  | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Perseus |
| Right ascension | 02h 59m 03.67639s[1] |
| Declination | 35° 10′ 59.2865″[1] |
| Apparent magnitude (V) | 4.94[2] |
| Characteristics | |
| Spectral type | K2III[3] |
| U−Bcolor index | +1.28[4] |
| B−Vcolor index | +1.25[4] |
| Astrometry | |
| Radial velocity (Rv) | −36.97[5] km/s |
| Proper motion (μ) | RA: −45.920[1]mas/yr Dec.: +5.632[1]mas/yr |
| Parallax (π) | 9.6661±0.1963 mas[1] |
| Distance | 337 ± 7 ly (103 ± 2 pc) |
| Absolute magnitude (MV) | -0.32[2] |
| Details[6] | |
| Mass | 1.59 M☉ |
| Radius | 23.56 R☉ |
| Luminosity | 185 L☉ |
| Surface gravity (log g) | 1.91 cgs |
| Temperature | 4,391 K |
| Metallicity[Fe/H] | −0.07 dex |
| Rotational velocity (v sin i) | < 1.9[7] km/s |
| Other designations | |
| 24 Per,BD+34°550,FK5 1082,GC 3575,HD 18449,HIP 13905,HR 882,SAO 56052[8] | |
| Database references | |
| SIMBAD | data |
24 Persei is astar in the northernconstellation ofPerseus, located around 337 light years from the Sun. It is visible to the naked eye as a faint, orange-hued star with anapparent visual magnitude of 4.94.[2] The object is moving closer to the Earth with a heliocentricradial velocity of −37 km/s.[5]
This is an aginggiant star with astellar classification of K2 III,[3] which indicates it has exhausted the hydrogen at its core andevolved away from themain sequence. It has 1.59 times themass of the Sun and has expanded to about 24 times theSun's radius. The star is radiating 185 times theSun's luminosity from its enlargedphotosphere at aneffective temperature of 4,391 K.[6]
