Observation Notes:
This bluish pair gave the appearance of sky blue for the primary and blue-gray for the secondary. My estimate for PA was 115°. Seeing was very poor in the area, and made the diffraction rings impossible to see clearly. My best guess was 5-10 arc seconds. Actual values are 106° and 7.9 arc seconds from a 1986 WDS measurement.
| Subject | 3 Centauri (H 101) |
| Classification | Double Star |
| Position (J2000) | [RA: 13:51:49.5 / Dec: -32:59:38]* |
| Position Angle* | 106° (1986) |
| Separation* | 7.9″ (1986) |
| Magnitudes* | 4.56; 6.06 |
| Spectral Types* | B5III; B8V |
| Date/Time | JAN 18, 2007 – 06:05 AM MST (JAN 18, 2007 – 13:05 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, 7° F |
| Seeing | 3/10 |
| Transparency | NELM Mag ~5.8 |
| References | The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996) |
*Based on published data.