Back أزهى (نجم) Arabic Eta Eridani AST Eta Eridani German Eta Eridani Spanish Eta Eridani French एटा ऍरिडानी तारा Hindi Eta Eridani ID Azha Italian エリダヌス座イータ星 Japanese Azha (ster) Dutch
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| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Eridanus |
| Right ascension | 02h 56m 25.64948s[1] |
| Declination | −08° 53′ 53.3221″[1] |
| Apparent magnitude (V) | +3.87[2] |
| Characteristics | |
| Spectral type | K1+ IIIb[3] |
| U−B color index | _0.98[2] |
| B−V color index | +1.12[2] |
| Variable type | suspected[4] |
| Astrometry | |
| Radial velocity (Rv) | −20.32 km/s |
| Proper motion (μ) | RA: +77.36 ± 0.19[1] mas/yr Dec.: −220.16 ± 0.20[1] mas/yr |
| Parallax (π) | 23.89±0.19 mas[1] |
| Distance | 137 ± 1 ly (41.9 ± 0.3 pc) |
| Absolute magnitude (MV) | +0.83[5] |
| Details | |
| Mass | 1.43[6] M☉ |
| Radius | 10.48[6] R☉ |
| Luminosity | 57.5[6] L☉ |
| Surface gravity (log g) | +2.79[6] cgs |
| Temperature | 4,742[6] K |
| Rotational velocity (v sin i) | 2.34[6] km/s |
| Age | 2.66[6] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
Eta Eridani (η Eridani, abbreviated Eta Eri, η Eri), officially named Azha (with a silent 'h', possibly /ˈeɪzə/),[8][7] is a giant star in the constellation of Eridanus. Based on parallax measurements taken during the Hipparcos mission, it is approximately 137 light-years from the Sun.
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IAU-LSNwas invoked but never defined (see the help page). - ^ Davis, George A. (1944). "The pronunciations, derivations, and meanings of a selected list of star names". Popular Astronomy. 52: 8–30. Bibcode:1944PA.....52....8D.