Astronomy:HD 112028
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Short description: Star in the constellation Camelopardalis
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Camelopardalis[1] |
| Right ascension | 12h 49m 13.7347s[2] |
| Declination | +83° 24′ 46.432″[2] |
| Apparent magnitude (V) | 5.28[3] |
| Characteristics | |
| Spectral type | A0 IIsp[4] |
| U−B color index | −0.06[3] |
| B−V color index | −0.03[3] |
| Astrometry | |
| Radial velocity (Rv) | +2.3[5] km/s |
| Proper motion (μ) | RA: −31.517(152)[2] mas/yr Dec.: 20.774(158)[2] mas/yr |
| Parallax (π) | 7.7658 ± 0.1164[2] mas |
| Distance | 420 ± 6 ly (129 ± 2 pc) |
| Details | |
| Mass | 2.4[6] M☉ |
| Radius | 4.4[6] R☉ |
| Luminosity | 135[6] L☉ |
| Surface gravity (log g) | 2.88±0.13[7] cgs |
| Temperature | 9,443±345[7] K |
| Metallicity [Fe/H] | −0.39±0.22[7] dex |
| Rotation | 0.799 days[8] |
| Rotational velocity (v sin i) | 275[9] km/s |
| Age | 387[10] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 112028 is an evolved star in the northern constellation of Camelopardalis. It has spectral peculiarities that have been interpreted as a shell, and also relatively weak magnesium and silicon lines. Its spectral class has been variously assigned between B9 and A2, and its luminosity class between a subgiant and bright giant.[11]
At an angular separation of 21.47″ is the slightly fainter spectroscopic binary HD 112014, consisting of a pair of A-type main sequence stars. HD 112028 and HD 112014 together are known as the binary star Struve 1694.[12]
References
- ↑ Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific 99 (617): 695. doi:10.1086/132034. Bibcode: 1987PASP...99..695R Constellation record for this object at VizieR.
- ↑ 2.0 2.1 2.2 2.3 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940 Gaia DR3 record for this source at VizieR.
- ↑ 3.0 3.1 3.2 Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV Data. SIMBAD, Bibcode: 1986EgUBV........0M
- ↑ Abt, Helmut A.; Morrell, Nidia I. (July 1995). "The Relation between Rotational Velocities and Spectral Peculiarities among A-Type Stars". Astrophysical Journal Supplement 99: 135. doi:10.1086/192182. Bibcode: 1995ApJS...99..135A.
- ↑ Gontcharov, G. A. (November 2006), "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system", Astronomy Letters 32 (11): 759–771, doi:10.1134/S1063773706110065, Bibcode: 2006AstL...32..759G.
- ↑ 6.0 6.1 6.2 Stassun, Keivan G. et al. (2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal 158 (4): 138. doi:10.3847/1538-3881/ab3467. Bibcode: 2019AJ....158..138S.
- ↑ 7.0 7.1 7.2 Prugniel, P.; Vauglin, I.; Koleva, M. (2011), "The atmospheric parameters and spectral interpolator for the MILES stars", Astronomy & Astrophysics 531: A165, doi:10.1051/0004-6361/201116769, Bibcode: 2011A&A...531A.165P.
- ↑ Balona, Luis A.; Ozuyar, Dogus (2021). "TESS Observations of be Stars: General Characteristics and the Impulsive Magnetic Rotator Model". The Astrophysical Journal 921 (1): 5. doi:10.3847/1538-4357/ac1a77. Bibcode: 2021ApJ...921....5B.
- ↑ Uesugi, Akira; Fukuda, Ichiro (1970), "Catalogue of rotational velocities of the stars", Contributions from the Institute of Astrophysics and Kwasan Observatory (University of Kyoto), Bibcode: 1970crvs.book.....U.
- ↑ Gontcharov, G. A. (2012). "Dependence of kinematics on the age of stars in the solar neighborhood". Astronomy Letters 38 (12): 771. doi:10.1134/S1063773712120031. Bibcode: 2012AstL...38..771G.
- ↑ Skiff, B. A (2014). "VizieR Online Data Catalog: Catalogue of Stellar Spectral Classifications (Skiff, 2009-2016)". VizieR On-line Data Catalog: B/Mk. Originally Published in: Lowell Observatory (October 2014) 1. Bibcode: 2014yCat....1.2023S.
- ↑ Eggleton, P. P.; Tokovinin, A. A. (September 2008). "A catalogue of multiplicity among bright stellar systems". Monthly Notices of the Royal Astronomical Society 389 (2): 869–879. doi:10.1111/j.1365-2966.2008.13596.x. Bibcode: 2008MNRAS.389..869E.
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