24 Capricorni
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Capricornus |
| Right ascension | 21h 07m 07.66733s |
| Declination | −25° 00′ 21.0790″ |
| Apparent magnitude (V) | +4.49 |
| Characteristics | |
| Evolutionary stage | AGB |
| Spectral type | M1− III |
| B−V color index | 1.604±0.005 |
| Astrometry | |
| Radial velocity (Rv) | +32.1±0.8 km/s |
| Proper motion (μ) | RA: −28.09 mas/yr Dec.: −44.14 mas/yr |
| Parallax (π) | 7.15±0.22 mas |
| Distance | 460 ± 10 ly (140 ± 4 pc) |
| Absolute magnitude (MV) | −1.24 |
| Details | |
| Radius | 54.06+1.88 −2.72 R☉ |
| Luminosity | 611±41 L☉ |
| Temperature | 3,903+102 −66 K |
| Other designations | |
| A Capricorni, 24 Cap, CD−25° 15235, FK5 791, GC 29490, HD 200914, HIP 104234, HR 8080, SAO 190025, ADS 14632, CCDM J21071-2500 | |
| Database references | |
| SIMBAD | data |
24 Capricorni or A Capricorni is a single star in the southern constellation of Capricornus. This object is visible to the naked eye as a faint, red-hued star with an apparent visual magnitude of +4.49. It is approximately 460 light years from the Sun, based on parallax. The star is moving further from the Earth with a heliocentric radial velocity of +32 km/s.
This is an aging red giant, currently on the asymptotic giant branch, with a stellar classification of M1− III; a star that has exhausted the supply of hydrogen at its core and expanded to 54 times the Sun's radius. It is radiating 611 times the Sun's luminosity from its enlarged photosphere at an effective temperature of 3,903 K.