Single star in the constellation Orion
This article is about k Orionis; it is not to be confused with
κ Orionis .
74 Orionis Location of 74 Orionis (circled in red)
Observation dataEpoch J2000 Equinox J2000 Constellation Orion Right ascension 06h 16m 26.61911s [ 1] Declination +12° 16′ 19.7876″[ 1] Apparent magnitude (V)5.04[ 2] Characteristics Evolutionary stage main sequence [ 1] Spectral type F5V[ 3] U−Bcolor index −0.02[ 4] B−Vcolor index +0.42[ 4] Astrometry Radial velocity (Rv )+9.17[ 5] km/s Proper motion (μ)RA: +82.775[ 1] mas /yr Dec.: +186.480[ 1] mas /yr Parallax (π)51.0518± 0.0969 mas [ 1] Distance 63.9 ± 0.1 ly pc ) Absolute magnitude (MV )3.62[ 2] Details Mass 1.39[ 6] M ☉ Radius 1.3[ 7] R ☉ Luminosity 3.02[ 2] L ☉ Surface gravity (log g )4.34[ 6] cgs Temperature 6,595[ 6] K Metallicity [Fe/H] −0.03[ 2] dex Rotational velocity (v sin i )18.8[ 8] Age 2.316[ 6] Gyr Other designations k Ori ,74 Ori ,BD +12°1084FK5 1169GC 8033GJ 9207HD 43386HIP 29800HR 2241SAO 95476CCDM J06165+1216AWDS J06164+1216ALTT 11823[ 9] Database references SIMBAD data
74 Orionis is a single[ 10] star in theequatorial constellation ofOrion . It has theBayer designation k Orionis , while74 Orionis is theFlamsteed designation . This object is visible to the naked eye as a faint, yellow-white hued point of light with anapparent visual magnitude of 5.04.[ 2] light years from the Sun based onparallax ,[ 1] radial velocity of +9 km/s.[ 5] proper motion , traversing thecelestial sphere at the rate of 0.204 arc seconds per annum.[ 11]
This object is an ordinaryF-type main-sequence star with astellar classification of F5V.[ 3] [ 6] projected rotational velocity of 18.8 km/s.[ 8] [ 6] mass of the Sun and 1.3[ 7] Sun's radius .Metallicity is near solar,[ 2] [ 2] luminosity of the Sun from itsphotosphere at aneffective temperature of 6,595 K.[ 6]
74 Orionis has twovisual companions : component B, with magnitude 12.5 and separation 32.1", and C, with magnitude 9.0 and separation 195.5".[ 12]
^a b c d e f g Vallenari, A.; et al. (Gaia collaboration) (2023)."Gaia Data Release 3. Summary of the content and survey properties" .Astronomy and Astrophysics .674 : A1.arXiv :2208.00211 Bibcode :2023A&A...674A...1G .doi :10.1051/0004-6361/202243940 S2CID 244398875 . Gaia DR3 record for this source atVizieR .^a b c d e f g Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation".Astronomy Letters .38 (5): 331.arXiv :1108.4971 Bibcode :2012AstL...38..331A .doi :10.1134/S1063773712050015 .S2CID 119257644 . Vizier catalog entry ^a b Gray, R. O.; Corbally, C. J.; Garrison, R. F.; McFadden, M. T.; Robinson, P. E. (2003). "Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 Parsecs: The Northern Sample. I".The Astronomical Journal .126 (4): 2048.arXiv :astro-ph/0308182 Bibcode :2003AJ....126.2048G .doi :10.1086/378365 .S2CID 119417105 . ^a b Mallama, A. (2014). "Sloan Magnitudes for the Brightest Stars".The Journal of the American Association of Variable Star Observers .42 (2): 443.Bibcode :2014JAVSO..42..443M . Vizier catalog entry ^a b Maldonado, J.; Martínez-Arnáiz, R. M.; Eiroa, C.; Montes, D.; Montesinos, B. (2010). "A spectroscopy study of nearby late-type stars, possible members of stellar kinematic groups".Astronomy and Astrophysics .521 : A12.arXiv :1007.1132 Bibcode :2010A&A...521A..12M .doi :10.1051/0004-6361/201014948 .S2CID 119209183 . ^a b c d e f g David, Trevor J.; Hillenbrand, Lynne A. (2015). "The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets".The Astrophysical Journal .804 (2): 146.arXiv :1501.03154 Bibcode :2015ApJ...804..146D .doi :10.1088/0004-637X/804/2/146 .S2CID 33401607 . Vizier catalog entry ^a b Allende Prieto, C.; Lambert, D. L. (1999). "Fundamental parameters of nearby stars from the comparison with evolutionary calculations: Masses, radii and effective temperatures".Astronomy and Astrophysics .352 :555– 562.arXiv :astro-ph/9911002 Bibcode :1999A&A...352..555A . Vizier catalog entry ^a b De Medeiros, J. R.; Mayor, M. (1999). "A catalog of rotational and radial velocities for evolved stars".Astronomy and Astrophysics Supplement Series .139 (3): 433.arXiv :astro-ph/0608248 Bibcode :1999A&AS..139..433D .doi :10.1051/aas:1999401 . Vizier catalog entry ^ "74 Ori" .SIMBAD Centre de données astronomiques de Strasbourg . Retrieved2019-08-08 .^ Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems",Monthly Notices of the Royal Astronomical Society 389 (2):869– 879,arXiv :0806.2878 Bibcode :2008MNRAS.389..869E ,doi :10.1111/j.1365-2966.2008.13596.x S2CID 14878976 . ^ Lépine, Sébastien; Shara, Michael M. (March 2005), "A Catalog of Northern Stars with Annual Proper Motions Larger than 0.15" (LSPM-NORTH Catalog)",The Astronomical Journal ,129 (3):1483– 1522,arXiv :astro-ph/0412070 Bibcode :2005AJ....129.1483L ,doi :10.1086/427854 ,S2CID 2603568 . ^ Mason, Brian D.; Wycoff, Gary L.; Hartkopf, William I.; Douglass, Geoffrey G.; Worley, Charles E. (2001)."The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog" .The Astronomical Journal .122 (6): 3466.Bibcode :2001AJ....122.3466M .doi :10.1086/323920 Vizier catalog entry
