch SCT until it disappeared in the horizon haze at 7:32 pm.

-Robin in Tucson (near Saguaro Natl Park West)


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Jon Isaacs
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Reged: 06/16/04

Loc: San Diego and Boulevard, CA
Re: Comet C/2011 L4 (PANSTARRS) [Re: saguaro]
      #5724988 - 03/11/13 12:14 AM

I saw it again tonight from my urban driveway. Picked it up in an Orion 100mm r/6 at 37.5x about 6 degrees elevation. I point the scope with a digital level and Sky Safari, the deviation between the two was 0.1 degree... Small tail. Visible in 11 x 80s and 10 x 42s.

Jon


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Jay
member
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Reged: 09/01/06

Loc: Southern California
Re: Comet C/2011 L4 (PANSTARRS) [Re: Unknownastron]
      #5724991 - 03/11/13 12:15 AM Attachment (75 downloads)

Hi all!

Fun night and good news. My COMTRAIL PanSTARRs was back again today. Brighter, and higher than yesterday and right in the area predicted by Starry Night Pro (just like yesterday March 9, 2013)

Thank you to those of you that gave me the benefit of the doubt yesterday. Unkownastron, I hope this gets you off the fence and at least put me in the plausible column.

Attached is a 20 second exposure with a 135mm lens.

Jay

Edited by Jay (03/11/13 12:22 AM)


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Jay
member
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Reged: 09/01/06

Loc: Southern California
Re: Comet C/2011 L4 (PANSTARRS) [Re: Jay]
      #5724996 - 03/11/13 12:18 AM Attachment (64 downloads)

And here's the closeups of yesterday compared to today's 20 second exposure (top) and 1.6 second exposure bottom.

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Jay
member
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Reged: 09/01/06

Loc: Southern California
Re: Comet C/2011 L4 (PANSTARRS) [Re: Jay]
      #5725002 - 03/11/13 12:21 AM Attachment (44 downloads)

And here's another 135mm shot taken at 1.6" showing a round and bright comma.

Thank you!

Jay


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314Sprout
member


Reged: 06/27/12

Loc: San Diego
Re: Comet C/2011 L4 (PANSTARRS) [Re: Jon Isaacs]
      #5725014 - 03/11/13 12:33 AM Attachment (54 downloads)

Here is my iPhone grab of PanSTARRS from San Diego's Black Mountain. AT-72 w/ Baader Zoom at 18mm. Handheld 1's exposure (the only good one of about 12!) just before it set behind San Clemente Island.

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wilki24
newbie


Reged: 05/07/12

Re: Comet C/2011 L4 (PANSTARRS) [Re: Jay]
      #5725017 - 03/11/13 12:33 AM

I caught it yesterday on the 9th:
http://spaceweather.com/gallery/indiv_upload.php?upload_id=77398

And then again today, the 10th:
http://spaceweather.com/gallery/indiv_upload.php?upload_id=77497

I didn't spot it yesterday until I got home and looked at all of the pictures I had taken. Today, it was fairly obvious in 10x50 binoculars. Unfortunately, it was only visible for a few minutes between two bands of clouds.

I'm hoping for improved visibility to the west over the coming week.


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Jay
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Reged: 09/01/06

Loc: Southern California
Re: Comet C/2011 L4 (PANSTARRS) [Re: Jay]
      #5725020 - 03/11/13 12:35 AM Attachment (61 downloads)

Here is a 200mm shot at f8. Some obscene ISO.

Thanks for letting me post and post.

Jay


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johnpd
sage


Reged: 04/13/08

Re: Comet C/2011 L4 (PANSTARRS) [Re: aa6ww]
      #5725061 - 03/11/13 01:10 AM

I saw it this evening from Southern Arizona. As mentioned above the sky needs to get somewhat dark (probably about 40 minutes after sunset), then it will pop out. It was around 5 degrees above the horizon. I was able to view it through a pair of 11x80 binoculars, a 9x50 finder, and a C-6. Was a nice view through the latter.

JohnD


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aa6ww
professor emeritus
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Reged: 10/23/11

Loc: Sacramento, Calif.
Re: Comet C/2011 L4 (PANSTARRS) [Re: Jay]
      #5725083 - 03/11/13 01:27 AM

Quote:

Here is a 200mm shot at f8. Some obscene ISO.

Thanks for letting me post and post.

Jay




Good Job Jay!! You got it tonight!!

...Ralph


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aa6ww
professor emeritus
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Reged: 10/23/11

Loc: Sacramento, Calif.
Re: Comet C/2011 L4 (PANSTARRS) [Re: BillFerris]
      #5725088 - 03/11/13 01:29 AM

Quote:

Enjoyed observing Comet PanSTARRS for about 20 minutes, tonight. Here are a couple of images.






Both images are crops from the same 4288 x 2848 original, which was taken at 7:15 PM MST about a half-mile from my home in Flagstaff, Arizona. The original was taken with a Nikon D90, 300mm (effective focal length, 450mm) f/5.6, ISO 200, 2.5 second exposure. - Bill in Flag




I think that's the most beautiful shot of the night Bill, Bravo!!

...Ralph


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Unknownastron
professor emeritus
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Reged: 04/06/05

Loc: CatsEye Observatory,Rural Sout...
Re: Comet C/2011 L4 (PANSTARRS) [Re: aa6ww]
      #5725109 - 03/11/13 01:58 AM

No joy again tonight. I saw sunshine just before sunset, so I hoped for a clearing from the west, which the satellite image showed. But for the 40 minutes past sundown all we got was about a half-degree or clear along part of the horizon. Tomorrow is predicted clear, so I have my 10x50 and 20x80 binos all set. Good work to all who have seen and/or imaged it.
Clear skies and clean glass,
Mike


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aa6ww
professor emeritus
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Reged: 10/23/11

Loc: Sacramento, Calif.
Re: Comet C/2011 L4 (PANSTARRS) [Re: aa6ww]
      #5725111 - 03/11/13 01:59 AM Attachment (41 downloads)

Tonight I use my largest refractor, my 180mm F/6 APM "Comet Hunter" to observe PannStarr with. I spotted it with my 31 Nagler at 35x, at around 7:35pm here in Calif. It was above all the low lying clouds when I spotted it, and that gave me about 20 minutes before it dipped below some dark clouds. I slowly walked up the magnification to 154x using my 7 Nagler. It's a tough object to detect when the skies are hazy, especially to the west here in Northern Calif which over looks the Pacific. Best views were with my 22 and 17 Naglers at 50x to 63x at about 1.6 to 1.3 deg actual field of view.
PannStarr really needs some magnification to really appreciate its beauty though. Its a magnificent object to observe, its just very difficult to pick out of the low sky. It has a beautiful bright coma with plenty of glow around it at 150x. There seems to be a long trailing main tail and a shorter thinner one that's about 45 degs from the main tail, and thin, almost transparent whips between the two. I'm estimating tonight the main body of the tail was about 30 to 40 arc minutes long approaching maybe close to a full deg as it got darker. At higher magnifications you can just tell this object is just screaming through our solar system and ballistic speeds in how it appears. High power brings out more of the smaller thinner tail and the intense glow around the coma the astro photos aren't picking up because they tend to wash out the details in the coma, and the separation of the two tails.
I have 25x100 binoculars but PannStarr really needs more magnification to really see it and appreciate the beauty of how magnificent is really is.
Congratulations to everyone who observed it tonight.

...Ralph
38 deg latitude,
Sacramento.


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Jeremy Perez
Carpal Tunnel
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Reged: 08/12/04

Loc: Flagstaff, Arizona, USA
Re: Comet C/2011 L4 (PANSTARRS) [Re: aa6ww]
      #5725138 - 03/11/13 02:45 AM Attachment (34 downloads)

Bill, I think you might have been parked just up the road from me--I think I recognize some of the trees in your photo!

It's great to see all the northern hemisphere photos coming in.

We had a crystal clear sky for dusk this evening and I found a spot with a good view to the west on McMillan Mesa.

The comet finally came into view about 7:00 PM with the sun 7 degrees below the horizon and the comet 6 degrees above. It was a beautiful white fan over a gray-blue sky. The central condensation appeared elongated with the brightest section of the tail on the right (north) side. There was a hint of a fainter, shorter tail on the left (south) side. I roughly estimated overall visible length at around half a degree. I tried spotting it naked eye, but couldn't confirm a couple suspected glimpses.

While making sketches, I had a chance to share the view with a couple people who pulled over to take a look, including Kevin Mullins, planetary science professor at CCC. I also suspect Bill Ferris was just parked a couple hundred yards up the road.

As the comet began to set behind Mars Hill, it took on a ruddier color and shared an interesting, overlapping view with passing aircraft. As good as it looked through binoculars, it's got to look amazing through a telescope. So I'll have to try that next.

A bit more info/photos/sketches here: C/2011 L4 (PanSTARRS) - March 10/11, 2013


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james7ca
sage


Reged: 05/21/11

Re: Comet C/2011 L4 (PANSTARRS) [Re: Jeremy Perez]
      #5725224 - 03/11/13 04:39 AM

I was able to find PANSTARRS this evening (Sunday, March 10) from a location overlooking the Pacific Ocean and about 30 miles north of San Diego, California. My first sighting occurred at 7:26PM PDT using a pair of 7x50 binoculars (sunset was at 6:54PM). Shortly thereafter I observed the comet using an Astro-Tech AT72ED at magnifications of 18X and 43X. There is a bright core with a diffuse coma and a short tail (with optical aid, very much like some of the above photos).

I tracked the comet with the AT72ED until it "sank" into the ocean at just a few seconds before 7:55PM PDT (very, very close to the horizon line). There was noticeable haze and thin clouds near the horizon and yet the comet remained visible until about one minute before the predicted setting time of 7:56PM (estimate given by the iOS version of SkySafari Pro).

I never saw the comet without the binoculars or telescope, but I had the feeling that it wasn't too far from being visible to the naked eye (YMMV).


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Special Ed
Postmaster
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Reged: 05/18/03

Loc: Greenbrier Co., WV 38N, 80W
Re: Comet C/2011 L4 (PANSTARRS) [Re: james7ca]
      #5725342 - 03/11/13 08:19 AM

Hey,

Some great pics and reports and Jeremy, outstanding sketch. It looks like on the 10th we broke through the wall.

Cloudy here yesterday evening so I'm hoping the forecast for Thursday holds but we have to get through the next storm first.


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REC
Post Laureate
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Reged: 10/20/10

Loc: NC
Re: Comet C/2011 L4 (PANSTARRS) new [Re: Special Ed]
      #5725447 - 03/11/13 09:36 AM

Well from the last days posts, looks like it's finally here. Hope to see it here in NC on Wednesday after the rains.

Fun:) Bob


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BillFerris
Post Laureate
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Reged: 07/17/04

Loc: Flagstaff, Arizona, USA
Re: Comet C/2011 L4 (PANSTARRS) new [Re: Jay]
      #5725456 - 03/11/13 09:44 AM

Quote:

My COMTRAIL PanSTARRs was back again today. Brighter, and higher than yesterday and right in the area predicted by Starry Night Pro (just like yesterday March 9, 2013)

Thank you to those of you that gave me the benefit of the doubt yesterday.




Sunday evening, I was taking 3-exposure sets of the comet across a range from +2 stops overexposed to -2 stops under. While the on-meter shots worked best, the +2 stops over images confirmed that the comet's rate of motion due to Earth's rotation is brisk enough to cause the nucleus to blur. I ended up with several exposures in the 15-sec to 30-sec range and, in all, the nucleus appears as a linear feature.

This accounts for the appearance of the comet in the first image you posted of PanSTARRS setting over the pier. It wasn't a contrail; it was the comet.

Bill in Flag


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