HD 112028

Last updated
HD 112028
Observation data
Epoch J2000       Equinox J2000
Constellation Camelopardalis
Right ascension 12h 49m 13.58934s [1]
Declination +83° 24 46.4198 [1]
Apparent magnitude  (V)5.28 [2]
Characteristics
Spectral type A0 IIsp [3]
U−B color index −0.06 [2]
B−V color index −0.03 [2]
Astrometry
Radial velocity (Rv)+2.3 [4]  km/s
Proper motion (μ)RA: −31.517±0.152  mas/yr
Dec.: +20.774±0.158 [5]   mas/yr
Parallax (π)7.7658 ± 0.1164  mas [5]
Distance 420 ± 6  ly
(129 ± 2  pc)
Details
Luminosity 174 [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
Rotational velocity (v sin i)275 [8]  km/s
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. [9]

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. [10]

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HD 46815 is a solitary star in the southern constellation Columba. It is faintly visible to the naked eye with an apparent magnitude of 5.4 and is estimated to be 408 light years away. However, it is receding with a heliocentric radial velocity of 32.2 km/s.

References

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  3. 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 .
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  8. 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.
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