Observation data Epoch J2000.0 Equinox J2000.0 ( ICRS) | |
---|---|
Constellation | Perseus |
Right ascension | 02h 17m 59.88750s [1] |
Declination | +57° 53′ 59.3529″ [1] |
Apparent magnitude (V) | 5.757 [2] |
Characteristics | |
Spectral type | K3 III [3] |
B−V color index | 1.203 [2] |
Astrometry | |
Radial velocity (Rv) | 0.72 [2] km/s |
Proper motion (μ) |
RA: +60.568
[1]
mas/
yr Dec.: +5.812 [1] mas/ yr |
Parallax (π) | 7.8492 ± 0.1017 mas [1] |
Distance | 416 ± 5
ly (127 ± 2 pc) |
Absolute magnitude (MV) | 0.26 [4] |
Details | |
Mass | 1.83 [2] M☉ |
Radius | 15.85±0.99 [5] R☉ |
Luminosity | 107.95±1.69 [1] L☉ |
Surface gravity (log g) | 2.3 [5] cgs |
Temperature | 4,560+92 −86 [1] K |
Metallicity [Fe/H] | −0.07 [5] dex |
Rotational velocity (v sin i) | 1.0 [6] km/s |
Age | 2.36 [2] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
8 Persei is a single [8] star in the northern constellation of Perseus, [7] located 416 light years away from the Sun. [1] It is visible to the naked eye as a dim, orange-hued star with an apparent visual magnitude of 5.757. [2] There is an estimated 52% chance that the star may be a member of the Hyades– Pleiades stream of co-moving stars. [9]
With an age of over two billion years, [2] this is an aging red giant of spectral type K3 III, [3] a star that has used up its core hydrogen and is expanding. It has 1.83 [2] times the mass of the Sun and has reached nearly 16 [5] times the Sun's size. The star is radiating 108 [1] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,560 K. [1]
Observation data Epoch J2000.0 Equinox J2000.0 ( ICRS) | |
---|---|
Constellation | Perseus |
Right ascension | 02h 17m 59.88750s [1] |
Declination | +57° 53′ 59.3529″ [1] |
Apparent magnitude (V) | 5.757 [2] |
Characteristics | |
Spectral type | K3 III [3] |
B−V color index | 1.203 [2] |
Astrometry | |
Radial velocity (Rv) | 0.72 [2] km/s |
Proper motion (μ) |
RA: +60.568
[1]
mas/
yr Dec.: +5.812 [1] mas/ yr |
Parallax (π) | 7.8492 ± 0.1017 mas [1] |
Distance | 416 ± 5
ly (127 ± 2 pc) |
Absolute magnitude (MV) | 0.26 [4] |
Details | |
Mass | 1.83 [2] M☉ |
Radius | 15.85±0.99 [5] R☉ |
Luminosity | 107.95±1.69 [1] L☉ |
Surface gravity (log g) | 2.3 [5] cgs |
Temperature | 4,560+92 −86 [1] K |
Metallicity [Fe/H] | −0.07 [5] dex |
Rotational velocity (v sin i) | 1.0 [6] km/s |
Age | 2.36 [2] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
8 Persei is a single [8] star in the northern constellation of Perseus, [7] located 416 light years away from the Sun. [1] It is visible to the naked eye as a dim, orange-hued star with an apparent visual magnitude of 5.757. [2] There is an estimated 52% chance that the star may be a member of the Hyades– Pleiades stream of co-moving stars. [9]
With an age of over two billion years, [2] this is an aging red giant of spectral type K3 III, [3] a star that has used up its core hydrogen and is expanding. It has 1.83 [2] times the mass of the Sun and has reached nearly 16 [5] times the Sun's size. The star is radiating 108 [1] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,560 K. [1]