Back عاتق الثريا Arabic Atik AST Omikron Persei Czech Atik German Atik Spanish امیکرون برساووش Persian Omicron Persei French Omicron Persei ID Omicron Persei Italian ペルセウス座オミクロン星 Japanese
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| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Perseus |
| A | |
| Right ascension | 03h 44m 19.13377s[1] |
| Declination | 32° 17′ 17.6874″[1] |
| Apparent magnitude (V) | 3.83[2] |
| B | |
| Right ascension | 03h 44m 19.17122s[3] |
| Declination | 32° 17′ 18.5103″[3] |
| Apparent magnitude (V) | 6.68[4] |
| Characteristics | |
| A | |
| Spectral type | B1III / B2V[5] |
| U−B color index | -0.75[2] |
| B−V color index | +0.05[2] |
| Variable type | ellipsoidal[6] |
| Astrometry | |
| Radial velocity (Rv) | +12.20[7] km/s |
| Absolute magnitude (MV) | −4.4[5] |
| A | |
| Proper motion (μ) | RA: +6.091[1] mas/yr Dec.: −9.732[1] mas/yr |
| Parallax (π) | 3.0224 ± 0.3827 mas[1] |
| Distance | approx. 1,100 ly (approx. 330 pc) |
| Orbit[5] | |
| Primary | Aa |
| Companion | Ab |
| Period (P) | 4.4191447 days |
| Semi-major axis (a) | 33 R☉ |
| Eccentricity (e) | 0.0 |
| Inclination (i) | 39±15° |
| Semi-amplitude (K1) (primary) | 111.8 km/s |
| Semi-amplitude (K2) (secondary) | 155.0 km/s |
| Details | |
| Aa | |
| Mass | 14[8] M☉ |
| Radius | 9.6[5] R☉ |
| Surface gravity (log g) | 3.4[8] cgs |
| Temperature | 22,700[8] K |
| Rotational velocity (v sin i) | 70±5[5] km/s |
| Ab | |
| Mass | 10[8] M☉ |
| Radius | 8.9[5] R☉ |
| Surface gravity (log g) | 4.0[8] cgs |
| Temperature | 21,000[8] K |
| Rotational velocity (v sin i) | 65±15[5] km/s |
| Age | 15[5] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
Omicron Persei (ο Persei, abbreviated Omicron Per, ο Per) is a triple star system in the constellation of Perseus. From parallax measurements taken during the Hipparcos mission it is approximately 1,100 light-years (330 parsecs) from the Sun.
The system consists of a spectroscopic binary pair designated Omicron Persei A and a third companion Omicron Persei B.[9] A's two components are themselves designated Omicron Persei Aa (officially named Atik /ˈeɪtɪk/, the traditional name of the system)[10][11] and Ab.
- ^ a b c d e Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
- ^ 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.
- ^ a b Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
- ^ Fabricius, C.; Høg, E.; Makarov, V. V.; Mason, B. D.; Wycoff, G. L.; Urban, S. E. (2002). "The Tycho double star catalogue". Astronomy and Astrophysics. 384: 180–189. Bibcode:2002A&A...384..180F. doi:10.1051/0004-6361:20011822.
- ^ a b c d e f g h Stickland, D. J.; Lloyd, C. (1998). "Spectroscopic binary orbits from ultraviolet radial velocities. Paper 28: Omicron Persei". The Observatory. 118: 138. Bibcode:1998Obs...118..138S.
- ^ Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S. 1. Bibcode:2009yCat....102025S.
- ^ Pourbaix, D.; Tokovinin, A. A.; Batten, A. H.; Fekel, F. C.; Hartkopf, W. I.; Levato, H.; Morrell, N. I.; Torres, G.; Udry, S. (2004). "SB9: The ninth catalogue of spectroscopic binary orbits". Astronomy and Astrophysics. 424 (2): 727–732. arXiv:astro-ph/0406573. Bibcode:2004A&A...424..727P. doi:10.1051/0004-6361:20041213. S2CID 119387088.
- ^ a b c d e f Lyubimkov, L. S.; Rachkovskaya, T. M.; Rostopchin, S. I.; Tarasov, A. E. (1997). "The binary system o per: Orbital elements, component parameters, and helium abundance". Astronomy Reports. 41 (5): 630. Bibcode:1997ARep...41..630L.
- ^ "Displaying next number in catalog HIP => 17448". Multiple Star Catalog. Retrieved 2018-02-19.
- ^ Kunitzsch, Paul; Smart, Tim (2006). A Dictionary of Modern star Names: A Short Guide to 254 Star Names and Their Derivations (2nd rev. ed.). Cambridge, Massachusetts: Sky Pub. ISBN 978-1-931559-44-7.
- ^ "Naming Stars". IAU.org. Retrieved 16 December 2017.