astro.wikisort.org - Star15 Orionis is a suspected astrometric binary[9] star system in the equatorial constellation of Orion, near the border with Taurus. It is visible to the naked eye as a faint, yellow-white hued star with an apparent visual magnitude of 4.82.[2] The system is approximately 340 light years away from the Sun based on parallax. It is moving further from the Earth with a heliocentric radial velocity of +29 km/s,[4] having come to within 69 light-years some three million years ago.[5]
Star system in the constellation Orion
15 Orionis
Location of 15 Orionis (circled) |
Observation data Epoch J2000 Equinox J2000 |
Constellation |
Orion |
Right ascension |
05h 09m 41.96481s[1] |
Declination |
15° 35′ 49.9051″[1] |
Apparent magnitude (V) |
4.82[2] |
Characteristics |
Spectral type |
F2IV[3] |
U−B color index |
+0.19[2] |
B−V color index |
+0.32[2] |
Astrometry |
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|
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Radial velocity (Rv) | +28.79[4] km/s |
Proper motion (μ) | RA: −3.105[1] mas/yr Dec.: –3.444[1] mas/yr |
Parallax (π) | 9.5097 ± 0.2951 mas[1] |
Distance | 340 ± 10 ly (105 ± 3 pc) |
Absolute magnitude (MV) | −0.04[5] |
|
Details |
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15 Ori A |
---|
Mass | 3.42±0.67[6] M☉ |
Radius | 5.9[7] R☉ |
Luminosity | 300[6] L☉ |
Surface gravity (log g) | 3.75[8] cgs |
Temperature | 7,161+50 −49[6] K |
Metallicity [Fe/H] | +0.21[8] dex |
Rotational velocity (v sin i) | 60[6] km/s |
|
Other designations |
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15 Ori, BD+15°752, GC 6306, HD 33276, HIP 24010, HR 1676, SAO 94359, CCDM J05097+1536AB, WDS J05097+1536AB |
Database references |
---|
SIMBAD | data |
The primary component is an early F-type subgiant star with a stellar classification of F2 IV,[3] a star that has exhausted the hydrogen at its core and has begun to evolve into a giant. It has 3.42[6] times the mass of the Sun and 5.9[7] times the Sun's radius. The star still has a relatively high rotation rate, showing a projected rotational velocity of 60 km/s.[6] It is radiating 300 times the luminosity of the Sun from its expanding photosphere at an effective temperature of 7,161 K.[6]
It has one suspected companion, component B, at a separation of 0.3".[10]
References
- 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.
- 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.
- Hoffleit, D.; Warren, W. H. (1995). "VizieR Online Data Catalog: Bright Star Catalogue, 5th Revised Ed. (Hoffleit+, 1991)". VizieR On-line Data Catalog: V/50. Originally Published in: 1964BS....C......0H. 5050. Bibcode:1995yCat.5050....0H.
- Massarotti, Alessandro; Latham, David W.; Stefanik, Robert P.; Fogel, Jeffrey (2008). "Rotational and Radial Velocities for a Sample of 761 Hipparcos Giants and the Role of Binarity". The Astronomical Journal. 135 (1): 209–231. Bibcode:2008AJ....135..209M. doi:10.1088/0004-6256/135/1/209. S2CID 121883397.
- 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
- Zorec, J.; Royer, F.; Asplund, Martin; Cassisi, Santi; Ramirez, Ivan; Melendez, Jorge; Bensby, Thomas; Feltzing, Sofia (2012). "Rotational velocities of A-type stars. IV. Evolution of rotational velocities". Astronomy and Astrophysics. 537: A120. arXiv:1201.2052. Bibcode:2012A&A...537A.120Z. doi:10.1051/0004-6361/201117691. S2CID 55586789.
- 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
- Wu, Yue; Singh, H. P.; Prugniel, P.; Gupta, R.; Koleva, M. (2010). "Coudé-feed stellar spectral library – atmospheric parameters". Astronomy & Astrophysics. 525: A71. arXiv:1009.1491. Bibcode:2011A&A...525A..71W. doi:10.1051/0004-6361/201015014. S2CID 53480665.
- 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.
- 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
Stars of Orion |
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Bayer | |
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Flamsteed | |
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Variable |
- S
- T
- U
- W
- Z
- RS
- UX
- VV
- VY
- YY
- AN
- BF
- BL
- BM
- BN
- BQ
- CK
- CN
- CO
- CZ
- DN
- DY
- ER
- EW
- EY
- FH
- FT
- FU
- FZ
- GG
- GP
- GU
- GW
- HK
- KX
- V346
- V351
- V359
- V371
- V372
- V380
- V586
- V883
- V901
- V1005
- V1031
- V1046
- V1051
- V1107
- V1118
- V1149
- V1155
- V1156
- V1159
- V1162
- V1179
- V1192
- V1197
- V1261
- V1307
- V1309
- V1355
- V1357
- V1366
- V1369
- V1377
- V1389
- V1647
- V1649
- V1788
|
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HR | |
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HD | |
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Gliese | |
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Other | |
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На других языках
[de] 15 Orionis
15 Orionis ist ein früher Unterriese der Klasse F im Sternbild Orion.
- [en] 15 Orionis
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