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Dave Mitsky
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Reged: 04/08/02

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Re: Comet C/2011 L4 (PANSTARRS) [Re: BrooksObs]
      #5710693 - 03/03/13 01:53 PM

There's an image of Comet PanSTARRS posted at http://spaceweather.com/gallery/indiv_upload.php?upload_id=77134 that may be the first one captured from the northern hemisphere.

Dave Mitsky


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Tonk
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Reged: 08/19/04

Loc: Leeds, UK, 54N
Re: Comet C/2011 L4 (PANSTARRS) [Re: Dave Mitsky]
      #5710799 - 03/03/13 02:55 PM

Quote:

may be the first one captured from the northern hemisphere




Ah the IR filter trick


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Ptarmigan
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Reged: 09/23/04

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Re: Comet C/2011 L4 (PANSTARRS) [Re: Tonk]
      #5711190 - 03/03/13 06:35 PM

Comet PANSTARRS is at magnitude 2.3.

http://www.skyandtelescope.com/observing/highlights/185665152.html

Edited by Ptarmigan (03/03/13 06:38 PM)


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Yaar
sage


Reged: 02/18/09

Loc: 24.94N
Re: Comet C/2011 L4 (PANSTARRS) [Re: Ptarmigan]
      #5711870 - 03/04/13 01:58 AM

The daytime skies here in Karachi have been a beautiful crisp blue and the night time skies wonderfully transparent since February's last week. Eagerly looking ahead to the evening sightings of the comet.

Haven't been able to edit the ssystim.ini file within the <Documents&settings\<username>\application data\stellarium\data> folder because the parent folder is locked and I cannot open it, so not exactly sure when PanSTARRS would first appear above the horizon at dusk from my city (24.9 N). Anyway I hope the excellent skies all the way to the horizon continue to be around.

I have a cross-country flight scheduled for the 10th around dusk Trying to secure a left window side seat on that 747, because it would be facing west

I've already seen the Milky Way, Omega Centauri and a meteor from an airplane window: http://dawn.com/2013/02/16/is-it-a-plane-is-it-a-ufo-no-it-is-the-iss/ Comet PanSTARRS would be a very nice addition to the list. Let's see how it goes.


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Dave M
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Re: Comet C/2011 L4 (PANSTARRS) [Re: RobK]
      #5712275 - 03/04/13 10:52 AM

Beautiful shot Rob..
I cant wait to see it here up North ..


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tezster
scholastic sledgehammer
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Reged: 07/14/09

Loc: Missisauga, Canada
Re: Comet C/2011 L4 (PANSTARRS) [Re: Dave M]
      #5712366 - 03/04/13 11:53 AM

I really hope the comet keeps getting brighter (or at the very least, stays at around mag two-ish) for the next couple of weeks

Edited by tezster (03/04/13 11:54 AM)


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c_lou
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Reged: 08/02/04

Loc: West Central, WI
Re: Comet C/2011 L4 (PANSTARRS) [Re: tezster]
      #5712728 - 03/04/13 03:21 PM

I would be happy with a mag 2-ish comet. My girls would get to see their first naked eye comet.

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dan777
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Reged: 11/16/07

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Re: Comet C/2011 L4 (PANSTARRS) [Re: Yaar]
      #5712860 - 03/04/13 04:34 PM

Quote:

Haven't been able to edit the ssystim.ini file within the <Documents&settings\<username>\application data\stellarium\data> folder because the parent folder is locked and I cannot open it, so not exactly sure when PanSTARRS would first appear above the horizon at dusk from my city (24.9 N).




You no longer have to add orbital elements manually. You can go to Configuration Window, Plugins, Solar System Editor, Solar System, Add new solar system objects.


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Yaar
sage


Reged: 02/18/09

Loc: 24.94N
Re: Comet C/2011 L4 (PANSTARRS) [Re: dan777]
      #5713259 - 03/04/13 08:11 PM Attachment (31 downloads)

Thanks a bunch Dan! It worked. Here are the elements I'm using:

[PANSTARRS]
name = C/2012 L1 (PANSTARRS)
parent = Sun
radius = 10
oblateness = 0.0
halo = true
color = 1.0,1.0,1.0
tex_halo = star16x16.png
tex_map = nomap.png
coord_func = comet_orbit
orbit_TimeAtPericenter = 2456329.3937
orbit_PericenterDistance = .337628
orbit_Eccentricity = 1.0
orbit_ArgOfPericenter = 331.2931
orbit_AscendingNode = 67.5247
orbit_Inclination = 59.95487
lighting = false
albedo = 1
orbit_visualization_period = 365.25

But it seems that Stellarium is plotting the comet one month ahead of where it should be. The 5th Feb position is perhaps where it should be on 6th or 7th March, no?


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Tonk
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Loc: Leeds, UK, 54N
Re: Comet C/2011 L4 (PANSTARRS) [Re: Yaar]
      #5713344 - 03/04/13 08:45 PM

Newton would weep at that path!

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dan777
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Reged: 11/16/07

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Re: Comet C/2011 L4 (PANSTARRS) [Re: Yaar]
      #5713688 - 03/05/13 12:24 AM

Quote:

But it seems that Stellarium is plotting the comet one month ahead of where it should be.



I think you're getting C/2011 L4 PanStarrs mixed up with C/2012 L1 Linear


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AlaskaIsCold
member


Reged: 11/16/11

Loc: San Diego, CA
Re: Comet C/2011 L4 (PANSTARRS) [Re: Dave M]
      #5713796 - 03/05/13 02:45 AM

I am hoping that I can image it with my Wide Field Newtonian.
610mm 6" should be zoomed in enough to see something (Hopefully not -too- close up) If I can see something -really- good then I get to break out the 4x5 with the 90mm equiv. lens and hope for the best.


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BrooksObs
professor emeritus


Reged: 12/08/12

Re: Comet C/2011 L4 (PANSTARRS) [Re: Yaar]
      #5714172 - 03/05/13 10:48 AM

Quote:

Thanks a bunch Dan! It worked. Here are the elements I'm using:

[PANSTARRS]
name = C/2012 L1 (PANSTARRS)
parent = Sun
radius = 10
oblateness = 0.0
halo = true
color = 1.0,1.0,1.0
tex_halo = star16x16.png
tex_map = nomap.png
coord_func = comet_orbit
orbit_TimeAtPericenter = 2456329.3937
orbit_PericenterDistance = .337628
orbit_Eccentricity = 1.0
orbit_ArgOfPericenter = 331.2931
orbit_AscendingNode = 67.5247
orbit_Inclination = 59.95487
lighting = false
albedo = 1
orbit_visualization_period = 365.25

But it seems that Stellarium is plotting the comet one month ahead of where it should be. The 5th Feb position is perhaps where it should be on 6th or 7th March, no?




Little surprise, Yaar, that Stellarium is giving falses positions in that every one of the orbital elements you've listed is inaccurate for C/2011 L4. In fact, the orbital inclination value is tens of degrees off and even the name you indicate is incorrect! The bright Comet PanSTARRS C/2011 L4, not L1.

I don't know where you might have obtained these elements, but in the future I'd certainly not rely on that site again for elements!

BrookObs


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Yaar
sage


Reged: 02/18/09

Loc: 24.94N
Re: Comet C/2011 L4 (PANSTARRS) [Re: BrooksObs]
      #5714263 - 03/05/13 11:38 AM

Thank you Dan and BrooksObs. I copied the (mixed-up) elements from this forum and also from the SourceForge.net forums. I'm glad you guys caught the embarrassing error.

Now I opened the configuration window and under the "Solar System tab" of the "Solar System objects" window, clicked the "Import orbital elements in MPC format" button at the bottom of the tab. An "import data" window opens. Under the "Lists" tab of the "Import data" window, I selected the "Type" as "Comets" and the "Source" as "Download a list of objects from the internet"; under "Or select from the list" I chose "Select bookmark" and then "MPC's list of observable comets," and then clicked the button "Get orbital elements."
A list of objects found was loaded. Scrolled down and checked PanSTARRS (the correct one!) and ISON.

Thanks for the help guys PanSTARRS is already above our horizon at dusk but it still very low.


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Tonk
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Reged: 08/19/04

Loc: Leeds, UK, 54N
Re: Comet C/2011 L4 (PANSTARRS) [Re: Yaar]
      #5714369 - 03/05/13 12:35 PM

I'd suggest that you get orbital elements from MPC direct and not secondhand mangled data

The index for all comets is here http://minorplanetcenter.org/iau/Ephemerides/Comets/index.html

and from the list - C/2011 L4 (Pan-STARRS) - http://scully.cfa.harvard.edu/cgi-bin/returnprepeph.cgi?d=c&o=CK11L040

and files that hold the full MPC comet list can be uploaded from here for various software packages - http://www.minorplanetcenter.net/iau/Ephemerides/Comets/SoftwareComets.html


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nytecam
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Reged: 08/20/05

Loc: London UK
Re: Comet C/2011 L4 (PANSTARRS) [Re: RobK]
      #5714394 - 03/05/13 12:46 PM

Beautiful image Rob - best I've seen - I love the dark sky

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cpsTN
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Re: Comet C/2011 L4 (PANSTARRS) [Re: Dave Mitsky]
      #5714588 - 03/05/13 02:29 PM

According to the picture taker, it was taken at NOON in France. This would make it about 6am EST the same day. He said is was "only visible during the day".

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Tonk
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Re: Comet C/2011 L4 (PANSTARRS) [Re: cpsTN]
      #5714603 - 03/05/13 02:35 PM

Quote:

He said is was "only visible during the day".




Yeah figures as in N hemi on that date comet rose after sun and set before sun


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OldDeadOne
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Loc: West Virginia
Re: Comet C/2011 L4 (PANSTARRS) [Re: Tonk]
      #5714641 - 03/05/13 02:57 PM

A corrected one needs to be made for stellarium...or what do I need to replace to make it correct?

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drbyyz
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Re: Comet C/2011 L4 (PANSTARRS) [Re: tezster]
      #5715115 - 03/05/13 06:58 PM

Quote:

I really hope the comet keeps getting brighter (or at the very least, stays at around mag two-ish) for the next couple of weeks




Sky and Telescope now reporting that it looks likely to be brighter than mag 2 on Mar. 10th. Scouting out a good viewing location now! Just hoping the weather cooperates at least one or two days from the 10th onward, I'd like to get one night in of observing/sketching it and another night of imaging it.


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