Epsilon Reticuli
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Double star ε reticuli |
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Observation dates equinox : J2000.0 , epoch : J2000.0 |
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| AladinLite | ||||||||||||||||||||||||||||||||
| Constellation | network | |||||||||||||||||||||||||||||||
| Right ascension | 04 h 16 m 29 s | |||||||||||||||||||||||||||||||
| declination | -59 ° 18 ′ 08 ″ | |||||||||||||||||||||||||||||||
| Apparent brightness | 4.4 likes | |||||||||||||||||||||||||||||||
| Known exoplanets |
1 |
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| Astrometry | ||||||||||||||||||||||||||||||||
| Radial velocity | (+29.3 ± 0.9) km / s | |||||||||||||||||||||||||||||||
| parallax | (54.84 ± 0.50) mas | |||||||||||||||||||||||||||||||
| distance | (59.5 ± 0.5) ly ((18.2 ± 0.2) pc ) |
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| Proper movement : | ||||||||||||||||||||||||||||||||
| Rec. Share: | −48 mas / a | |||||||||||||||||||||||||||||||
| Dec. portion: | −168 mas / a | |||||||||||||||||||||||||||||||
| Individual data | ||||||||||||||||||||||||||||||||
| Names | A; B. | |||||||||||||||||||||||||||||||
| Observation data: | ||||||||||||||||||||||||||||||||
| Apparent brightness | A. | 4.4 likes | ||||||||||||||||||||||||||||||
| B. | 12.5 mag | |||||||||||||||||||||||||||||||
| Typing: | ||||||||||||||||||||||||||||||||
| Spectral class | A. | K2 IVa | ||||||||||||||||||||||||||||||
| B. | D. | |||||||||||||||||||||||||||||||
| Other names and catalog entries |
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ε Reticuli ( Epsilon Reticuli , short ε Ret ) is a star system in the constellation Netz, about 60 light years away .
It is a binary system consisting of a subgiants the spectral K2, ε Reticuli A , and a white dwarf , ε Reticuli B . The angular distance between the two components is currently around 13 ", which corresponds to around 240 astronomical units . Ε Reticuli A is orbited by a substellar object.
Exoplanet
ε Reticuli b , sometimes also ε Reticuli Ab , is an exoplanet candidate that orbits ε Reticuli A, discovered through radial velocity measurements . It has an orbital period of around 430 days and has a minimum mass of around 1.6 Jupiter's masses. The orbit has a low eccentricity of approx. 0.1, the major semi-axis measures approx. 1.3 astronomical units .
swell
- SIMBAD page on ε reticuli
- G. Chauvin, A.-M. Lagrange, S. Udry, M. Mayor: Characterization of the long-period companions of the exoplanet host stars: HD 196885, HD 1237 and HD 27442. VLT / NACO and SINFONI near-infrared, follow-up imaging and spectroscopy. In: Astronomy and Astrophysics. Vol. 475, No. 2, 2007, p. 723ff. bibcode : 2007A & A ... 475..723C
- M. Mugrauer, R. Neuhäuser, T. Mazeh: The multiplicity of exoplanet host stars. Spectroscopic confirmation of the companions GJ 3021 B and HD 27442 B, one new planet host triple-star system, and global statistics. In: Astronomy and Astrophysics. Vol. 469, No. 2, 2007, pp. 755ff. bibcode : 2007A & A ... 469..755M