HD 68375

HD 68375 (HR 3216) is a solitary^[15] star in the northern circumpolar constellation Camelopardalis. It is faintly visible to the naked eye with an apparent magnitude of 5.54^[3] and is estimated to be 289 light years distant.^[2] However, it is receding with a heliocentric radial velocity of 4.33 km/s.^[7]

HD 68375

Observation data Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation	Camelopardalis[1]
Right ascension	08h 19m 32.2891s[2]
Declination	+75° 45′ 24.866″[2]
Apparent magnitude (V)	5.54±0.01[3]
Characteristics
Evolutionary stage	Horizontal branch[4]
Spectral type	G8 III[5]
B−V color index	+0.9[6]
Astrometry
Radial velocity (Rv)	4.33±0.16[7] km/s
Proper motion (μ)	RA: +32.404 mas/yr[2] Dec.: +15.893 mas/yr[2]
Parallax (π)	11.2853±0.0516 mas[2]
Distance	289 ± 1 ly (88.6 ± 0.4 pc)
Absolute magnitude (MV)	+0.88[1]
Details
Mass	1.91[8] M☉
Radius	8.99[9] R☉
Luminosity	49.4±0.5[10] L☉
Surface gravity (log g)	2.77[11] cgs
Temperature	5,078±5[9] K
Metallicity [Fe/H]	−0.12±0.01[12] dex
Rotational velocity (v sin i)	1.3±1.4[13] km/s
Age	1.31[12] Gyr
Other designations
AG+75°385, BD+76°310, FK5 310, GC 11246, HD 68375, HIP 40793, HR 3216, SAO 6487[14]
Database references
SIMBAD	data

HD 68375 has a stellar classification of G8 III,^[5] indicating that it is a red giant. It is currently on the horizontal branch, generating energy via fusion inside a helium core. Specifically, it is a red clump star, at the cool end of the horizontal branch where stars with near-solar metallicity are found.^[4] After approximately 1 billion years,^[12] the star now has a radius of 9 R_☉ and an effective temperature of 5,078 K,^[9] giving a yellow hue. Nevertheless, it has nearly double the mass of the Sun^[8] and radiates at 49 times the luminosity of the Sun^[10] from its enlarged photosphere. HD 68375 is slightly metal deficient with a metallicity 76% that of the Sun^[12] and spins with a poorly constrained projected rotational velocity of 1.3 km/s.^[13]