Anybody know what the separation for Gamma Virginis will be in 2010? I had some fun splitting double stars the other night and would like to see this one again. I barely split Zeta Aqr which is about 2 arc seconds wide. The seeing was pretty good early in the evening but degraded later so I packed up and was home by 10 pm. Debbie
I googled Gamma Virginis and the first hit was a wiki page http://en.wikipedia.org/wiki/Gamma_Virginis It says .9 arc seconds for 2010. But that's based on an orbit calculated in 1937. DT --- On Fri, 11/6/09, Debbie <astrodeb@beyondbb.com> wrote:
From: Debbie <astrodeb@beyondbb.com> Subject: [Utah-astronomy] Gamma Virginis To: utah-astronomy@mailman.xmission.com Date: Friday, November 6, 2009, 9:46 AM
Anybody know what the separation for Gamma Virginis will be in 2010? I had some fun splitting double stars the other night and would like to see this one again.
I barely split Zeta Aqr which is about 2 arc seconds wide. The seeing was pretty good early in the evening but degraded later so I packed up and was home by 10 pm.
Debbie
_______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Visit the Photo Gallery: http://www.slas.us/gallery2/main.php Visit the Wiki: http://www.utahastronomy.com
See http://www.dibonsmith.com/orbits.htm for the orbits of 150 visual binaries including Gamma Virginis. According to the orbit shown there, Gamma Virginis should have a separation of about 1.5" in 2010. The key to splitting close doubles is good seeing and high power. I was able to split Eta Corona Borealis with my 8" Ultima at 400-800x last year even though it had only 0.5" separation. At 400X it was difficult but at 800X it was easily visible. This is one area where high power is essential. Doubles like Eta CrB that have equal components are much easier to split than unequal magnitude doubles. Don -----Original Message----- From: utah-astronomy-bounces@mailman.xmission.com [mailto:utah-astronomy-bounces@mailman.xmission.com] On Behalf Of daniel turner Sent: Friday, November 06, 2009 11:04 AM To: Utah Astronomy Subject: Re: [Utah-astronomy] Gamma Virginis I googled Gamma Virginis and the first hit was a wiki page http://en.wikipedia.org/wiki/Gamma_Virginis It says .9 arc seconds for 2010. But that's based on an orbit calculated in 1937. DT --- On Fri, 11/6/09, Debbie <astrodeb@beyondbb.com> wrote:
From: Debbie <astrodeb@beyondbb.com> Subject: [Utah-astronomy] Gamma Virginis To: utah-astronomy@mailman.xmission.com Date: Friday, November 6, 2009, 9:46 AM
Anybody know what the separation for Gamma Virginis will be in 2010? I had some fun splitting double stars the other night and would like to see this one again.
I barely split Zeta Aqr which is about 2 arc seconds wide. The seeing was pretty good early in the evening but degraded later so I packed up and was home by 10 pm.
Debbie
_______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Visit the Photo Gallery: http://www.slas.us/gallery2/main.php Visit the Wiki: http://www.utahastronomy.com
_______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Visit the Photo Gallery: http://www.slas.us/gallery2/main.php Visit the Wiki: http://www.utahastronomy.com
It seems the position angle and separation of doubles is somewhat sketchy, it seems it is something amateurs don't regularly log. I think this is something that amateurs can contribute to the science. I have gotten into the habit of orienting N/S and E/W in the eyepeice by moving RA and Dec until it becomes clear.
I googled Gamma Virginis and the first hit was a wiki page
http://en.wikipedia.org/wiki/Gamma_Virginis
It says .9 arc seconds for 2010. But that's based on an orbit calculated in 1937.
DT --- On Fri, 11/6/09, Debbie <astrodeb@beyondbb.com> wrote:
From: Debbie <astrodeb@beyondbb.com> Subject: [Utah-astronomy] Gamma Virginis To: utah-astronomy@mailman.xmission.com Date: Friday, November 6, 2009, 9:46 AM
Anybody know what the separation for Gamma Virginis will be in 2010? I had some fun splitting double stars the other night and would like to see this one again.
I barely split Zeta Aqr which is about 2 arc seconds wide. The seeing was pretty good early in the evening but degraded later so I packed up and was home by 10 pm.
Debbie
_______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Visit the Photo Gallery: http://www.slas.us/gallery2/main.php Visit the Wiki: http://www.utahastronomy.com
_______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Visit the Photo Gallery: http://www.slas.us/gallery2/main.php Visit the Wiki: http://www.utahastronomy.com
--- On Sat, 11/7/09, erikhansen@TheBlueZone.net <erikhansen@TheBlueZone.net> wrote:
From: erikhansen@TheBlueZone.net <erikhansen@TheBlueZone.net> I have gotten into the habit of orienting N/S and E/W in the eyepeice by moving RA and Dec until it becomes clear.
You can do the same with a dobsonian by noting the the direction of travel of the star with an undriven telescope is to the west. Clockwise from West is South East and then North. DT
participants (4)
-
daniel turner -
Debbie -
Don J. Colton -
erikhansen＠TheBlueZone.net