HD 214448 is a binary star system in the equatorial constellation of Aquarius. They orbit each other with a period of around 147 years. The combined mass of the pair is twice that of the Sun.[5]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Aquarius |
| Right ascension | 22h 38m 22.14533s[1] |
| Declination | −07° 53′ 51.2116″[1] |
| Apparent magnitude (V) | 6.23[2] (6.64/8.11)[3] |
| Characteristics | |
| Spectral type | K0III + F2[4] |
| U−B color index | +0.49[2] |
| B−V color index | +0.78[2] |
| Variable type | Suspected[5] |
| Astrometry | |
| Radial velocity (Rv) | −18.34±0.27[6] km/s |
| Proper motion (μ) | RA: +74.25[1] mas/yr Dec.: −0.98[1] mas/yr |
| Parallax (π) | 8.38 ± 0.62 mas[1] |
| Distance | 390 ± 30 ly (119 ± 9 pc) |
| Absolute magnitude (MV) | 0.498[6] |
| Orbit[5] | |
| Period (P) | 147.07±8.09 yr |
| Semi-major axis (a) | 0.249±0.051″ |
| Eccentricity (e) | 0.44±0.37 |
| Inclination (i) | 73.6±6.2° |
| Longitude of the node (Ω) | 110.3±3.3° |
| Argument of periastron (ω) (secondary) | 191.9±14.7° |
| Details | |
| Temperature | 5,645[7] K |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Data sources: | |
| Hipparcos Catalogue, CCDM (2002), Bright Star Catalogue (5th rev. ed.) | |
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 Nicolet, B. (1978), "Photoelectric photometric Catalogue of homogeneous measurements in the UBV System", Astronomy and Astrophysics Supplement Series, 34: 1–49, Bibcode:1978A&AS...34....1N
- ^ Malkov, O. Yu.; et al. (2012), "Dynamical Masses of a Selected Sample of Orbital Binaries", Astronomy & Astrophysics, 546: 5, Bibcode:2012A&A...546A..69M, doi:10.1051/0004-6361/201219774, A69
- ^ Abt, H. A. (September 1985), "Visual multiples. VIII - 1000 MK types", Astrophysical Journal Supplement Series, 59: 95–112, Bibcode:1985ApJS...59...95A, doi:10.1086/191064
- ^ a b c Olevic, D.; Cvetkovic, Z. (2004), "Orbits of 6 Binaries", Serbian Astronomical Journal, 168 (168): 25–36, Bibcode:2004SerAJ.168...25O, doi:10.2298/saj0468025o
- ^ a b Soubiran, C.; et al. (March 2008), "Vertical distribution of Galactic disk stars. IV. AMR and AVR from clump giants", Astronomy and Astrophysics, 480 (1): 91–101, arXiv:0712.1370, Bibcode:2008A&A...480...91S, doi:10.1051/0004-6361:20078788, S2CID 16602121
- ^ Muñoz Bermejo, J.; et al. (May 2013), "A PCA approach to stellar effective temperatures", Astronomy and Astrophysics, 453: A95, arXiv:1303.7218, Bibcode:2013A&A...553A..95M, doi:10.1051/0004-6361/201220961, S2CID 67752733.
External links
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