  | |
| 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−B color index | +1.28[4] |
| B−V color 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 a star in the northern constellation of Perseus, located around 337 light years from the Sun. It is visible to the naked eye as a faint, orange-hued star with an apparent visual magnitude of 4.94.[2] The object is moving closer to the Earth with a heliocentric radial velocity of −37 km/s.[5]
This is an aging giant star with a stellar classification of K2 III,[3] which indicates it has exhausted the hydrogen at its core and evolved away from the main sequence. It has 1.59 times the mass of the Sun and has expanded to about 24 times the Sun's radius. The star is radiating 185 times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,391 K.[6]
