17 Coma

Steve Bodin
Star: 17 Comae Berenices
Date & Time: 13 Mar 2005, 10 pm to 11 pm local
Seeing: 4-5 <1-10 Seeing Scale (10 best)>
Transparency: good
Location of site: Silverdale Wa, USA 47N,123W
Site classification: suburb-rural
Conditions: temp 41F, dry no wind
Moon:
Sky darkness: 5.6 <Limiting magnitude> 
Telescope: C8
Eyepieces: no used
Magnification: appx. 333x
Camera: DX8263SL video camera at prime focus
 
Very wide pair, easy in the finder. WDS has a close, 1.8 sec, component at 14th mag listed to the secondary, but this probably has a DI of 800 to all amateur scopes. Measured at 143.8 sec at 250.1 deg PA.
 
 



  


Louis Marchesi
Star: 17 Comae Berenices
Date & Time: 17 April 2005 2:00 to 5:00 UTC
Seeing: Pickering 6
Transparency: Average
Location of site: New London Township, PA, US
(+39d45m,-75d52m)
Site classification: Suburban/Rural
Conditions: Clear, calm, 6C (43F)
Sky darkness: Not determined
Moon: 55% (8.1 days old) waxing gibbous
Telescope: TMB152 f/7.9 Apochromatic Refractor
Mount: Losmandy G-11
Eyepieces: 17mm Nagler, 5mm TMB Super Monocentric
Magnification: 71x, 240x

 		This pair is probably a very nice binocular pair. Both stars were white and extremely widely separated at 71x. The B star is itself a tight double (Burnham 1080; 7+14.7, 1”.80) which obviously I could not see. Perhaps someone with a larger telescope and excellent conditions could split this one.

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