Eta Leporis

η Leporis

Observation data Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation	Lepus
Right ascension	05^h 56^m 24.2929^s[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[1] mas
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] dex
Rotational velocity (v sin i)	17[4] km/s
Age	1.8 (1.5 to 1.9)[4] Gyr
Other designations
η Lep, Eta Leporis, Eta Lep, 16 Leporis, 16 Lep, BD−14 1286, FK5 226, GC 7492, GJ 225, HD 40136, HIP 28103, HR 2085, PPM 216474, SAO 150957.[1]
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

1. * eta Lep -- Star, database entry, SIMBAD. Accessed on line February 3, 2011.
2. 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.
3. From apparent magnitude and parallax.
4. 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.
5. 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.
6. 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.