82 Eridani
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| Observation data Epoch J2000 |
|
|---|---|
| Constellation | Eridanus |
| Right ascension | 03h 19m 55.7s |
| Declination | -43° 04' 11" |
| Apparent magnitude (V) | 4.26 |
| Characteristics | |
| Spectral type | G5V |
| B-V color index | 0.70 |
| U-B color index | 0.22 |
| Variable type | None |
| Astrometry | |
| Radial velocity (Rv) | +86.7 km/s |
| Proper motion (μ) | RA: 3038.08 mas/yr Dec.: 726.34 mas/yr |
| Parallax (π) | 165.01 ± 0.55 mas |
| Distance | 19.77 ± 0.07 ly (6.06 ± 0.02 pc) |
| Absolute magnitude (MV) | 5.35 |
| Details | |
| Mass | 0.97 M☉ |
| Radius | 0.92 R☉ |
| Luminosity | 0.60 L☉ |
| Temperature | 5305 K |
| Metallicity | >29% Sun |
| Rotation | ? |
| Age | 1.0 × 1010 years |
| Other designations | |
82 Eridani is a star about 20.2 light years away from Earth. It is in constellation Eridanus. It is a main sequence star of spectral type G5.
82 G. Eridani (often abbreviated "82 Eridani") is the 82nd star in Eridanus in the now-obscure catalog Uranometria Argentina. The Argentina catalog, compiled by the 19th century astronomer Benjamin Gould, is a southern-hemisphere analog of the more famous Flamsteed catalog, and used a similar numbering scheme. 82 G. Eridani is one of the very few "G." stars still referred to as such.
In terms of luminosity, 82 G. Eridani is marginally dimmer than the Sun, about half as luminous as Tau Ceti or Alpha Centauri B. 82 G. Eridani is a high-velocity star -- it is moving relatively quickly compared to the average -- and hence is probably a member of Population II, generally older stars whose motions take them well outside the plane of the Milky Way. Like many other Population II stars, 82 G. Eridani is somewhat metal-deficient (though much less deficient than many), and is older than the Sun.
In Habitable Planets for Man, Stephen Dole gives 82 G. Eridani his highest estimate for habitability: 5.7%. Four other stars had this figure: Alpha Centauri B, 70 Ophiuchi A, Eta Cassiopeiae A, and Delta Pavonis.
"This star has a 90% chance of life",says http://www.bibliotecapleyades.net/nuevo_universo/82eridani.htm
[edit] External links
- 82 Eridani. SolStation. Retrieved on November 3, 2005.
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