58 Eridani is a main-sequence star in the constellation Eridanus. It is a solar analogue,[12] having similar physical properties to the Sun. The star has a relatively high proper motion across the sky, and it is located 43 light years distant. It is a probable member of the IC 2391 moving group of stars that share a common motion through space.[10]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Eridanus |
| Right ascension | 04h 47m 36.29171s[2] |
| Declination | –16° 56′ 04.04-4″[2] |
| Apparent magnitude (V) | 5.47 - 5.51[3] |
| Characteristics | |
| Evolutionary stage | main sequence[2] |
| Spectral type | G1.5 V CH-0.5[4] |
| U−B color index | +0.13[5] |
| B−V color index | +0.64[5] |
| Variable type | BY Dra[3] |
| Astrometry | |
| Radial velocity (Rv) | 21.60±0.12[2] km/s |
| Proper motion (μ) | RA: +130.264[2] mas/yr Dec.: +169.338[2] mas/yr |
| Parallax (π) | 75.5289 ± 0.0539 mas[2] |
| Distance | 43.18 ± 0.03 ly (13.240 ± 0.009 pc) |
| Absolute magnitude (MV) | 4.87[6] |
| Details | |
| Mass | 1.053±0.007[7] M☉ |
| Radius | 1.00[2] R☉ |
| Luminosity | 0.97±0.05[2] L☉ |
| Surface gravity (log g) | 4.50±0.02[8] cgs |
| Temperature | 5,820±5.7[9] K |
| Metallicity [Fe/H] | 0.030±0.007[8] dex |
| Rotation | 7.6 days[10] |
| Rotational velocity (v sin i) | 3.37±0.11[8] km/s |
| Age | 600[11] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
Characteristics
This is a BY Draconis variable with the designation IX Eridani, which ranges in magnitude from 5.47 down to 5.51 with a period of 11.3 days.[3] The X-ray emissions from this star's corona indicate an age of less than a billion (109) years,[13] compared to 4.6 billion for the Sun, so it is still relatively young for a star of its mass. Starspot activity has also been detected, which varies from year to year.
A circumstellar disc of dust particles has been detectedin orbit around 58 Eridani.[14]
See also
References
External links
- "58 Eridani". SolStation. Archived from the original on 26 June 2006. Retrieved 2006-07-28.
- "Gl 177". ARICNS. 2006-06-06. Archived from the original on March 2, 2004. Retrieved 2015-12-28.