Eta Leporis
Star Eta Leporis |
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AladinLite | |||||||||||||||||||||||
Observation dates equinox : J2000.0 , epoch : J2000.0 |
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Constellation | Hare | ||||||||||||||||||||||
Right ascension | 05 h 56 m 24.29 s | ||||||||||||||||||||||
declination | -14 ° 10 ′ 3.7 ″ | ||||||||||||||||||||||
Apparent brightness | 3.72 likes | ||||||||||||||||||||||
Typing | |||||||||||||||||||||||
B − V color index | +0.33 | ||||||||||||||||||||||
U − B color index | +0.01 | ||||||||||||||||||||||
R − I index | +0.16 | ||||||||||||||||||||||
Spectral class | F2 V | ||||||||||||||||||||||
Astrometry | |||||||||||||||||||||||
Radial velocity | −2.4 ± 0.9 km / s | ||||||||||||||||||||||
parallax | 66.47 ± 0.74 mas | ||||||||||||||||||||||
distance | 49.1 ± 0.5 ly 15.0 ± 0.2 pc |
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Visual absolute brightness M vis | 2.83 mag | ||||||||||||||||||||||
Proper movement | |||||||||||||||||||||||
Rec. Share: | −42.23 mas / a | ||||||||||||||||||||||
Dec. portion: | 139.02 mas / a | ||||||||||||||||||||||
Physical Properties | |||||||||||||||||||||||
Dimensions | 1.42 (1.38 to 1.47) M ☉ | ||||||||||||||||||||||
radius | 1.5 R ☉ | ||||||||||||||||||||||
Effective temperature | 6,900 K | ||||||||||||||||||||||
Metallicity [Fe / H] | −0.25 | ||||||||||||||||||||||
Age | 1.8 (1.5 to 1.9) billion a | ||||||||||||||||||||||
Other names and catalog entries |
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Eta Leporis ( η Leporis , short η Lep , also 16 Leporis and Gliese 225 ) is a main sequence star of the spectral class F in the constellation Rabbit . At a distance of approximately 49 light years, it still belongs to the stellar neighborhood of the sun . With an apparent magnitude of 3.72 mag, Eta Leporis can be seen with the naked eye a little southwest of the bright star Saiph in the constellation Orion or west of Arneb ( Alpha Leporis ).
An infrared excess around Eta Leporis was observed with the Spitzer Space Telescope , which is attributed to a disk of debris that extends 1 to 16 AU from the star.
Individual evidence
- ↑ a b c d e f SIMBAD: eta Lep. Retrieved July 5, 2015 .
- ↑ a b c VizieR: HR 2085. Accessed July 5, 2015 .
- ↑ a b c d e VizieR: HD 40136. Accessed July 5, 2015 .
- ^ Lawler, SM et al .: Explorations Beyond the Snow Line: Spitzer / IRS Spectra of Debris Disks Around Solar-type Stars. Retrieved July 5, 2015 .