Struve 305

Steve Bodin
Star: Struve 305
Date & Time: 27 October 2005, midnight to 1 am local
Seeing: 3/10
Transparency: good
Location of site: Mattawa WA, USA 46N 119W
Site classification: rural
Conditions: temp 40F, no wind
Sky darkness: limiting mag 6.5
Telescope: Meade 16 LX200GPS
Eyepieces: not used
Imaging: DX8263SL video camera at prime focus
Magnification: app. 600x

 Nice primary pair, but the C star is extremely faint, maybe 13th or more. Primary pair listed in the WDS with a preliminary orbit solution, a true binary. Measured, AB 3.65 sec at 307.9 deg PA, AC 94.5 sec at 023.9 deg PA.
 


  
  

Florent Losse
Star: Struve 305
Date & Time: Nov 05-06/06-07th, 2005
Time:
Seeing: 7 out of 10
Transparency:  out of 10
Location of site: 4433N 0012W 
Site classification: Rural
Conditions:
Sky darkness: limiting mag = maybe 2/3 at very best, <0 at worst !
Telescope:
- visual : 120mm refractor used as guidescope 
- imaging : homemade Newton 8", Barlow 3x with tube extender, Audine K400 (sampling 0"32/px) 
Eyepieces: 20mm,7.5mm 
Reductions: Reduc V3.49

A very light wind is blowing during some minutes. The haze is
immediately less thick but it didn't last long :(
Clearly splitted with the refractor and a 20mm eyepiece.
Measurement : 308°1 / 3"56.
Far from ephemerides o-c : +1°4 / -0.15 (Rab1961a)
 

      

Morgan Spangle
Star: Struve 305
Date & Time: 11/19/2005 (CCD Observing), 25 November 2005 (Visual)
Seeing:
Transparency:
Location: Larchmont, NY  40.55N 73.44W
Site classification:  Suburban
Conditions: Cold, dry, thin high haze; moonless; steady air
Sky darkness:
Telescope:
C9.25 SCT f/10 (CCD: ST2000XM)
Borg 125ED f/6.4 800mmfl (visual)
Mount: Tak NJP Temma 2
Eyepieces: 30, 24, 18, 12.5, 7.5, 5mm Celestron Ultima, in turret.
UO Klee 2.8x barlow
Magnification:

Measured: AB / 4.7 / 295.9
AC / 94.5 / 334.0

   
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