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Rho Orionis

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ρ Orionis
Location of ρ Orionis (circled)
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Orion
Right ascension 05h 13m 17.48015s[1]
Declination +02° 51′ 40.5479″[1]
Apparent magnitude (V) +4.44[2]
Characteristics
Spectral type K0 III[3]
U−B color index +1.13[2]
B−V color index +1.19[2]
Astrometry
Radial velocity (Rv)40.5[4] km/s
Proper motion (μ) RA: +0.83[1] mas/yr
Dec.: +3.91[1] mas/yr
Parallax (π)9.32 ± 0.94 mas[1]
Distanceapprox. 350 ly
(approx. 110 pc)
Absolute magnitude (MV)−0.65[5]
Details[6]
Mass2.67 M☉
Luminosity251 L☉
Temperature4,533 K
Age650 Myr
Orbit[7]
Period (P)1031.4 days
Semi-major axis (a)6.9 mas
Eccentricity (e)0.1
Inclination (i)122.8°
Longitude of the node (Ω)242.6°
Periastron epoch (T)2426182.46
Argument of periastron (ω)
(secondary)		17.9°
Semi-amplitude (K1)
(primary)		8.70 km/s
Other designations
17 Ori, HD 33856, HIP 24331, SAO 112528, HR 1698, BD+02°888
Database references
SIMBADdata

Rho Orionis (ρ Ori) is a star in the constellation Orion. Its apparent magnitude is 4.48. Rho Orionis is a single-lined spectroscopic binary with a period of 1031.4 days.[7]

References

  1. ^ a b c d e van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357.
  2. ^ a b c Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues. 2237. Bibcode:2002yCat.2237....0D.
  3. ^ Houk, N.; Swift, C. (1999). "Michigan catalogue of two-dimensional spectral types for the HD Stars, Vol. 5". Michigan Spectral Survey. 05: 0. Bibcode:1999MSS...C05....0H.
  4. ^ Famaey, B.; Jorissen, A.; Luri, X.; Mayor, M.; Udry, S.; Dejonghe, H.; Turon, C. (2005). "Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data. Revisiting the concept of superclusters". Astronomy and Astrophysics. 430: 165. Bibcode:2005A&A...430..165F. doi:10.1051/0004-6361:20041272.
  5. ^ Smith, Graeme H.; Shetrone, Matthew D. (2000). "CaII K Emission-Line Asymmetry among Red Giants Detected by the ROSAT Satellite". The Publications of the Astronomical Society of the Pacific. 112 (776): 1320. Bibcode:2000PASP..112.1320S. doi:10.1086/316634.
  6. ^ Luck, R. Earle (2015). "Abundances in the Local Region. I. G and K Giants". The Astronomical Journal. 150 (3): 88. Bibcode:2015AJ....150...88L. doi:10.1088/0004-6256/150/3/88.
  7. ^ a b Ren, S. (2013), "Hipparcos Photocentric Orbits of 72 Single-lined Spectroscopic Binaries", The Astronomical Journal, 145 (3): 81, Bibcode:2013AJ....145...81R, doi:10.1088/0004-6256/145/3/81
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