33 Doubles Observing Projects: Struve 3055

Struve 3055

Mike Sutherland

Star: Struve 3055
Date: 21 October 2006
Time: 9:20pm PDT
Seeing: about 5/10
Transparency: average
Location: Beaverton Oregon, USA
Site classification: Suburban
Conditions: 56F, dry
Sky darkness: limiting mag 3
Telescope: Takahashi FS128
Eyepieces: 9mm orthoMagnification:116x

Very wide, uninteresting pair. Perhaps more exciting in binoculars.
Ambiance: On this night it was a little windy but rather warm for October, 56º Fahrenheit

Steve Bodin

sdbodin@hotmail.com

Star: Struve 3055
Date: 22 Oct 2006
Time: 9 to 11pm
Seeing: 4-5/10
Transparency: fair
Location: Mattawa Wa, USA, 46.7N,119.9W
Site classification: Rural
Conditions: 48F, no wind, dry
Sky darkness: limiting mag 6.5
Telescope: Meade 16 inch LX200GPS UHTC
Eyepieces: not usedImaging: DX8263SL video camera at f10 and f30
Magnification: app.600x and 1800x

Another star that is multiple, but the project star is the AC pair. The AB pair is again an old friend, measured 5.66 sec at 359.8 deg. PA, The AC pair 121.6 sec at 031.7 deg PA.

Wolfgang Vollmann				vollmann@gmx.at
Star: Struve 3055 Date: 22 Oct 2006 Time: Seeing: 5/10 (10 best) Transparency: clear `Location:` Vienna, Austria Site classification: Suburban Conditions: Sky darkness: Naked eye limiting mag. 4.5 Telescope: 130/1040mm refractor Eyepieces: `Imaging:` SBIG ST237A CCD `Magnification:`Note: All images have north up Please follow the links to see the images!				This nice unequal triple system was imaged with 10s exposures: http://static.flickr.com/97/280761953_fb3a5e576b_o.jpg The bright and close AB pair is in the middle, B sits immediately above (north) of A. C is the fainter star towards upper left of the two. I did astrometry on my images with Astrometrica (see http://www.astrometrica.at) and determined separation and PA of A-C on these images. In addition I took 1 and 3 second exposures and measured the AB pair on them (C is also visible towards upper left): http://static.flickr.com/120/280761955_a3a94956ed_o.jpg Measures: year 2006.81 STF3055 AB: distance 5.5 +- 0.2 arcsec / PA 359.1 +- 0.9 deg / 24 images STF3055 AC: distance 122.7 arcsec / PA 31.5 deg / 8 images All 3 stars appear relatively unchanged since the first measures in the WDS and seem to share common proper motion.