23 Andromedae
Template:Location mark Location of 23 Andromedae (circled) | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Andromeda |
| Right ascension | Template:RA[1] |
| Declination | Template:DEC[1] |
| Apparent magnitude (V) | 5.71[2] |
| Characteristics | |
| Spectral type | F0 IV[3] |
| B−V Template:Engvar | Template:Val[2] |
| Astrometry | |
| Radial velocity (Rv) | Template:Val[4] km/s |
| Proper motion (μ) | RA: −123.289[1] mas/yr Dec.: −146.201[1] mas/yr |
| Parallax (π) | 26.8161±0.0858 mas[1] |
| Distance | Template:Rnd ± Template:Rnd ly (Template:Rnd ± Template:Rnd pc) |
| Absolute magnitude (MV) | +3.01[5] |
| Details | |
| Mass | 1.43[6] Template:Solar mass |
| Luminosity | Template:Val[3] Template:Solar luminosity |
| Surface gravity (log g) | 4.25[6] cgs |
| Temperature | Template:Val[6] K |
| Metallicity [Fe/H] | Template:Val[7] dex |
| Rotational velocity (v sin i) | 36[3] km/s |
| Age | 759[6] Myr |
| Metallicity [Fe/H] | {{{metal_fe2}}} dex |
| Other designations | |
| Template:Odlist[8] | |
| Database references | |
| SIMBAD | data |
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23 Andromedae, abbreviated 23 And, is a presumed single[9] star in the constellation Andromeda, although it has been a suspected spectroscopic binary.[10] 23 Andromedae is the Flamsteed designation. Its apparent visual magnitude is 5.71,[2] 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 Template:Val,[1] is 121.6 light years. The star is moving further from the Earth with a heliocentric radial velocity of −27 km/s.[4] It has a relatively high proper motion, traversing the celestial sphere at the rate of Template:Val per year.[11]
The stellar classification of 23 And is F0 IV,[3] 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.[12] The star is around 759[6] million years old with a projected rotational velocity of 36 km/s.[3] It has 1.43[6] times the mass of the Sun and is radiating 50[3] times the Sun's luminosity from its photosphere at an effective temperature of 7,089 K.[6]
References
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