HD 222399

HD 222399
Observation data; Epoch J2000 Equinox J2000
Constellation	Andromeda
	A
Right ascension	23h 40m 02.8168s
Declination	+37° 39′ 09.508″
Apparent magnitude (V)	6.51
	A
Right ascension	23h 40m 03.1960s
Declination	+37° 38′ 55.218″
Apparent magnitude (V)	10.57
Characteristics
Evolutionary stage	main sequence
Spectral type	F2IV
U−B color index	+0.10
B−V color index	+0.35
Astrometry
A
Radial velocity (Rv)	−19.73±0.17 km/s
Proper motion (μ)	RA: −8.669 mas/yr ; Dec.: −81.166 mas/yr
Parallax (π)	10.8719±0.0178 mas
Distance	300.0 ± 0.5 ly ; (92.0 ± 0.2 pc)
Absolute magnitude (MV)	+1.70
B
Radial velocity (Rv)	−19.59±0.19 km/s
Proper motion (μ)	RA: −6.695 mas/yr ; Dec.: −83.249 mas/yr
Parallax (π)	10.9323±0.0127 mas
Distance	298.3 ± 0.3 ly ; (91.5 ± 0.1 pc)
Details
A
Mass	1.77 M☉
Radius	1.52 R☉
Luminosity	17 L☉
Surface gravity (log g)	3.78 cgs
Temperature	6,939 K
Metallicity [Fe/H]	−0.04 dex
Rotational velocity (v sin i)	55 km/s
Age	1.4 Gyr
B
Mass	0.80 M☉
Radius	0.82 R☉
Luminosity	0.35 L☉
Surface gravity (log g)	4.51 cgs
Temperature	4,888 K
Metallicity [Fe/H]	0.10 dex
Age	1.2 Gyr
Other designations
	BD+36°5098, HD 222399, HIP 116781, HR 8973, SAO 73422
Database references
SIMBAD	A
	B

HD 222399 is a double star in the northern constellation of Andromeda. The magnitude 6.5 primary is an F-type subgiant star with a stellar classification of F2IV. It has a magnitude 10.57 companion at an angular separation of 14.7″ along a position angle of 162° (as of 2002).^[13]

Quick facts Observation data Epoch J2000 Equinox J2000, Apparent magnitude (V) ...

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Observation data Epoch J2000 Equinox J2000
Constellation	Andromeda^[1]
A
Right ascension	23^h 40^m 02.8168^s^[2]
Declination	+37° 39′ 09.508″^[2]
Apparent magnitude (V)	6.51^[3]
A
Right ascension	23^h 40^m 03.1960^s^[4]
Declination	+37° 38′ 55.218″^[4]
Apparent magnitude (V)	10.57^[3]
Characteristics
Evolutionary stage	main sequence^[2]^[5]
Spectral type	F2IV^[6]
U−B color index	+0.10^[7]
B−V color index	+0.35^[7]
Astrometry
A
Radial velocity (R_v)	−19.73±0.17^[2] km/s
Proper motion (μ)	RA: −8.669^[2] mas/yr Dec.: −81.166^[2] mas/yr
Parallax (π)	10.8719±0.0178 mas^[2]
Distance	300.0 ± 0.5 ly (92.0 ± 0.2 pc)
Absolute magnitude (M_V)	+1.70^[8]
B
Radial velocity (R_v)	−19.59±0.19^[4] km/s
Proper motion (μ)	RA: −6.695^[4] mas/yr Dec.: −83.249^[4] mas/yr
Parallax (π)	10.9323±0.0127 mas^[4]
Distance	298.3 ± 0.3 ly (91.5 ± 0.1 pc)
Details
A
Mass	1.77^[9] `M`_☉
Radius	1.52^[10] `R`_☉
Luminosity	17^[10] `L`_☉
Surface gravity (log g)	3.78^[9] cgs
Temperature	6,939^[10] K
Metallicity [Fe/H]	−0.04^[9] dex
Rotational velocity (v sin i)	55^[11] km/s
Age	1.4^[9] Gyr
B
Mass	0.80^[10] `M`_☉
Radius	0.82^[10] `R`_☉
Luminosity	0.35^[10] `L`_☉
Surface gravity (log g)	4.51^[9] cgs
Temperature	4,888^[10] K
Metallicity [Fe/H]	0.10^[12] dex
Age	1.2^[4] Gyr
Other designations
BD+36°5098, HD 222399, HIP 116781, HR 8973, SAO 73422
Database references
SIMBAD	A
	B

References