HD 194953

HD 194953 (HR 7824) is a solitary star in the equatorial constellation Delphinus. It is faintly visible to the naked eye with an apparent magnitude of 6.19^[2] and is located 414 light years away.^[1] However, it is approaching the Solar System with a heliocentric radial velocity of −28 km/s.^[5]

HD 194953

Observation data Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation	Delphinus
Right ascension	20h 28m 16.7824s[1]
Declination	+02° 56′ 14.0305″[1]
Apparent magnitude (V)	6.19±0.01[2]
Characteristics
Spectral type	G8 III/IV[3]
U−B color index	+0.56[4]
B−V color index	+0.90[4]
Astrometry
Radial velocity (Rv)	−28±0.4[5] km/s
Proper motion (μ)	RA: +50.801 mas/yr[1] Dec.: −5.249 mas/yr[1]
Parallax (π)	7.8706±0.1437 mas[1]
Distance	414 ± 8 ly (127 ± 2 pc)
Absolute magnitude (MV)	+0.74[6]
Details
Mass	2.38[7] M☉
Radius	10.22[8] R☉
Luminosity	53.7[9] L☉
Surface gravity (log g)	2.88[10] cgs
Temperature	5,101±122[8] K
Metallicity [Fe/H]	−0.11[10] dex
Rotational velocity (v sin i)	2.4±1.2[11] km/s
Age	640[7] Myr
Other designations
6 G. Delphini, AG+02°2586, BD+02°4175, GC 28470, HD 194953, HIP 100969, HR 7824, SAO 125843[12][13]
Database references
SIMBAD	data

HD 194953 has a stellar classification of G8 III/IV^[3] — a blended luminosity class of a subgiant and giant. It has 2.38 times the mass of the Sun^[7] and an enlarged radius of 10.2 R_☉^[8] at an age of 640 million years.^[7] It radiates at 54 times the luminosity of the Sun^[9] from its photosphere at an effective temperature of 5,101 K,^[8] giving a yellow hue. HD 194953 is slightly metal deficient with an iron abundance 78% that of the Sun^[10] and spins leisurely with a projected rotational velocity of about 2.4 km/s.^[11]