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.