Astronomy:HD 20468
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Short description: K-type bright giant star in the constellation Perseus
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| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Perseus |
| Right ascension | 03h 18m 43.82583s[1] |
| Declination | 34° 13′ 21.5473″[1] |
| Apparent magnitude (V) | 4.82[2] |
| Characteristics | |
| Spectral type | K2IICN1[3] |
| U−B color index | +1.55[2] |
| B−V color index | +1.49[2] |
| Astrometry | |
| Radial velocity (Rv) | +1.80[4] km/s |
| Proper motion (μ) | RA: +2.75[1] mas/yr Dec.: -8.87[1] mas/yr |
| Parallax (π) | 2.77 ± 0.23[1] mas |
| Distance | 1,180 ± 100 ly (360 ± 30 pc) |
| Absolute magnitude (MV) | -2.92[5] |
| Details | |
| Mass | 7.0[6] M☉ |
| Luminosity | 3512[7] L☉ |
| Surface gravity (log g) | 1.09[8] cgs |
| Temperature | 4,369[8] K |
| Metallicity [Fe/H] | +0.03[8] dex |
| Rotational velocity (v sin i) | 5.9[9] km/s |
| Other designations | |
BD+33°619, FK5 2232, GC 3948, HIP 15416, HR 991, HD 20468, SAO 56340 | |
| Database references | |
| SIMBAD | data |
HD 20468 is a class K2II[3] (orange bright giant) star in the constellation Perseus. Its apparent magnitude is 4.82[2] and it is approximately 1180 light years away based on parallax.[1]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics 474 (2): 653–664. doi:10.1051/0004-6361:20078357. Bibcode: 2007A&A...474..653V. Vizier catalog entry
- ↑ 2.0 2.1 2.2 2.3 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.
- ↑ 3.0 3.1 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.
- ↑ 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". Astronomy & Astrophysics 430: 165–186. doi:10.1051/0004-6361:20041272. Bibcode: 2005A&A...430..165F.
- ↑ Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A. Vizier catalog entry
- ↑ Tetzlaff, N.; Neuhäuser, R.; Hohle, M. M. (2011). "A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun". Monthly Notices of the Royal Astronomical Society 410: 190–200. doi:10.1111/j.1365-2966.2010.17434.x. Bibcode: 2011MNRAS.410..190T. Vizier catalog entry
- ↑ Hohle, M.M.; Neuhäuser, R.; Schutz, B.F. (2010). "Masses and luminosities of O- and B-type stars and red supergiants". Astronomische Nachrichten 331 (4): 349. doi:10.1002/asna.200911355. Bibcode: 2010AN....331..349H. Vizier catalog entry
- ↑ 8.0 8.1 8.2 Earle Luck, R. (2014). "Parameters and Abundances in Luminous Stars". The Astronomical Journal 147 (6): 137. doi:10.1088/0004-6256/147/6/137. Bibcode: 2014AJ....147..137L.
- ↑ 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. doi:10.1051/aas:1999401. Bibcode: 1999A&AS..139..433D. Vizier catalog entry
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