Regulus makes for a wide double with a brilliant blue-white primary that gave a reddish purple appearance to its G-type secondary star. Separation appeared to be 1/3 of the field of view, or about 240 arc seconds. The actual value is 178 arc seconds (or about 1/4 of the field). So I managed to mess that estimate up a bit. My PA estimate of 315 degrees was in pretty good shape compared to the actual value of 307 degrees.
|Subject||Alpha Leonis (Regulus / STF 6)|
|Position (J2000)||[RA: 10:08:22.1 / Dec: +11:58:01]*|
|Position Angle*||307Â° (1836)|
|Magnitudes*||A = 1.35; B = 8.12|
|Spectral Types*||A = B7V; B = G|
|Date/Time||OCT 22, 2006 – 04:10 AM MST (OCT 22, 2006 – 11:10 UT)|
|Observing Loc.||Cinder Hills Overlook, Sunset Crater National Monument, AZ|
|Instrument||Orion SVP 6LT Reflector (150 mm dia./1200 mm F/L)|
|Eyepieces/Mag.||10 mm + 2X Barlow (240X)|
|Transparency||NELM Mag 6.8+|
|References||The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996), Visual Double Stars in Hipparcos (Dommanget+, 2000) via VizieR|
*Based on published data.