Alpha Leonis (Regulus / Struve 6)

Observation Notes:

Regulus makes for a wide double with a brilliant blue-white primary that gave a reddish purple appearance to its G-type secondary star. Separation appeared to be 1/3 of the field of view, or about 240 arc seconds. The actual value is 178 arc seconds (or about 1/4 of the field). So I managed to mess that estimate up a bit. My PA estimate of 315 degrees was in pretty good shape compared to the actual value of 307 degrees.

SubjectAlpha Leonis (Regulus / STF 6)
ClassificationDouble Star
Position (J2000)[RA: 10:08:22.1 / Dec: +11:58:01]*
Position Angle*307° (1836)
Separation*177.6" (1960)
Magnitudes*A = 1.35; B = 8.12
Spectral Types*A = B7V; B = G
Date/TimeOCT 22, 2006 - 04:10 AM MST (OCT 22, 2006 - 11:10 UT)
Observing Loc.Cinder Hills Overlook, Sunset Crater National Monument, AZ
InstrumentOrion SVP 6LT Reflector (150 mm dia./1200 mm F/L)
Eyepieces/Mag.10 mm + 2X Barlow (240X)
ConditionsClear, calm
TransparencyNELM Mag 6.8+
ReferencesThe Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996), Visual Double Stars in Hipparcos (Dommanget+, 2000) via VizieR

*Based on published data.

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This page contains a single entry by Jeremy Perez published on December 2, 2006 9:58 PM.

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Gamma Leonis (Algieba / Struve 1424) is the next entry in this blog.

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