Struve 331

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:

The seeing was poor in this part of the sky and the color of the stars hard to determine. If anything, the primary was pale yellow, and the secondary blueish. I estimated PA at 70° and a separation of 18″. Listed values from the AL double star list are 85° and 12.1″. I didn’t do so hot on the PA there.

Subject Double/Multiple Star: Struve 331
Classification Double Star
Position Perseus [RA: 03:00:54 / Dec: +52:21]*
Separation* 12.1″
Magnitudes* 5.3, 6.7
Position Angle* 85°
Date/Time 08/14/05 – 12:00 AM
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 3/10
Transparency NELM Mag 5.8

*Based on published data.