Summary
74 Orionis is a single[10] star in the equatorial constellation of Orion. It has the Bayer designation k Orionis, while 74 Orionis is the Flamsteed designation. This object is visible to the naked eye as a faint, yellow-white hued point of light with an apparent visual magnitude of 5.04.[2] It is located at a distance of 64 light years from the Sun based on parallax,[1] and is drifting further away with a radial velocity of +9 km/s.[5] The star has a relatively high proper motion, traversing the celestial sphere at the rate of 0.204 arc seconds per annum.[11]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Orion |
| Right ascension | 06h 16m 26.61878s[1] |
| Declination | 12° 16′ 19.7909″[1] |
| Apparent magnitude (V) | 5.04[2] |
| Characteristics | |
| Evolutionary stage | main sequence |
| Spectral type | F5V[3] |
| U−B color index | -0.02[4] |
| B−V color index | +0.42[4] |
| Astrometry | |
| Radial velocity (Rv) | +9.17[5] km/s |
| Proper motion (μ) | RA: +83.102[1] mas/yr Dec.: +186.263[1] mas/yr |
| Parallax (π) | 51.1930 ± 0.1907 mas[1] |
| Distance | 63.7 ± 0.2 ly (19.53 ± 0.07 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] km/s |
| Age | 2.316[6] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
This object is an ordinary F-type main-sequence star with a stellar classification of F5V.[3] It is an estimated 2.3[6] billion years old and is spinning with a projected rotational velocity of 18.8 km/s.[8] The star has 1.4[6] times the mass of the Sun and 1.3[7] times the Sun's radius. Metallicity is near solar,[2] which indicates it has a Sun-like abundances of elements. The star is radiating three[2] times the luminosity of the Sun from its photosphere at an effective temperature of 6,595 K.[6]
74 Orionis has two visual companions: component B, with magnitude 12.5 and separation 32.1", and C, with magnitude 9.0 and separation 195.5".[12]
References edit
- ^ a b c d e f Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- ^ 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. Retrieved 2019-08-08.
- ^ 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