Eta Leporis
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Lepus |
| Right ascension | 05h 56m 24.2929s[1] |
| Declination | −14° 10′ 03.721″[1] |
| Apparent magnitude (V) | 3.719[1] |
| Characteristics | |
| Spectral type | F2V[1] |
| U−B color index | +0.01[2] |
| B−V color index | +0.33[2] |
| R−I color index | +0.16[2] |
| Astrometry | |
| Radial velocity (Rv) | −2.4 ± 0.9[1] km/s |
| Proper motion (μ) | RA: −42.23[1] mas/yr Dec.: 139.02[1] mas/yr |
| Parallax (π) | 66.47 ± 0.74 mas[1] |
| Distance | 49.1 ± 0.5 ly (15.0 ± 0.2 pc) |
| Absolute magnitude (MV) | 2.83[3] |
| Details | |
| Mass | 1.42 (1.38 to 1.47)[4] M☉ |
| Radius | 1.5[5] R☉ |
| Temperature | 6900[4] K |
| Metallicity | [Fe/H] = −0.25[4] |
| Rotational velocity (v sin i) | 17[4] km/s |
| Age | 1.8 (1.5 to 1.9) × 109[4] years |
| Other designations | |
| Database references | |
| SIMBAD | data |
Eta Leporis (Eta Lep, η Leporis, η Lep) is a F-type main sequence star in the constellation of Lepus.[1] It has an apparent visual magnitude of approximately 3.719.[1] Using the IRS instrument on the Spitzer Space Telescope, excess infrared emission has been observed from the star, which can be modelled by a dust disk extending from 1 to 16 astronomical units from the star.[6]
References
- ^ a b c d e f g h i j k * eta Lep -- Star, database entry, SIMBAD. Accessed on line February 3, 2011.
- ^ a b c HR 2085, database entry, The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version), D. Hoffleit and W. H. Warren, Jr., CDS ID V/50. Accessed on line February 3, 2011.
- ^ From apparent magnitude and parallax.
- ^ a b c d e HD 40136, database entry, The Geneva-Copenhagen Survey of Solar neighbourhood, J. Holmberg et al., 2007, CDS ID V/117A. Accessed on line February 3, 2011.
- ^ HD 40136, database entry, Catalog of Apparent Diameters and Absolute Radii of Stars (CADARS), 3rd edition, L. E. Pasinetti-Fracassini, L. Pastori, S. Covino, and A. Pozzi, CDS ID II/224. Accessed on line February 3, 2011.
- ^ Table 7, Explorations Beyond the Snow Line: Spitzer/IRS Spectra of Debris Disks Around Solar-type Stars, S. M. Lawler et al., The Astrophysical Journal 705, #1 (November 2009), pp. 89-111, doi:10.1088/0004-637X/705/1/89, Bibcode:2009ApJ...705...89L.
