Struve 381


Axel Tute
Star: Struve 381
Date & Time: 13-10-05, 21:30 UT
Seeing: 8 out of 10
Transparency: 9 out of 10
Location of site: Küssaberg-Dangstetten
Germany / 47°36, 8°21

Site classification: Rural
Conditions: no wind, high humidity
Sky darkness: 4mag (moon)
Telescope: Celestron 8
Eyepieces: 26mm Plössel, 12mm RKE
Diagonal: Yes
Magnification: 77x
 
 
Star: Struve 381
Date & Time: 26-10-05
Time:
19:25 UT
Seeing: 6 out of 10
Transparency: 6 out of 10
Location of site: Küssaberg-Dangstetten
Germany / 47°36, 8°21

Site classification: Rural
Conditions: no wind, high humidity
Sky darkness: better than 5mag
Telescope: Celestron 8
Eyepieces: 26mm Plössel
Diagonal: Yes
Magnification: 77x

No chance to split with the 26mm Plössel.

With the 12mm RKE (167x) I could split, with a little black space between them. No colours.

I was astonished how easy my scope splits Struve 381. Okay, I worked a lot on it (fans, etc.) and generally before I start with the observations I check the calibration.
 
   
 
 
 
 
26mm Plössel (77x): I couldn´t split.
12mm RKE (167x): Sometimes I think that I can see two stars for a short time. But than I can see only one star or they look like an eight.
8mm RKE (250x): See 12mm RKE.
No webcam photo !
 
 
  

Steve Bodin
Star: Struve 381
Date & Time: 7 November 2005, 11pm to midnight local
Seeing: 3/10
Transparency: good
Location of site: Mattawa WA, USA 46N 119W
Site classification: rural
Conditions: temp 34F, light wind
Sky darkness: limiting mag 6.5
Telescope: Meade 16 LX200GPS
Eyepieces: not used
Imaging: DX-8263SL color video camera at prime focus and 3x and 4x
Magnification: app. 600x, 1800x, 2400x

Another difficult close pair, needed 3x barlow to split and then it was only suspected in real time viewing. Found 20 good frames and measured; 1.03 sec at 108.1 deg PA.
 

 
   

Florent Losse
Star: Struve 381
Date & TimeNov 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 darknesslimiting 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

Clearly ... not split at any magnification with the 120mm. Far
undersampled at 6 meters of EFL to try something on the frames.
    

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