Struve 1909


Ian Coster
Star: Struve 1909
Date: 07/06/06
Time:
23:10 UT
Seeing: 3/5
Transparency: 3/5
Location of site: London
Lat: 51:27:54N, Lon: 0:16:36W

Site classification: Suburban
Conditions
:
High hazy cloud
Moon: Waxing Moon near full
Sky darkness: Mag4 Sky (ZLM)
Telescope: Orion Optics 200mm F6
Eyepieces: 9mm Ortho
Barlow: Yes
Magnification: x267
   

Comments Primary Colour: Yellow Secondary Colour: yellow/orange

General Notes: single star in 18mm, Elongated in 9mm. This is a tougher split than STF1890 due to magnitude difference between the components. No field stars visible at x267.

 
      

Richard Jepeal
Star: Struve 1909
Date: Jun, 2006
Time:---

Seeing: ---
Transparency: ---
Location of site: New Britain, Connecticut
USA

Site classification: Urban
Conditions: ----
Sky darkness: ---
Telescope: 8in Celestron Nexstar
Eyepieces: ---
Magnification
:



 

Alessandro Bertoglio
Star: Struve 1909
Date: 14 June 2006
Time:
20.22 UTC
Seeing: III - IV Antoniadi
Transparency: ---
Location of site:Turin, Italy, 4504N 0742E
Site classification: Urban area with strong light pollution
Conditions
:
clear, foggy, no wind, warm temperature
Moon: no moon
Sky darkness: 3 (limiting magnitude)
Telescope: Takahashi Mewlon 300, Dall-Kirkham 300/3572 reflector
Mount: 10 Micron GM2000 with FS2 controller
Eyepieces: Televue Plossl 8 mm.
Diagonal: Yes, Televue 2" Everbrite
Magnification: 447X

Easy couple but already rather close, formed by pretty bright stars. The primary is whitish with some yellowish reflexes. The secondary one is a little more dim (few tenth of magnitude, I estimated) and slightly more white than the primary. The rings seem in contact. PA estimated about 50 degrees. Really a nice and interesting pair for medium instruments.

 
       

William Schart
Star: Struve 1909
Date: 6/19/06
Time:
10:36 PM
Seeing: 4 out of 5
Transparency:
Location of site: Columbia, USA
Site classification: Suburban
Conditions
:
warm
Sky darkness
:
around mag 5 (LM)
Telescope: C8
Eyepieces: 25 and 10 mm
Magnification
Split at high power. Quite yellow.

 
       

Brian McInnerny
Star: Struve 1909
Date: 2006 June 30/ July 1
Time:
2355UT
Seeing: 5/10 (10 best)
Transparency: Hazy
Location of site: SW England Site
Site classification: Suburban Sky
Conditions
:

Moon:
Sky darkness Naked eye Limiting mag:
Zeta Boo=3.8

Telescope: ETX 90EC (90mm)
Eyepieces:
Magnification
:


Not truely split at x96 but clearly oval in shape. Tried other magnifications,no improvement. Quoted as 2"arc, with the above sky conditions it is not supprising I could not split.Stars, white/white

 
       

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