53 Eridani
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Eridanus |
| Right ascension | 04h 38m 10.82486s |
| Declination | −14° 18′ 14.4600″ |
| Apparent magnitude (V) | 3.87 (4.02/6.95) |
| Characteristics | |
| Spectral type | K1III |
| U−B color index | +1.03 |
| B−V color index | +1.09 |
| Astrometry | |
| Radial velocity (Rv) | +43.33±0.28 km/s |
| Proper motion (μ) | RA: −76.59 mas/yr Dec.: −176.78 mas/yr |
| Parallax (π) | 29.69±0.37 mas |
| Distance | 110 ± 1 ly (33.7 ± 0.4 pc) |
| Orbit | |
| Period (P) | 77.4±1.5 yr |
| Semi-major axis (a) | 0.7069±0.0093″ |
| Eccentricity (e) | 0.666±0.017 |
| Inclination (i) | 59.8±1.8° |
| Longitude of the node (Ω) | 171.25±0.96° |
| Periastron epoch (T) | 1976.77±0.26 |
| Argument of periastron (ω) (secondary) | 23.5±1.8° |
| Details | |
| 53 Eri A | |
| Mass | 1.07±0.25 M☉ |
| Radius | 9.8 R☉ |
| Luminosity | 37 L☉ |
| Surface gravity (log g) | 2.49±0.23 cgs |
| Temperature | 4,603 K |
| Metallicity [Fe/H] | −0.11 dex |
| Other designations | |
| BD−14°933, FK5 172, GJ 9160, HD 29503, HIP 21594, HR 1481, SAO 149781, WDS 04382+1418 | |
| Database references | |
| SIMBAD | 53 Eri |
| 53 Eri A | |
| 53 Eri B | |
53 Eridani (abbreviated 53 Eri), also designated l Eridani (l Eri), is a binary star in the constellation of Eridanus. The system has a combined apparent magnitude of 3.87. Parallax estimates made by the Hipparcos spacecraft put it at a distance of about 110 light-years, or 33.7 parsecs, from the Sun.
The two components are designated 53 Eridani A (officially named Sceptrum) and B.