Zeta Orionis (Struve 774)

October 12, 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:

My first impression was of a wide double with a blue southern component that was much brighter than its southern counterpart. I had to use averted vision to see the northern star--high clouds were getting very problematic. After further research later, it turns out I missed a third bright component that is separated by 2.4" from the brightest star. So I should really be seeing a triple star. I want to look at this again to see if I can pick out this closer star.

SubjectZeta Orionis (Alnitak / 50 ORI / STF 774)
ClassificationMultiple Star
PositionOrion [RA: 05:40:45.5 / Dec: -01:56:33]*
Separation*2.4", 58"
Magnitudes*1.9 / 4.0 / 9.9
Position Angle*162° / 10°
Date/Time01/16/05 - 10:05 PM
Observing Loc.Flagstaff, AZ - Home
InstrumentOrion SVP 6LT Reflector (150 mm dia./1200 mm F/L)
Eyepieces/Mag.10 mm + 2X Barlow (240X)
ConditionsPatchy high clouds, cool (34°F), 1st quarter Moon
TransparencyMag 4.0 NELM

*Based on published data.

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This page contains a single entry by Jeremy Perez published on January 16, 2005 10:05 PM.

Delta Orionis (Struve 14) was the previous entry in this blog.

Sigma Orionis (Struve 762) is the next entry in this blog.

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