Chi¹ Orionis
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| 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 |
| 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 | |
| Temperature | 5,955 ± 6.1[2] K |
| Metallicity [Fe/H] | -0.01[3] dex |
| Rotation | 5.2 days[3] |
| Age | 300–400[4] Myr |
| Other designations | |
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 a candidate stream star member of the Ursa Major Moving Group, although there is some evidence to the contrary.[3]
[edit] References
- ^ 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
- ^ 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
- ^ a b c Maldonado, J. et al. (October 2010), "A spectroscopy study of nearby late-type stars, possible members of stellar kinematic groups", Astronomy and Astrophysics 521: A12, Bibcode 2010A&A...521A..12M, doi:10.1051/0004-6361/201014948
- ^ 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
[edit] External links
- Chi-1 Orionis by Professor Jim Kaler.
- Chi1 Orionis 2 at SolStation.
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