HR 968
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Eridanus |
| Right ascension | 03h 12m 25.75s |
| Declination | −44° 25′ 10.8″ |
| Apparent magnitude (V) | 5.93 |
| Characteristics | |
| Spectral type | F7III+A0V |
| B−V color index | +0.44 |
| Astrometry | |
| Proper motion (μ) | RA: +81.63 mas/yr Dec.: −4.57 mas/yr |
| Parallax (π) | 23.53±0.62 mas |
| Distance | 139 ± 4 ly (42 ± 1 pc) |
| Absolute magnitude (MV) | +2.78 |
| Orbit | |
| Period (P) | 44.93 yr |
| Semi-major axis (a) | 0.399″ |
| Eccentricity (e) | 0.891 |
| Inclination (i) | 180° |
| Details | |
| A | |
| Mass | 1.34 M☉ |
| B | |
| Mass | 1.24 M☉ |
| C | |
| Mass | 0.87 M☉ |
| Other designations | |
| CD−44°1025, HD 20121, HR 968, SAO 216209 | |
| Database references | |
| SIMBAD | data |
| A | |
| B | |
| C | |
HR 968 (HD 20121) is a triple star in the Eridanus constellation with an apparent magnitude of 5.93. A close pair, a magnitude 6.6 F-type star and a magnitude 6.9 A-type star, are accompanied by a fainter common proper motion companion 3.6″ away. The three combined are barely visible to the naked eye. It had the Bayer designation u Eridani by Nicolas Louis de Lacaille before Francis Baily dropped the title.