Return to the Cloudy Nights Telescope Reviews home page


Observing >> Solar System Observing

Pages: 1
Tonk
Postmaster
*****

Reged: 08/19/04

Loc: Leeds, UK, 54N
Long lost comet Pons-Gambart has been recovered! new
      #5549831 - 12/02/12 06:10 AM

This comet was last observed by Pons in 1827 at around mag 8!

The orbital period appears to be around 62 years so we have missed two subsequent returns until now.
Robert Matson has just reported an object as SWAN12B, now comfirmed as a comet with designation C/2012 V4 (CBET 3320) and also confirmed as D/Pons-Gambart

It is unfortunately (for me) currently in southern Sagittarius and below the horizon by the time the sun sets. It is heading north but perihelion is around 19th December and after that time the comet fades as it climbs north.

Harvard ephemeris

Code:

Date TT R. A. (2000) Decl. Delta r Elong. Phase m1 m2
2012 11 29 19 16 44.2 -29 36 19 1.3714 0.8890 40.3 45.9 11.7
2012 11 30 19 15 49.3 -28 48 16 1.3897 0.8812 39.1 44.9 11.7
2012 12 01 19 14 55.9 -28 01 26 1.4079 0.8738 37.9 43.9 11.7
2012 12 02 19 14 03.6 -27 15 45 1.4258 0.8666 36.7 42.8 11.6
2012 12 03 19 13 12.4 -26 31 12 1.4435 0.8598 35.5 41.8 11.6
2012 12 04 19 12 22.1 -25 47 41 1.4609 0.8533 34.4 40.7 11.6
2012 12 05 19 11 32.6 -25 05 11 1.4779 0.8471 33.2 39.5 11.6
2012 12 06 19 10 43.9 -24 23 38 1.4946 0.8413 32.0 38.4 11.6




But congrats to Robert anyway for recovering a long lost comet!

Its currently 4th on this list of lost comets (soon to be removed!)

CometHunter lost comet list


Post Extras: Print Post   Remind Me!   Notify Moderator  
RobK
sage


Reged: 07/06/08

Loc: Bright, Vic, Australia
Re: Long lost comet Pons-Gambart has been recovered! new [Re: Tonk]
      #5549882 - 12/02/12 07:22 AM

The comet appears to be considerably brighter visually than the ephemeris magnitude and was an easy get in my 4.5" f8 reflector at 43x after twilight tonight. Small, around an arcminute in diameter, maybe a bit more in averted vision. Condensed but the bright inner coma eluded me. Visual mags of 9.4 and 9.3 have been reported. Quite reasonable although I felt it might have been slightly fainter than that. Photographically it's bright and a lovely green colour - my (rough) image from tonight is here:
http://i727.photobucket.com/albums/ww271/Rob_Kau/C2012V42Dec2012text.jpg

Amazing to eyeball something that hasn't been seen since 1827! If you have it in your skies, don't miss the opportunity to see it!

Cheers -

Rob


Post Extras: Print Post   Remind Me!   Notify Moderator  
Tonk
Postmaster
*****

Reged: 08/19/04

Loc: Leeds, UK, 54N
Re: Long lost comet Pons-Gambart has been recovered! new [Re: RobK]
      #5549884 - 12/02/12 07:26 AM

The Harvard magnitudes are always well below what is observed in my experience!

Rob you have the luck to be in the southern hemisphere for this one!


Post Extras: Print Post   Remind Me!   Notify Moderator  
Tonk
Postmaster
*****

Reged: 08/19/04

Loc: Leeds, UK, 54N
Re: Long lost comet Pons-Gambart has been recovered! new [Re: Tonk]
      #5555147 - 12/05/12 05:42 AM

There has just been an MPC update on this comet

http://www.minorplanetcenter.net/mpec/K12/K12X14.html

From analysis of the comet astrometry this time round it seems that the comet has a 188 year orbit and this is indeed the first return of Pons-Gambart since 1827


Post Extras: Print Post   Remind Me!   Notify Moderator  
Asbytec
Guy in a furry hat
*****

Reged: 08/08/07

Loc: La Union, PI
Re: Long lost comet Pons-Gambart has been recovered! [Re: Tonk]
      #5555151 - 12/05/12 06:07 AM

I offer my congratulations to Robert for some fine work. Bravo.

Post Extras: Print Post   Remind Me!   Notify Moderator  
Pages: 1


Extra information
5 registered and 8 anonymous users are browsing this forum.

Moderator:  Rich (RLTYS), star drop, Mitchell Duke 

Print Thread

Forum Permissions
      You cannot start new topics
      You cannot reply to topics
      HTML is disabled
      UBBCode is enabled


Thread views: 995

Jump to

CN Forums Home




Cloudy Nights Sponsor: Astronomics