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]
Characteristics
Spectral type K0III-IV[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
Data sources:
Hipparcos Catalogue,
CCDM (2002),
Bright Star Catalogue (5th rev. ed.)

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]

References[edit]

  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 ^ Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV data.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]