HD 210434

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HD 210434
Observation data
Epoch J2000      Equinox J2000
Constellation Aquarius
Right ascension 22h 10m 33.74601s[1]
Declination −04° 16′ 00.6776″[1]
Apparent magnitude (V) 5.979[2]
Spectral type KG8/0III[3]
U−B color index 0.84[4]
B−V color index 0.981[3]
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
Distance330 ± 10 ly
(102 ± 5 pc)
Absolute magnitude (MV)1.30[3]
Mass2.4[3] M
Surface gravity (log g)3.0[3][2] cgs
Temperature4,928[3][2] K
Metallicity [Fe/H]0.090±0.090[3][2] dex
Rotational velocity (v sin i)3.3[3] km/s
Age630[3] Myr
Other designations
BD-04° 5625, HD 210434, HIP 109466, HR 8453, SAO 145916.
Database references

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]


  1. ^ a b c d e 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. ^ a b c d 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. ^ a b c d e f g h i j k 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 ^ Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV data.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[edit]