Struve 2069

Morgan Spangle
Star: Struve 2069
Date: 11 June 2006
Seeing: <1-10 Seeing Scale (10 best)>: 5
Transparency: <1-10 Scale (10 best)>: 7
Location of site: Larchmont, NY
Site classification: Bright suburuban
Conditions: Cool, breezy
Moon: Full
Sky darkness: 3.5
Telescope: 23.5cm SCT
Mount: Takahashi NJP Temma 2
Eyepieces: SBIG ST2000XM CCD camera Magnification: n/a

NAME SEP PA NOTES

35.2 81.6

      

Mike Sutherland
Star: Struve 2069
Date: 7 July 2006
Time: 11:00pm to 12:00pm PDT
Seeing: ~ 6 <1-10 Seeing Scale (10 best)>
Transparency: below average
Location of site:Beaverton Oregon, USA, 45 28N, 122 51W
Site classification: Suburban
Conditions: 62F, dry
Sky darkness: 3 <Limiting magnitude>
Telescope: Takahashi FS-128
Eyepieces: 30mm Ultima, 12mm ortho, 9mm ortho, 7mm ortho, 6mm ortho, 5mm LE, Barlow
Magnification: 35x, 87x, 116x, 149x, 173x, 208x

 		11:40pm PDT I could just make out the companion at 87x but it became very clear at 149x and 208x. A nice one to complete the evening. A weather system is passing through these days but I expect to get out and work on a few more nuts soon.


       

Wolfgang Vollmann
Star: Struve 2069
Date: 2006 July 6
Time: 21:00-23:00 UT
Seeing: 5 <1-10 Seeing Scale (10 best)>
Transparency: clear
Location of site: Vienna, Austria
Site classification: Suburban Sky
Conditions:
Moon:
Sky darkness: Naked eye limiting mag. 4.5
Telescope: 130/1040mm refractor
Eyepieces: n/a
Camera: SBIG ST237A
CCD Exposures: 6x10 seconds for astrometry and 6x1 seconds for distance/PA measurement.
Image measurement: astrometry with Astrometrica software and UCAC2 catalog (see http://www.astrometrica.at); with exact focal length and image orientation I measured distance and PA with AIP4WIN software. I took means of measuring all my images for a star. There is a scatter of 0.2 arcsec in separation and 0.2 deg in PA. Scatter in PA is much larger if the stars are very close.
Note: All images have north up and an image size of approximately 16x12 arc minutes

WDS 16364+3349 This one is in Hercules about 3 deg south of the great globular cluster M 13. The measures from the last 111 years show a steady increase in distance and PA -- is this an optical double? A bit south of the double my images show a nice 5 star figure.

Measures: STF2069 WDS: year 1895 / 26.6 arcsec / PA 72 deg WDS: year 2000 / 34.8 arcsec / PA 81 deg My measure: year 2006.52 / 35.2 arcsec / PA 81.6 deg


         

Richard Jepeal
Star: Struve 2069
Date: July, 14th, 2006
Time:---
Seeing: 6-7/10
Transparency: ---
Location of site: New Britain, Connecticut
USA
Site classification: Urban
Conditions: ----
Sky darkness: ---
Telescope: 8in Celestron Nexstar
Eyepieces: ---
Magnification: 53x to 228x

 Secondary is a wisp/dot of light a good distance from the medium-light yellow primary.
 
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