Struve 3116

Steve Bodin
Star: Struve 3116
Date & Time: 5 Feb 2006, 10pm to midnight
Time:
Seeing: 4-5/10
Transparency: poor, ring around the moon
Location of site: Mattawa Wa, USA
46.9N,119.9W
Site classification:  Rural
Conditions: 35F, no wind, dry
Sky darkness: limiting mag 4.5 due moon
Telescope: Meade 16 inch LX200GPS UHTC
Eyepieces: not used
Imaging: DX8263SL video camera at f5 with reducer and 3x barlow
Magnification: app. 300x ,900x

 Another challenging triple, but the C star is not in Struve's list, rather cataloged as FOX 146. Primary pair is a difficult, close unequal pair, four magnitude different! A star seems whitish and B is blue, C too faint to tell. Measurement: AB 3.99 sec at 020.7 deg PA, AC 56.21 sec at 272.4 deg PA.
 

 
    

Florent Losse
Star: Struve 3116
Date & Time: 2-3 and 5-6 02/2006
Seeing: 4 to 6 of 10
Transparency: good
Location of site: 4433ºN, 0012ºW, France
Site classification: Rural
Conditions: 
Sky darkness: m lim = 6
Telescope: Homemade Newton 8" at F/30
Eyepieces: Not used
Imaging device: Audine CCD (KAF400)
Imaging software: Pisco
Reduction: Reduc v3.62

Really a nightmare. I looked at it too far after the transit and the couple was too low in the turbulence. I spent much time trying many settings but the camera doesn't like these bright stars giving much of smearing when imaging at video rate. Too few acceptable frames to give a measurement. To be checked in better conditions.
 


    

Richard Jepeal
Star: Struve 3116
Date: 7 Feb 2006
Time: 6:00pm (EST) to 10:20pm (EST)
Seeing: 6/10
Transparency:
Location of site: New Britain, Connecticut
USA
Site classification: Urban
Conditions: Periods of thin clouds
Sky darkness: 9 day old moon
Telescope: 8in Celestron Nexstar
Eyepieces: 10mm (Radian), 14mm (Pentax), 18mm (Radian),
24mm (Panoptic)
Magnification:

Scattered thin clouds in the area.  Used 145x to spot the somewhat close 4.0" secondary.  Primary whitish.
 
    

Axel Tute
Star: Struve 3116
Date & Time: 14-03-06
Time: 18:00 UT
Seeing: 8 from 10
Transparency: 6 from 10
Location of site: Kössaberg-Dangstetten
Germany / 47º36N, 8º 21E
Site classification: Rural
Conditions:  no wind, hazy skies
Moon: full moon
Sky darkness: Bortle 4
Telescope: Celestron 8
Diagonal: Yes
Eyepieces: 12mm RKE
Magnification: 167x
  
The little companion could just be seen in the 12mm RKE. Very nice pair in an interesting star field. No color.

       
          
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