58 Eridani
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| Observation data Epoch J2000 |
|
|---|---|
| Constellation | Eridanus |
| Right ascension | 04h 47m 36.29s |
| Declination | -16° 56′ 04.0″ |
| Apparent magnitude (V) | 5.50 |
| Spectral Characteristics | |
| Spectral type | G3 V |
| U-B color index | 0.14 |
| B-V color index | 0.63 |
| Variable type | None |
| Astrometry | |
| Radial velocity (Rv) | +16.8 km/s |
| Proper motion (μ) | RA: 130.41 mas/yr Dec.: 169.20 mas/yr |
| Parallax (π) | 75.10 ± 0.80 mas |
| Distance | 43.4 ± 0.5 ly (13.3 ± 0.1 pc) |
| Absolute magnitude (MV) | 5.01 |
| Physical Characteristics | |
| Mass | 0.96 M☉ |
| Radius | 0.96 R☉ |
| Luminosity | 0.96 L☉ |
| Temperature | 5,830 K |
| Metallicity | 97% Sun |
| Rotation | 4 km/s.(~12days) |
| Age | ~8 × 108 years |
| Other designations | |
58 Eridani is a main sequence star in the constellation Eridanus. It is considered a solar analogue,[1] which means it has similar physical properties to the Sun. The star has a relatively high proper motion across the sky, and it is located about 44 light years distant.
The x-ray emissions from this star's corona indicate an age of less than a billion (109) years,[2] compared to 4.7 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 detected in orbit around 58 Eridani. [3]
[edit] References
- ^ E.J. Gaidos, G.W. Henry, S.M. Henry (2000). "Spectroscopy and Photometry of Nearby Young Solar Analogs". Astronomical Journal 120: 1006-1013.
- ^ E.J. Gaidos, G. Gonzalez (2002). "Stellar Atmospheres of Nearby Young Solar Analogs". New Astronomy 7: 211-226.
- ^ E. Gaidos, C. Koresko (2004). "A Survey of 10-Micron Silicate Emission from Dust around Young Sun-Like Stars". New Astronomy 9: 33-42.
