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L. Regira
sage
Reged: 07/10/05
Posts: 260
Loc: Theriot, LA 29' 25"N; 90.46W
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With Burnham's in hand I was exploring Hercules. I viewed M13, Alpha Herculis, and finally Zeta Herculis. Once found, I cranked up the power to 433x in my 12.5 inch reflector and it was not split. I thought I had the wrong star so I double checked again and then upped the power to 866x and there it was. Talk about a tight double. I backed off to 747x and got a pleasing split with just barely black sky between the two stars. According to Burnham's, it varies from 0.4 to 1.6" separation. I would say it is close to 0.6 and a challenge right now for 8 inch and above scopes. Anyone else tried splitting Zeta?
Lawrence R.
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Cave Astrola 12.5"F5(1979)Refigured by Swayze(2002)
Sears #6332 Classic Teal blue 60mm F 11.7
8x12 Roll-Off Roof Observatory
RV-6 Dynascope (1975)(to be restored and upgraded)
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jandrew
sage
Reged: 05/31/03
Posts: 233
Loc: Winnipeg, Manitoba
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According to the data in the WDS Sixth Catalog of Orbits, Zeta Her has the
following PA and Sep for 2005-2009:
2005 226.1° 0.93"
2006 214.8° 1.01"
2007 204.9° 1.06"
2008 195.7° 1.09"
2009 186.8° 1.11"
However, with the magnitude difference from a 2.95 primary to a 5.4
companion, it will be a much harder split than just its separation might
lead one to believe. I haven't looked at this one this year, but I'll
give it a try with my 8" on the next steady night.
cheers,
andrew
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4.5" orbitor dob
8" skywatcher dob
Larrivee 6-string (oops, wrong instrument)
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L. Regira
sage
Reged: 07/10/05
Posts: 260
Loc: Theriot, LA 29' 25"N; 90.46W
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Thanks for the information. I may try to split it with my 6 inch reflector to see if I can.
Lawrence
--------------------
Cave Astrola 12.5"F5(1979)Refigured by Swayze(2002)
Sears #6332 Classic Teal blue 60mm F 11.7
8x12 Roll-Off Roof Observatory
RV-6 Dynascope (1975)(to be restored and upgraded)
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asteroid7
Post Laureate
Reged: 10/19/04
Posts: 4273
Loc: CT
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I had a questionable split on this one last year, using
8 in CPC with 320x.
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Clear Nights "Make My Day"
4.5" f/7 APM (TMB) APO Refractor CG5 GoTo with Orion extension tube
8" Celestron CPC (two)
Eyepieces:
40mm Pentax; 24mm Tele Vue Panoptic, 18mm Tele Vue Radian, 18mm HD Ortho, 15mm Celestron Omini,14mm Pentax,10mm Tele Vue Radian, 7mm,5mm & 3.5mm Nagler; 7.4mm Tele Vue Plossl.
2.5 Tele Vue Powermate
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