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]
| 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 | 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 mas[1] |
| 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 | |
| Database references | |
| SIMBAD | data |
References
edit- ^ 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, S2CID 18759600
- ^ 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, S2CID 118362423
- ^ 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
- ^ Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV Data. SIMBAD, Bibcode:1986EgUBV........0M
- ^ Wilson, R. E. (1953), "General Catalogue of Stellar Radial Velocities", Carnegie Institute Washington D.C. Publication, Carnegie Institute of Washington D.C., Bibcode:1953GCRV..C......0W
External links
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