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(IAAC) Obj: 78 UMa (binary star system) - Inst: 444.5 mm F/5 Newtonian



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Observation Poster: Charles Rose <crose@midsouth.rr.com>
Observer: Charles Rose
Your skills: Intermediate (some years)
Date/time of observation: 5/5/2002  8:45 pm CST
Location of site: Southaven, MS (Lat 34.97, Elev )
Site classification: Suburban
Sky darkness: 14.4 <Telescopic LM>
Seeing: 7 <1-10 Seeing Scale (10 best)>
Moon presence: None - moon not in sky
Instrument: 444.5 mm F/5 Newtonian
Magnification: 64x, 118x,229x, 300x, 370x, 444x
Filter(s): none
Object(s): 78 UMa (binary star system)
Category: Multiple star.
Class: 
Constellation: UMa
Data: mag 4.9, 8.2  size sep (1.46")
Position: RA 13:00  DEC 56:21
Description:
An interesting binary with a period of 110 years. PA=79 deg. The primary is class F4, and it had a yellowish hue as seen through the eyepeiece. The comes
was just detectable at 229x and widely separated from the primary at 444x. The 
secondary appeared blueish white. The components could not be separated with my 
10" newtonian at any magnification used. A very pleasing sight indeed proving 
again that bigger is better when it comes to aperture!
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