Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Eridanus |
Right ascension | 04h 31m 52.66831s [1] |
Declination | −00° 02′ 38.4407″ [1] |
Apparent magnitude (V) | 4.91 [2] |
Characteristics | |
Evolutionary stage | giant |
Spectral type | K0/1 III [3] |
U−B color index | +1.41 [4] |
B−V color index | +1.32±0.04 [2] |
Astrometry | |
Radial velocity (Rv) | +15.22±0.35 [1] km/s |
Proper motion (μ) |
RA: −1.149
[1]
mas/
yr Dec.: −7.655 [1] mas/ yr |
Parallax (π) | 4.6579 ± 0.2082 mas [1] |
Distance | 700 ± 30
ly (215 ± 10 pc) |
Absolute magnitude (MV) | −1.59 [2] |
Details | |
Radius | 50.06±1.73 [1] R☉ |
Luminosity | 787.9±40.1 [1] L☉ |
Surface gravity (log g) | 2.0 [5] cgs |
Temperature | 4322+58 −57 [1] K |
Metallicity [Fe/H] | −0.17 [5] dex |
Other designations | |
Database references | |
SIMBAD | data |
45 Eridani is a single [7] star located around 700 light years away from the Sun in the equatorial constellation of Eridanus. It is visible to the naked eye as a faint, orange-hued star with an apparent visual magnitude of 4.91. [2] This body is moving away from the Earth with a heliocentric radial velocity of +15 km/s. [1]
The stellar classification for this star is K0/1 III, [3] which indicates this is an aging K-type giant star that has exhausted the hydrogen supply at its core and expanded. It has reached 50 [1] times the Sun's radius and is radiating 788 [1] times the luminosity of the Sun from its swollen photosphere at an effective temperature of 4,322 K. [1]
Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Eridanus |
Right ascension | 04h 31m 52.66831s [1] |
Declination | −00° 02′ 38.4407″ [1] |
Apparent magnitude (V) | 4.91 [2] |
Characteristics | |
Evolutionary stage | giant |
Spectral type | K0/1 III [3] |
U−B color index | +1.41 [4] |
B−V color index | +1.32±0.04 [2] |
Astrometry | |
Radial velocity (Rv) | +15.22±0.35 [1] km/s |
Proper motion (μ) |
RA: −1.149
[1]
mas/
yr Dec.: −7.655 [1] mas/ yr |
Parallax (π) | 4.6579 ± 0.2082 mas [1] |
Distance | 700 ± 30
ly (215 ± 10 pc) |
Absolute magnitude (MV) | −1.59 [2] |
Details | |
Radius | 50.06±1.73 [1] R☉ |
Luminosity | 787.9±40.1 [1] L☉ |
Surface gravity (log g) | 2.0 [5] cgs |
Temperature | 4322+58 −57 [1] K |
Metallicity [Fe/H] | −0.17 [5] dex |
Other designations | |
Database references | |
SIMBAD | data |
45 Eridani is a single [7] star located around 700 light years away from the Sun in the equatorial constellation of Eridanus. It is visible to the naked eye as a faint, orange-hued star with an apparent visual magnitude of 4.91. [2] This body is moving away from the Earth with a heliocentric radial velocity of +15 km/s. [1]
The stellar classification for this star is K0/1 III, [3] which indicates this is an aging K-type giant star that has exhausted the hydrogen supply at its core and expanded. It has reached 50 [1] times the Sun's radius and is radiating 788 [1] times the luminosity of the Sun from its swollen photosphere at an effective temperature of 4,322 K. [1]