Eta Leporis
Star in the constellation of Lepus
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Eta Leporis, Latinised from η Leporis, is a single,[10] yellow-white-hued star in the southern constellation of Lepus, the hare. It is visible to the naked eye with an apparent visual magnitude of approximately 3.72.[2] The annual parallax shift of 67.21 mas yields a distance estimate of 49 light-years. It is moving closer to the Sun with a radial velocity of â1.6 km/s.[5]
 | |
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Lepus |
| Right ascension | 05h 56m 24.29300s[1] |
| Declination | â14° 10â² 03.7189â³[1] |
| Apparent magnitude (V) | 3.72[2] |
| Characteristics | |
| Spectral type | F2 V[3] |
| UâB color index | +0.01[2] |
| BâV color index | +0.33[2] |
| RâI color index | +0.16[4] |
| Astrometry | |
| Radial velocity (Rv) | â1.6±0.2[5] km/s |
| Proper motion (μ) | RA: â42.06[1] mas/yr Dec.: +139.26[1] mas/yr |
| Parallax (Ï) | 67.21±0.25 mas[1] |
| Distance | 48.5 ± 0.2 ly (14.88 ± 0.06 pc) |
| Absolute magnitude (MV) | +2.85[6] |
| Details | |
| Mass | 1.42[5] Mâ |
| Radius | 1.52[7] Râ |
| Luminosity | 6.03[6] Lâ |
| Surface gravity (log g) | 4.13[5] cgs |
| Temperature | 6,899±80[5] K |
| Metallicity [Fe/H] | â0.19[5] dex |
| Rotational velocity (v sin i) | 26[8] km/s |
| Age | 1.80[5] Gyr |
| Other designations | |
| η Lep, 16 Leporis, BDâ14°1286, FK5 226, GC 7492, GJ 225, HD 40136, HIP 28103, HR 2085, SAO 150957, PPM 216474[9] | |
| Database references | |
| SIMBAD | data |
This is an ordinary F-type main-sequence star with a stellar classification of F2 V.[3] It is about 1.8[5] billion years old and spinning with a projected rotational velocity of 26 km/s.[8] The star has 1.4[5] times the mass of the Sun and 1.5[7] times the Sun's radius. It shines with six[6] times the Sun's luminosity, which is being radiated from its photosphere at an effective temperature of around 6,899 K.[5] Using the IRS instrument on the Spitzer Space Telescope, excess infrared emission has been observed from the star, which can be modeled by a dust disk extending from 1 to 16 astronomical units from Eta Leporis.[11]