Theta Ori
HIP 26221; Theta1 Ori; 41 Ori
Physical Properties
Magnitude
5.13
Spectral Type
O6p
Star Color
White
(B-V 0.02)
Distance
3,262 ly
Position & Identifiers
RA
05h 35m 16.5s
Dec
-05° 23' 23.0"
Constellation
Orion
(Ori)
HR
1895
HIP
26221
Bayer
Theta1
Flamsteed
41 Ori
Double Cat
4186
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Spectral Classification
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Stellar Absorption Spectrum
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Stellar Notes
5.10 - 5.16V. He II 4686 suggests var. density of infalling material on time scale of days.
See HR 1893. Fixed with HR 1896 at 13".
Inverse P Cyg profile suggests infalling material rather than SB.
Abnormal reddening at 1500A. Color excess E(B-V) = +0.32. Morel and Magenat indicate R-I from -0.13 to 0.00 in | disagreement with other Johnson sources.
Ori OB1d; sword of Orion; a trapezium star. Orion Neb, NGC 1976, HII reg.
Interstellar Lyman alpha absorption observed by AEROBEE rocket. Also classified O6ep, O7Vp, O6.5III.
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