Upsilon3 Eridani
Upsilon3 Eridani (υ3 Eridani, abbreviated Upsilon3 Eri, υ3 Eri), officially named Beemim /ˈbiːməm/, is a star in the constellation of Eridanus. It is visible to the naked eye with an apparent visual magnitude of 3.96 The distance to this star, based upon an annual parallax shift of 11.01 mas, is around 296 light-years.
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Eridanus |
| Right ascension | 04h 24m 02.21725s |
| Declination | −34° 01′ 00.6542″ |
| Apparent magnitude (V) | 3.96 |
| Characteristics | |
| Spectral type | K4 III |
| U−B color index | +1.80 |
| B−V color index | +1.49 |
| Astrometry | |
| Radial velocity (Rv) | +24.1±0.7 km/s |
| Proper motion (μ) | RA: +73.77 mas/yr Dec.: +56.70 mas/yr |
| Parallax (π) | 11.01 ± 0.37 mas |
| Distance | 296 ± 10 ly (91 ± 3 pc) |
| Absolute magnitude (MV) | −0.82 |
| Details | |
| Radius | 54 R☉ |
| Luminosity | 426 L☉ |
| Surface gravity (log g) | 1.71 cgs |
| Temperature | 3,990 K |
| Metallicity [Fe/H] | −0.23 dex |
| Other designations | |
| Database references | |
| SIMBAD | data |
This is an evolved K-type giant star with a stellar classification of K4 III. It has about 54 times the radius of the Sun and radiates 426 times the solar luminosity from its outer atmosphere at an effective temperature of 3,990 K.
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