HD 45866

HD 45866, also known as HR 2363 is a solitary star^[12] located in the northern circumpolar constellation Camelopardalis. It is faintly visible to the naked eye as an orange-hued star with an apparent magnitude of 5.72.^[3] Gaia DR3 parallax measurements place it 726 light years away and it is currently approaching the Solar System with a heliocentric radial velocity of −16.6 km/s.^[6] At its current distance, HD 45866's brightness is diminished by 0.26 magnitudes due to interstellar dust.^[13] It has an absolute magnitude of −0.89^[1]

HD 45866

Location of HD 45866 on the map (circled)
Observation data Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation	Camelopardalis[1]
Right ascension	06h 40m 28.87701s[2]
Declination	+77° 59′ 44.8179″[2]
Apparent magnitude (V)	5.72±0.01[3]
Characteristics
Spectral type	K5 III[4]
B−V color index	+1.47[5]
Astrometry
Radial velocity (Rv)	−16.6±0.2[6] km/s
Proper motion (μ)	RA: +13.997 mas/yr[2] Dec.: −5.701 mas/yr[2]
Parallax (π)	4.4952±0.0455 mas[2]
Distance	726 ± 7 ly (222 ± 2 pc)
Absolute magnitude (MV)	−0.89[1]
Details
Mass	2.34±0.69[7] M☉
Radius	49.6±2.6[8] R☉
Luminosity	468±8[2] L☉
Surface gravity (log g)	1.62±0.11[7] cgs
Temperature	4,207±140[9] K
Metallicity [Fe/H]	−0.11±0.01[10] dex
Age	1.15+0.51 −0.35[7] Gyr
Other designations
AG+78°144, BD+78°227, FK5 2507, GC 8574, HD 45866, HIP 31940, HR 2363, SAO 5919[11]
Database references
SIMBAD	data

This is an evolved red giant with a stellar classification of K5 III.^[4] It has 2.34 times the mass of the Sun^[7] but it has expanded to nearly 50 times the radius of the Sun^[8] at an age of 1.15 billion years.^[7] It radiates 468 times the luminosity of the Sun^[2] from its photosphere at an effective temperature of 4,207 K.^[9] It has an iron abundance 78% of the Sun's,^[10] making it slightly metal deficient.