58 Eridani
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| 58 Eridani | |
| Stellar characteristics | |
|---|---|
| Constellation | Eridanus |
| Right ascension (Epoch J2000) | 04h 47m 36.30s |
| Declination (Epoch J2000) | -16° 56' 04.00" |
| Spectral type | G1-3 V |
| Distance from Sol | 43.4 ly |
| Other designations | 58 Eri, HR 1532, Gl 177, Hip 22263, HD 30495, BD-17 954, SAO 149888, LTT 2088. |
58 Eridani is located about 43.4 light-years from Sol. It lies in the northwestern corner of the constellation Eridanus, the River. The star is a yellow-orange main sequence dwarf star of spectral and luminosity type G1-3 V. Similar to Sol[1], this "Solar analogue" may have roughly the same mass, around 96 to 99 percent of its diameter[2][3][4], and 96 percent of its luminosity. It appears to be around 97 percent as enriched than Sol in elements heavier than hydrogen ("metals") based on its abundance of iron[5].
The star is considered to be a nearby, young Solar analogue -- with a spectral type from G0 to K2 and a coronal x-ray luminosity suggesting an age of less than 800 million years[6][7]. Little 10-micron emission from silicate dust in a circumstellar disk around the star was found suggesting that 58 Eridani may be more than 400 million years old although significant excess infrared emission was detected[8].
An Earth-type planet with liquid water on its surface would require a stable orbit centered around 0.96 AU from 58 Eridani -- just under the orbital distance of Earth in the Solar System. Such a planet would have an orbital period lasting close to an Earth year. However, given its conjectured young age, an Earth-sized planet is not likely to have developed an oxygen-rich atmosphere but is likely to be under heavy bombardment by asteroids and comets.
(Data from SolStation.com)
Notes
- ↑ (Giusa Cayrel de Strobel, 1996)
- ↑ (Pasinetti-Fracassini et al, 2001)
- ↑ (Perrin and Karoji, 1987)
- ↑ (Johnson and Wright, 1983, page 655)
- ↑ (B.J. Taylor, 2003)
- ↑ (Gaidos and Gonalez, 2002)
- ↑ (Eric J. Gaidos, 1998)
- ↑ (Gaidos and Koresko, 2003)
