Astronomy:HD 18970
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Short description: Star in the constellation Perseus
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| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Perseus |
| Right ascension | 03h 05m 32.41223s[1] |
| Declination | 56° 42′ 20.5858″[1] |
| Apparent magnitude (V) | 4.77[2] |
| Characteristics | |
| Spectral type | G9.5III[3] |
| U−B color index | +0.85[4] |
| B−V color index | +1.02[4] |
| Astrometry | |
| Radial velocity (Rv) | -46.37[5] km/s |
| Proper motion (μ) | RA: -12.72[1] mas/yr Dec.: +70.04[1] mas/yr |
| Parallax (π) | 15.45 ± 0.27[1] mas |
| Distance | 211 ± 4 ly (65 ± 1 pc) |
| Absolute magnitude (MV) | 0.72[2] |
| Details | |
| Mass | 1.53[6] M☉ |
| Radius | 11[6] R☉ |
| Luminosity | 63.48[2] L☉ |
| Surface gravity (log g) | 2.54[6] cgs |
| Temperature | 4,900[7] K |
| Metallicity [Fe/H] | -0.08[2] dex |
| Rotational velocity (v sin i) | < 1.0[8] km/s |
| Other designations | |
k Persei, BD+56°767, FK5 2217, GC 3674, HIP 14382, HR 918, HD 18970, SAO 23791 | |
| Database references | |
| SIMBAD | data |
HD 18970 is a class G9.5III[3] (yellow giant) star in the constellation Perseus. Its apparent magnitude is 4.77[2] and it is approximately 211 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 2.4 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
- ↑ 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.
- ↑ 4.0 4.1 Mermilliod, J. C. (2006). "VizieR Online Data Catalog: Homogeneous Means in the UBV System (Mermilliod 1991)". VizieR On-line Data Catalog: II/168. Originally Published in: Institut d'Astronomie 2168. Bibcode: 2006yCat.2168....0M.Vizier catalog entry
- ↑ 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.
- ↑ 6.0 6.1 6.2 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. Bibcode: 1999A&A...352..555A. Vizier catalog entry
- ↑ Gontcharov, G. A. (2009). "Red giant clump in the Tycho-2 catalogue". Astronomy Letters 34 (11): 785–796. doi:10.1134/S1063773708110078. Bibcode: 2008AstL...34..785G. Vizier catalog entry
- ↑ De Medeiros, J. R.; Alves, S.; Udry, S.; Andersen, J.; Nordström, B.; Mayor, M. (2014). "A catalog of rotational and radial velocities for evolved stars". Astronomy & Astrophysics 561: A126. doi:10.1051/0004-6361/201220762. Bibcode: 2014A&A...561A.126D. Vizier catalog entry
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