(IAAC) Obj: Sigma Orionis and Struve 761 - Inst: 8" F/6 Dobsonian

Observer: Michael Geldorp
Your skills: Beginner (< one year)
Date/time of observation: 1/9/1999  23.20 UT
Location of site: Alphen ad Rijn, Netherlands (Lat 52.09, Elev )
Site classification: Suburban
Sky darkness: 5.0 <Limiting magnitude>
Seeing: I-II <I-V Seeing Scale (I best)>
Moon presence: None - moon not in sky
Instrument: 8" F/6 Dobsonian
Magnification: 49X, 98X
Filter(s): none
Object(s): Sigma Orionis and Struve 761
Category: Multiple star.
Constellation: Ori
Data: mag 3.7  size 
Position: RA 05:39  DEC -02:36
Nice multiple star systems easily found near zeta Ori.
Both Sigma and Struve 761 are triple systems and all stars appeared white.
there is a sketch on this object on my homepage: URL mentioned below
Optional related URLs: http://home.wxs.nl/~geldo006/home.html
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