HD 112028

Last updated
HD 112028
Observation data
Epoch J2000       Equinox J2000
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) mas/yr [2]
Dec.: 20.774(158) mas/yr [2]
Parallax (π)7.7658±0.1164  mas [2]
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
BD+84 290, HD  112028, HIP  62572, HR  4893, SAO  2102, Struve 1694A
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

  1. ↑ Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific . 99 (617): 695. Bibcode:1987PASP...99..695R. doi: 10.1086/132034 . Constellation record for this object at VizieR.
  2. 1 2 3 4 5 Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv: 2208.00211 . Bibcode:2023A&A...674A...1G. doi: 10.1051/0004-6361/202243940 . S2CID   244398875. Gaia DR3 record for this source at VizieR.
  3. 1 2 3 Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV Data. SIMBAD, Bibcode:1986EgUBV........0M
  4. ↑ 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. Bibcode:1995ApJS...99..135A. doi: 10.1086/192182 .
  5. ↑ 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, arXiv: 1606.08053 , Bibcode:2006AstL...32..759G, doi:10.1134/S1063773706110065, S2CID   119231169.
  6. 1 2 3 Stassun, Keivan G.; et al. (2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal. 158 (4): 138. arXiv: 1905.10694 . Bibcode:2019AJ....158..138S. doi: 10.3847/1538-3881/ab3467 .
  7. 1 2 3 Prugniel, P.; Vauglin, I.; Koleva, M. (2011), "The atmospheric parameters and spectral interpolator for the MILES stars", Astronomy & Astrophysics, 531: A165, arXiv: 1104.4952 , Bibcode:2011A&A...531A.165P, doi:10.1051/0004-6361/201116769, S2CID   54940439.
  8. ↑ 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. arXiv: 2008.06288 . Bibcode:2021ApJ...921....5B. doi: 10.3847/1538-4357/ac1a77 .
  9. ↑ 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.
  10. ↑ Gontcharov, G. A. (2012). "Dependence of kinematics on the age of stars in the solar neighborhood". Astronomy Letters. 38 (12): 771. arXiv: 1606.08814 . Bibcode:2012AstL...38..771G. doi:10.1134/S1063773712120031.
  11. ↑ 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.
  12. ↑ 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. arXiv: 0806.2878 . Bibcode:2008MNRAS.389..869E. doi: 10.1111/j.1365-2966.2008.13596.x . S2CID   14878976.
This page is based on this Wikipedia article
Text is available under the CC BY-SA 4.0 license; additional terms may apply.
Images, videos and audio are available under their respective licenses.