Re: (IAAC) Obj: sigma Ori - Inst: Orion 6" Dob
William L. Schart wrote:
> Observer: William L. Schart
> Your skills: Intermediate (some years)
> Date/time of observation: 11/26/98 10:25 pm CST
> Location of site: Killeen, TX (Lat 31 N, Elev 600 ft)
> Site classification: Suburban
> Sky darkness: 4 <Limiting magnitude>
> Seeing: 8 <1-10 Seeing Scale (10 best)>
> Moon presence: Minor - crescent or far from object
> Instrument: Orion 6" Dob
> Magnification: 32x, 48x, 120x
> Filter(s): none
> Object(s): sigma Ori
> Category: Multiple star.
> Constellation: Ori
> Data: mag size
> Position: RA : DEC :
> Located a short distance from zeta Ori. Not visible to me naked-eye, but clearly
> visible in the same finder field. A 4 star system, with a birght primary, somewhat
> fainter second member, and 2 very faint stars. A low power it is apparent that
> this is a multiple, and the 3 brightest are split at 48x. It took 120x to split
> the fourth member. No color, other than white, noticable for any of them.
> Optional related URLs: http://forums.delphi.com/m/main.asp?sigdir=33_doubles
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FYI, sigma Orionis is actually a 5 star system with one being a spectroscopic binary.
Did you notice the nearby triple star, Struve 761?
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