23 Andromedae

23 Andromedae

Template:Location mark Location of 23 Andromedae (circled)
Observation data Epoch J2000      Equinox J2000
Constellation	Andromeda
Right ascension	Template:RA
Declination	Template:DEC
Apparent magnitude (V)	5.71
Characteristics
Spectral type	F0 IV
B−V Template:Engvar
Astrometry
Radial velocity (Rv)	km/s
Proper motion (μ)	RA: −123.289 mas/yr Dec.: −146.201 mas/yr
Parallax (π)	26.8161±0.0858 mas
Distance	Template:Rnd ± Template:Rnd ly (Template:Rnd ± Template:Rnd pc)
Absolute magnitude (MV)	+3.01
Details
Mass	1.43 Template:Solar mass
Luminosity	Template:Solar luminosity
Surface gravity (log g)	4.25 cgs
Temperature	K
Metallicity [Fe/H]	dex
Rotational velocity (v sin i)	36 km/s
Age	759 Myr
Metallicity [Fe/H]	{{{metal_fe2}}} dex
Other designations
Template:Odlist
Database references
SIMBAD	data

23 Andromedae, abbreviated 23 And, is a presumed single star in the constellation Andromeda, although it has been a suspected spectroscopic binary. 23 Andromedae is the Flamsteed designation. Its apparent visual magnitude is 5.71, which indicates it is dimly visible to the naked eye under good viewing conditions. The distance to 23 And, as determined from its annual parallax shift of , is 121.6 light years. The star is moving further from the Earth with a heliocentric radial velocity of −27 km/s. It has a relatively high proper motion, traversing the celestial sphere at the rate of per year.

The stellar classification of 23 And is F0 IV, matching an F-type subgiant star that is in the process of evolving into a red giant. It displays a slight microvariability with a frequency of 0.85784 d⁻¹ and an amplitude of 0.0062 magnitude. The star is around 759 million years old with a projected rotational velocity of 36 km/s. It has 1.43 times the mass of the Sun and is radiating 50 times the Sun's luminosity from its photosphere at an effective temperature of 7,089 K.