Struve 1857

Steve Bodin
Star: Struve 1857
 Date & Time: 26 May 2005, 10pm to midnight
Seeing: 5-6/10, degrading to 4/10
Transparency: fair
Location of site: Silverdale Wa, USA, 47N,123W
Site classification: Suburb
Conditions: 55F, no wind, dry
Sky darkness: limiting mag 5.6
Moon:
Telescope: Celestron C8
Eyepieces: not used
Imaging: DX8263SL video camera at prime focus, and 3x
Magnification: app. 333x, 1000x

 Had enough of the degrading conditions and switched to prime focus. This
faint unequal pair was composed of a nice yellow primary and blue companion.
 
Measured, 16.88 sec at 351.6 deg PA. This is conciderably different from the
posted measure, but that was from 1903, so maybe 100 years have been
sufficient for this difference. Or maybe I was on the incorrect star, will
have to investigate.
 


  

Alessandro Bertoglio
Star: Struve 1857
Date & Time: 27 May 2005 21.50 UTC
Seeing: IV Antoniadi
Transparency:
Location of site: Turin, Italy, 4504N 0742E
Site classification: Urban area with strong light pollution
Conditions: clear, no wind, mild temperature, little hazy
Moon: none
Sky darkness: 2.5-3 (limiting magnitude)
Telescope: Takahashi Mewlon 300, Dall-Kirkham 300/3572 reflector
Mount: 10 Micron GM2000 with FS2 controller
Eyepieces: Televue Plossl 8 mm.
Magnification: 447X
Diagonal: Yes, Televue 2" Everbrite

Difficult pair: the secondary star is quite faint and this night is not sufficiently transparent although the separation is more than sufficient. The primary star is fairly bright, yellowish maybe with orange tone. The secondary is very fainter and is difficult to detect with direct vision. No visible rings. Extimated PA about 345-350 degrees. If I must strain my eyes I want to do it observing more interesting stars!!

 
 

           

Morgan Spangle
Star: Struve 1857
Date & Time: May 29-30, 2005
Seeing: 4/5
Transparency: 2/5
Location of site: Larchmont, NY
40 55N 73 44W
Site classification:
Conditions: steady, calm, high haze, passing clouds
Sky darkness:
Telescope: Borg 101ED fl: 640mm
CCD Camera: ST237A, 2.39 pixels/arcsec
FOV 25 x 19'
Eyepieces:
Magnification:

 16.5" - 352.1 DEG
 


William Schart
Star: Struve 1857
Date & Time: June 11, 2005
Seeing: Steady
Transparency:
Location of site: Texas,USA
Site classification: Suburban
Sky darkness:
Moon: crescent moon
Telescope: Celestron C8
Eyepieces:
Magnification:
Negative report. Never saw any pair. It may be the m11.3 secondary was too faint.

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