August 13, 2005

Sigma Cassiopeiae

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	Double/Multiple Star: Sigma Cassiopeiae [ALDS 100]
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.

Posted by Jeremy at August 13, 2005 11:45 PM .

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