(IAAC) Obj: Cr 140 - Inst: Vixen 9x63 binoculars

Observation Poster: Stéphane Meloche <stephanemeloche@videotron.ca>
Observer: Stéphane Meloche
Your skills: Intermediate (some years)
Date/time of observation: 2005/02/06 02h37 UT
Location of site: St-Joseph-de-Coleraine (Qc) Canada (Lat , Elev )
Site classification: Exurban
Sky darkness: 5,6 <Limiting magnitude>
Seeing:  <1-10 Seeing Scale (10 best)>
Moon presence: None - moon not in sky
Instrument: Vixen 9x63 binoculars
Object(s): Cr 140
Category: Open cluster.
Constellation: CMa
Data: mag 3.5  size 42'
Position: RA 07:24  DEC -32:12
At ~2½° S of Aludra (Eta CMa). Just like Cr 121, Cr 140 is an unspecified star grouping. Inside this one, I distinguish 12 stars individually: 3 brilliant, 4 of average brightness and 5 of low brightness. In the 3 more brilliant, there is one of them which is a double star, a companion points towards N, with an angular separation estimated at ~ 100". After checks, this double star is, in fact, Struve 47. Cr 140 offers an interesting view but I find that Cr 121 is more attractive. It makes me think of Small Ursa Major, with a deformed pan.
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