Mu Crucis (DUN 126)

Observation Notes:

While enjoying the view from the summit of Haleakala on Maui, I was able to make a binocular observation of the wide double, Mu Crucis. This wide double was a nice binocular target and was only difficult to split when the wind was shaking my lightweight tripod. The primary was bright blue and the secondary appeared to be an elusive orange color. This must have been a contrast effect, since the secondary is a B5 star. This is as far south as I'll be getting on a double star for a good long while: -57° declination is 2 degrees below the horizon in Flagstaff, and about ten degrees below a useful altitude from here.

SubjectMu Crucis (DUN 126)
ClassificationDouble Star
Position (J2000)Crux [RA: 12:54:35.5 / Dec: -57:10:40]*
Position Angle*17° (1826)
Separation*34.9" (1826)
Magnitudes*A: 4.03 / B: 5.17
Spectral Types*B3 / B5
Date/TimeJUN 3, 2007 - 9:30 AM HADT (JUN 4, 2007 - 10:30 UT)
Observing Loc.Haleakala Summit, Maui, HI (10,000 ft.)
InstrumentOberwerk 15 x 70 Binoculars
ConditionsClear, cool, Breezy
TransparencyNELM Mag ~6.5
ReferencesThe Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996); Catalogue of Stellar Spectral Classifications (Skiff, 2005)
*Based on published data.

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This page contains a single entry by Jeremy Perez published on June 15, 2007 11:36 PM.

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