Chi¹ Orionis

Chi¹ Orionis
Chi1 Orionis A
Chi 1 orionis diagram vectorized.svg
Star map of the Bayers Stars in Orion. Chi1 Orionis is indicated.
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
Characteristics
Spectral type G0 V
U−B color index 0.07
B−V color index 0.59
Variable type None
Astrometry
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
Details
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
Rotational velocity (v sin i) 6 km/s km/s
Age 3–4 × 108[3] years
Other designations
54 Ori, Gl 222 A, HR 2047, BD +20°1162, HD 39587, LTT 11743, GCTP 1354.00, SAO 77705, HIP 27913.

Chi1 Orionis (χ1 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, the likelihood of habitable planets in this system is low.

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

References

  1. ^ a b c d e f van Leeuwen, F. (2007). "HIP 27913". Hipparcos, the New Reduction. http://webviz.u-strasbg.fr/viz-bin/VizieR-5?-out.add=.&-source=I/311/hip2&recno=27842. Retrieved 2009-12-16. 
  2. ^ Kovtyukh et al. (2003). "High precision effective temperatures for 181 F-K dwarfs from line-depth ratios". Astronomy and Astrophysics 411 (3): 559–564. arXiv:astro-ph/0308429. Bibcode 2003A&A...411..559K. doi:10.1051/0004-6361:20031378. http://www.aanda.org/articles/aa/full/2003/46/aa3944/aa3944.html. 
  3. ^ Mamajek, Eric E.; Hillenbrand, Lynne A. (November 2008). "Improved Age Estimation for Solar-Type Dwarfs Using Activity-Rotation Diagnostics". The Astrophysical Journal 687 (2): 1264–1293. Bibcode 2008ApJ...687.1264M. doi:10.1086/591785. 

External links

v · d · eStars of Orion
Bayer
α (Betelgeuse) • β (Rigel) • γ (Bellatrix) • δ (Mintaka) • ε (Alnilam) • ζ (Alnitak) • η (Algjebba) • θ¹ (Trapezium Cluster: θ¹ A • θ¹ B • θ¹ C • θ¹ D) • θ² • ι (Hatsya) • κ (Saiph) • λ (Meissa) • μ • ν • ξ • ο¹ • ο² • π¹ • π² • π³ (Tabit) • π4 • ρ • σ • τ • υ (Thabit) • φ¹ • φ² • χ¹ • χ² • ψ • ω • b • c • d • e • f¹ • f² • g • h • i • k • l • m • n¹ • n² • o • p • A
Flamsteed
1 (π³, Tabit) • 2 (π²) • 3 (π4) • 4 (ο¹) • 5 • 6 (g) • 7 (π¹) • 9 (ο²) • 11 • 12 • 13 • 14 (i) • 15 • 16 (h) • 17 (ρ) • 18 • 19 (β, Rigel) • 20 (τ) • 21 • 22 (o) • 23 (m) • γ (Bellatrix) • 25 • 26 • 27 (p) • 28 (η, Algjebba) • 29 (e) • 30 (ψ) • 31 • 32 (A) • 33 (n¹) • 34 (δ, Mintaka) • 35 • 36 (υ, Thabit) • 37 (φ¹) • 38 (n²) • 39 (λ, Meissa) • 40 (φ²) • 41 (θ¹, Trapezium Cluster: θ¹ A • θ¹ B • θ¹ C • θ¹ D) • 42 (c) • 43 (θ²) • 44 (ι, Hatsya) • 45 • 46 (ε, Alnilam) • 47 (ω) • 48 (σ) • 49 (d) • 50 (ζ, Alnitak) • 51 (b) • 52 • 53 (κ, Saiph) • 54 (χ¹) • 55 • 56 • 57 • 58 (α, Betelgeuse) • 59 • 60 • 61 (μ) • 62 (χ²) • 63 • 64 • 65 • 66 • 67 (ν) • 68 • 69 (f¹) • 70 (ξ) • 71 • 72 (f²) • 73 • 74 (k) • 75 (l)
Nearby
GJ 3379 • Gliese 205 • Ross 47 • Gliese 223.2 • GJ 1087 • π³ (Tabit) • χ¹
Other
S • HD 36960



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