October 18, 2006: To help provide a consistent style for my double star sketches, the above sketch is a digital update to the original sketch.
Observation Notes:
This is the closest AL Double I’ve observed so far. Both stars were white. The secondary appeared to sit at 330° PA, and a distance of about 2.5 diffraction rings from the primary…so maybe that’s about 2.5″? Listed values from the AL double star list are 326° and 3″.
| Subject | Sigma Cassiopeiae (Struve 3049) |
| Classification | Triple Star |
| Position | Cassiopeia [RA: 23:59:00 / Dec: +55:45]* |
| Separation* | 3″ |
| Magnitudes* | 5.0, 7.1 |
| Position Angle* | 326° |
| Date/Time | 08/13/05 – 11:45 PM |
| 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 | Partly cloudy, calm, 55°F |
| Seeing | 6/10 |
| Transparency | NELM Mag 5.8 |
*Based on published data.