HD 112028

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]

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

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]