(IAAC) Obj: Omicron Dra (STF 2420) - Inst: Discovery DHQ 8" dobsonian
IAAC Deep-Sky Observing Log Entry
Name of observer: Tom Campbell
Your observing skills then: Advanced (many years)
Date/time of observation: June 6, 2003 11:30pm CDT
Site type: Exurban
Location: Iola, Kansas (Long: 95o24'W Lat: 37o55'N)
Transparency: Clear (8/10)
Seeing: Mostly Stable (7/10)
Moon presence: Major - Gibbous or near object
Instrument: Discovery DHQ 8" dobsonian
Powers: 49x, 81x, 125x, 203x, 305x
Deep Sky Object: Omicron Draconis (Struve 2420)
Object category: Multiple Star.
Position: RA: 18h 51m 12s | Dec: +59o23'
Object data: Mag: 4.7, 7.9
With the nearly first quarter Moon high overhead as twilight neared an
end, I knew that my Herschel galaxies were out of the question from my
back yard. So instead, I gathered up the last couple of issues of
Sky&Telescope to see what objects were featured. As it turned out,
most of the observing articles were about double stars. In the
moonlight, doubles seemed the best course to take, so I thought it was
fitting. I hand-picked several of those listed that I either hadn't
seen yet, or else I hadn't visited in quite a while. I began in Corona
Borealis, but the glare of the Moon in that region of sky made me
retreat into Draco, the land of the Dragon.
This double was wide and easily separated at 49x. In order to see the
colors better, however, I needed to boost the magnification to
88x. The primary was a searing yellow and the fainter companion
appeared blue. This was a pretty double, even though the blue star's
color wasn't as intense as in some other blue/yellow pairs.
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