Albireo (Beta Cygni / Struve-A 43)

Digital Illustration of Albireo (Beta Cygni / STFA 43)

Digital Illustration of Albireo (Beta Cygni / Struve-A 43)

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Observation Notes – October 15/16, 2011:

Albireo gets its startling beauty not only from its striking color contrast, but also from the rich star field that surrounds it. I wanted to make an updated sketch that shows that field at lower power. This shows the double in a 35 arc minute wide 120X field. I also took a few minutes to measure separation and PA, recorded below.

Subject Albireo / Beta Cygni (STF-A 43)
Classification Double Star
Position (J2000) Cygnus [RA: 19:30:43.281 / Dec: +27:57:34.85]*
Position Angle* AB: 54° [My Measurement 2011.9]
AB: 54° [WDS 2010]*
Separation* AB: 36″ [My Measurement 2011.9]
AB: 34.8 [WDS 2010]*
Magnitudes* 3.2/4.7
Spectral Types* K3II/B8V
Date/Time OCT 15, 2011 – 10:00 MST (OCT 16, 2011 – 05:00 UT)
Observing Loc. Flagstaff, AZ – Home
Instrument Orion SkyQuest XT8 Dobsonian (203 mm dia./1200 mm F/L)
Eyepieces/Mag. Pentax XW10 (120X)
Meade Astrometric EP + 2X Barlow (200X)
Conditions Clear, cool, rising gibbous moon
Seeing 5/10 Pickering
Transparency Mag. ~5.2 NELM
*References The Washington Visual Double Star Catalog (Mason+, 2001-2012)

Observation Notes and Sketch – September 4, 2006:

After viewing several subtly or elusively colored doubles, this pair was like dynamite! The purest yellow primary with a deep blue secondary snuggled amid a number of fainter stars that sprinkled the high power view. It looks even better at low power with a greater number of field stars and those saturated colors nestled even closer to each other.

Date/Time SEP 04, 2006 – 1:10 AM MST (SEP 04, 2006 – 08:25 UT)
Observing Loc. Flagstaff, AZ – Home
Instrument Orion SVP 6LT Reflector (150 mm dia./1200 mm F/L)
Eyepieces/Mag. 10 mm Sirius Plossl + 2X Barlow (240X)
Conditions Clear, calm
Seeing 5/10 Pickering
Transparency NELM Mag ~4.0

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