HD 18970

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]

HD 18970

Location of k Persei (circled)
Observation data Epoch J2000      Equinox J2000
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 mas[1]
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

References

1. Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. S2CID 18759600. Vizier catalog entry
2. 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
3. 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. 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
5. 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. arXiv:astro-ph/0409579. Bibcode:2005A&A...430..165F. doi:10.1051/0004-6361:20041272. S2CID 17804304.
6. 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
7. Gontcharov, G. A. (2009). "Red giant clump in the Tycho-2 catalogue". Astronomy Letters. 34 (11): 785–796. arXiv:1607.00619. Bibcode:2008AstL...34..785G. doi:10.1134/S1063773708110078. S2CID 73524157. Vizier catalog entry
8. 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. arXiv:1312.3474. Bibcode:2014A&A...561A.126D. doi:10.1051/0004-6361/201220762. S2CID 54046583. Vizier catalog entry