HD 210434

HD 210434 is a subgiant star[3] in the equatorial constellation of Aquarius. According to the Bortle scale, an apparent magnitude of six means this star is faintly visible to the naked eye from dark rural skies. It is an estimated 630 million years old with 2.4 times the mass of the Sun.[3]

HD 210434

Observation data Epoch J2000      Equinox J2000
Constellation	Aquarius
Right ascension	22^h 10^m 33.74601^s[1]
Declination	−04° 16′ 00.6776″[1]
Apparent magnitude (V)	5.979[2]
Characteristics
Spectral type	KG8/0III[3]
U−B color index	0.84[4]
B−V color index	0.981[3]
Astrometry
Radial velocity (Rv)	−18.1[5] km/s
Proper motion (μ)	RA: +71.82[1] mas/yr Dec.: +3.74[1] mas/yr
Parallax (π)	9.81 ± 0.44[1] mas
Distance	330 ± 10 ly (102 ± 5 pc)
Absolute magnitude (MV)	1.30[3]
Details
Mass	2.4[3] M☉
Surface gravity (log g)	3.0[3][2] cgs
Temperature	4,928[3][2] K
Metallicity [Fe/H]	0.090±0.090[3][2] dex
Rotational velocity (v sin i)	3.3[3] km/s
Age	630[3] Myr
Other designations
BD-04° 5625, HD 210434, HIP 109466, HR 8453, SAO 145916.
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
2. Soubiran, C.; et al. (June 2010), "The PASTEL catalogue of stellar parameters", Astronomy and Astrophysics, 515: A111, arXiv:1004.1069, Bibcode:2010A&A...515A.111S, doi:10.1051/0004-6361/201014247
3. Randich, S.; et al. (August 1999), "Lithium in population I subgiants", Astronomy and Astrophysics, 348: 487–500, Bibcode:1999A&A...348..487R
4. Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV Data. SIMBAD, Bibcode:1986EgUBV........0M
5. Wilson, R. E. (1953), General Catalogue of Stellar Radial Velocities, Carnegie Institute of Washington D.C., Bibcode:1953GCRV..C......0W

External links

• Image HD 210434