Delta Leporis
Star in the constellation Lepus
From Wikipedia, the free encyclopedia
Delta Leporis which is latinized from δ Leporis is a solitary,[10] orange-hued star in the southern constellation of Lepus. It is visible to the naked eye with an apparent visual magnitude of 3.85.[2] Based upon an annual parallax shift of 28.68 mas,[1] it is 114 light years distant from Earth.
 | |
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Lepus |
| Right ascension | 05h 51m 19.29613s[1] |
| Declination | −20° 52′ 44.7232″[1] |
| Apparent magnitude (V) | 3.85[2] |
| Characteristics | |
| Spectral type | K1 IV Fe−0.5[3] or K0 IIIb Fe−1.5 CH0.5[4] |
| U−B color index | +0.71[2] |
| B−V color index | +0.98[2] |
| Astrometry | |
| Radial velocity (Rv) | +100.20[5] km/s |
| Proper motion (μ) | RA: +229.49[1] mas/yr Dec.: −648.41[1] mas/yr |
| Parallax (π) | 28.68±0.17 mas[1] |
| Distance | 113.7 ± 0.7 ly (34.9 ± 0.2 pc) |
| Absolute magnitude (MV) | +1.04[6] |
| Details | |
| Mass | 0.94[6][7] M☉ |
| Radius | 10.01±0.43[7] R☉ |
| Luminosity | 45.7[6] L☉ |
| Surface gravity (log g) | 2.41±0.10[7] cgs |
| Temperature | 4,684±80[7] K |
| Metallicity [Fe/H] | −0.68±0.08[7] dex |
| Rotational velocity (v sin i) | 0[8] km/s |
| Age | 10.7[6] Gyr |
| Other designations | |
| δ Lep, 15 Lep, BD−20°1211, FK5 222, GC 7362, HD 39364, HIP 27654, HR 2035, SAO 170926, LHS 1792[9] | |
| Database references | |
| SIMBAD | data |
This is an old, evolved K-type star with an age of about 10.7 billion years.[6] Keenan and McNeil (1989) classified it as K0 IIIb Fe−1.5 CH0.5,[4] indicating it is a giant star showing a deficiency of iron and an excess of cyanogen in its atmosphere. However, Gray et al. (2006) listed it as K1 IV Fe−0.5,[3] which would suggest a less evolved subgiant star. It may be a red clump star, which indicates it is generating energy through helium fusion at its core.[11]
It has 94% of the Sun's mass, but a radius 10 times wider.[7] It is radiating 46 times the Sun's luminosity from its photosphere[6] at an effective temperature of 4,660 K.[12] It is a Population II star.[7]