HD 18970

HD 18970
	Location of k Persei (circled)
Observation data; Epoch J2000 Equinox J2000
Constellation	Perseus
Right ascension	03h 05m 32.41223s
Declination	+56° 42′ 20.5858″
Apparent magnitude (V)	4.77
Characteristics
Evolutionary stage	red giant branch
Spectral type	G9.5III
U−B color index	+0.85
B−V color index	+1.02
Astrometry
Radial velocity (Rv)	−46.37 km/s
Proper motion (μ)	RA: −12.72 mas/yr ; Dec.: +70.04 mas/yr
Parallax (π)	15.45±0.27 mas
Distance	211 ± 4 ly ; (65 ± 1 pc)
Absolute magnitude (MV)	0.72
Details
Mass	1.53 M☉
Radius	11 R☉
Luminosity	63.48 L☉
Surface gravity (log g)	2.54 cgs
Temperature	4,900 K
Metallicity [Fe/H]	−0.08 dex
Rotational velocity (v sin i)	< 1.0 km/s
Other designations
	k Persei, BD+56°767, FK5 2217, GC 3674, HIP 14382, HR 918, HD 18970, SAO 23791
Database references
SIMBAD	data

HD 18970 is a class G9.5III^[4] (yellow giant) star in the constellation Perseus. Its apparent magnitude is 4.77^[2] and it is approximately 211 light years away based on parallax.^[1]

Quick Facts Observation data Epoch J2000 Equinox J2000, Constellation ...

Observation data Epoch J2000 Equinox J2000
Location of k Persei (circled)
Constellation	Perseus
Right ascension	03^h 05^m 32.41223^s^[1]
Declination	+56° 42′ 20.5858″^[1]
Apparent magnitude (V)	4.77^[2]
Characteristics
Evolutionary stage	red giant branch^[3]
Spectral type	G9.5III^[4]
U−B color index	+0.85^[5]
B−V color index	+1.02^[5]
Astrometry

Radial velocity (R_v)	−46.37^[6] km/s
Proper motion (μ)	RA: −12.72^[1] mas/yr Dec.: +70.04^[1] mas/yr
Parallax (π)	15.45±0.27 mas^[1]
Distance	211 ± 4 ly (65 ± 1 pc)
Absolute magnitude (M_V)	0.72^[2]

Details

Mass	1.53^[7] `M`_☉
Radius	11^[7] `R`_☉
Luminosity	63.48^[2] `L`_☉
Surface gravity (log g)	2.54^[7] cgs
Temperature	4,900^[8] K
Metallicity [Fe/H]	−0.08^[2] dex
Rotational velocity (v sin i)	< 1.0^[9] km/s

Other designations
k Persei, BD+56°767, FK5 2217, GC 3674, HIP 14382, HR 918, HD 18970, SAO 23791
Database references
SIMBAD	data

References