40, 41 Draconis (Struve 2308)

Observation Notes:

During a trip to Oklahoma, I brought the telescope along in hopes of doing some observing. But with clouds and constant wind, I got very little done. This was the one observation I was able to sketch and present. The A and B stars of this multiple were golden yellow in color and similar in brightness. I estimated PA at 228° with a 30 arcsecond separation. The actual AB values are 236° and 20.6 arcseconds. The C component didn’t display any obvious color and appeared to rest at 140° with a separation of about 200 arcseconds. The actual AC value is 128° and 221.6 arcseconds.

Subject 40, 41 Draconis (STF 2308)
Classification Multiple Star
Position (J2000) Draco[RA: 18:00:09.3 / Dec: +80:00:15]*
Position Angle* AB: 236° (1832) / AC 128° (1932)
Separation* AB: 20.6″ (1832) / AC 221.6″ (1932)
Magnitudes* A: 5.68 / B: 6.04
Spectral Types* K2V / K2V / G5
Date/Time MAR 19, 2007 – 12:05 AM MST (MAR 19, 2007 – 07:05 UT)
Observing Loc. Elk City, OK (Flying W Guest Ranch)
Instrument Orion SVP 6LT Reflector (150 mm dia./1200 mm F/L)
Eyepieces/Mag. 10 mm + 2X Barlow (240X)
Conditions Partly Cloudy, Breezy
Seeing 3/10 Pickering
Transparency NELM Mag ~5.0
References The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996); The Tycho-2 Spectral Type Catalog (Wright+, 2003)

*Based on published data.

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