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(IAAC) Obj: 16 Dra + 17 Dra - Inst: Vixen 9x63 binoculars



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Observation Poster: Stéphane Meloche <stephanemeloche@videotron.ca>

Observer: Stéphane Meloche
Your skills: Intermediate (some years)
Date/time of observation: 2007/04/21 6h UT 
Location of site: Ste-Catherine-de-Hatley, Québec, Canada (Lat 45.4542°, Elev 316 m)
Site classification: Suburban
Sky darkness: 5.2 <Limiting magnitude>
Seeing:  <1-10 Seeing Scale (10 best)>
Moon presence: None - moon not in sky
Instrument: Vixen 9x63 binoculars
Magnification: 
Filter(s): 
Object(s): 16 Dra + 17 Dra
Category: Multiple star.
Class: 
Constellation: Dra
Data: mag 5.4 + 5.5  size 
Position: RA 16:36.2  DEC 52:55
Description:
In Draco, at ~ 8¾° S of Eta Dra. Very beautiful double star, easy to split with
my binoculars. At first glance, the components seem of the same brightness but
careful observations show that 17 Dra is slightly brighter (in fact, the
difference of brightness between the primary and secondary star is only 0,128
magv). The difference in colors is noticeable: 17 Dra is green and 16 Dra is
blue. A double star to discover!
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