About a degree and a half south of the Sombrero Galaxy, M104, you’ll find the multiple star, Struve 1669. The main attraction here is a pair of 6th magnitude F class stars. When observing them, don’t forget to take in a third, tenth-magnitude star 1 arc minute to the southwest. The two brighter stars appeared to be separated by about 4 arc seconds, and resting at a PA of 315 degrees. Values in the Washington Double Star Catalog list 5.4″ from 1828 and 312 degrees from 1991. Color was tough to nail down, and I eventually settled for pale yellow for the northwest star and white for the southeast companion. Give it a look the next time you’re dancing around that nearby galactic hat and see what colors you perceive.
|Position (J2000)||Corvus [RA: 12:41:15.8 / Dec: -13:00:49]*|
|Position Angle*||AB: 312Â° (1991); AC: 235Â° (1900)|
|Separation*||AB: 5.4″ (1828); AC: 59″ (1900)|
|Magnitudes*||A: 6.0; B: 6.1; C: 10.5|
|Spectral Types*||F5V; F5V; –|
|Date/Time||JAN 18, 2007 – 06:40 AM MST (JAN 18, 2007 – 13:40 UT)|
|Observing Loc.||Flagstaff, AZ – Home|
|Instrument||Orion SVP 6LT Reflector (150 mm dia./1200 mm F/L)|
|Eyepieces/Mag.||10 mm + 2X Barlow (240X)|
|Conditions||Clear, calm, 11Â° F|
|Transparency||NELM Mag ~5.0|
|References||The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)|
*Based on published data.