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Chi¹ Orionis: Wikis


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Chi1 Orionis A
Observation data
Epoch J2000      Equinox J2000
Constellation Orion
Right ascension 05h 54m 22.98s [1]
Declination +20° 16′ 34.2″ [1]
Apparent magnitude (V) 4.39
Spectral type G0 V
U-B color index 0.07
B-V color index 0.59
Variable type None
Radial velocity (Rv) -13.4 km/s
Proper motion (μ) RA: -162.54 ± 0.28 [1] mas/yr
Dec.: -99.51 ± 0.16 [1] mas/yr
Parallax (π) 115.43 ± 0.27[1] mas
Distance 28.26 ± 0.07 ly
(8.66 ± 0.02 pc)
Absolute magnitude (MV) 4.67
Mass 1 M
Radius 1.45 R
Luminosity 1.08 L
Temperature 5,955 ± 6.1 [2] K
Metallicity 89-178%
Rotation 24.5 days (6 km/s.)
Age 108 years
Other designations
54 Ori, Gl 222 A, HR 2047, BD +20°1162, HD 39587, LTT 11743, GCTP 1354.00, SAO 77705, HIP 27913.
Star map of the Bayers Stars in Orion. Chi1 Orionis is indicated.

Chi1 Orionis1 Ori / χ1 Orionis) is a star about 28 light years away.[1] It is in the constellation Orion.

χ1 Ori is a main sequence dwarf star of spectral type G0V. It has a faint companion with a mass estimated at about 15% of the mass of the Sun, an orbital period of 14.1 years, and an estimated stellar class of M6. The companion orbits an average distance of 6.1 AU from the primary, but has a fairly high orbital eccentricity, ranging from 3.3 AU out to 8.9 AU from the primary. Because of this red dwarf companion, there cannot be any habitable planets in this system.

χ1 Ori is believed to be a stream star member of the Ursa Major Moving Group.


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