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Star in the constellation Leo Minor From Wikipedia, the free encyclopedia
34 Leonis Minoris (34 LMi), also known as HD 91365 or 11 H. Leonis Minoris is a solitary star[13] located in the northern constellation Leo Minor. It is faintly visible to the naked eye as a white-hued point of light with an apparent magnitude of 5.58.[2] Gaia DR3 parallax measurements imply a distance of 510 light-years,[1] and it is currently receding with a poorly constrained heliocentric radial velocity of 7 km/s.[5] At its current distance, 34 LMi's brightness is diminished by interstellar extinction of 0.16 magnitudes and it has an absolute magnitude of −1.02.[6]
Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
---|---|
Constellation | Leo Minor |
Right ascension | 10h 33m 30.91104s[1] |
Declination | +34° 59′ 19.3006″[1] |
Apparent magnitude (V) | 5.58±0.01[2] |
Characteristics | |
Evolutionary stage | subgiant[3] |
Spectral type | A2 V[4] |
U−B color index | +0.04[4] |
B−V color index | +0.02[4] |
Astrometry | |
Radial velocity (Rv) | 7±10[5] km/s |
Proper motion (μ) | RA: −28.397 mas/yr[1] Dec.: −3.072 mas/yr[1] |
Parallax (π) | 6.3892 ± 0.0706 mas[1] |
Distance | 510 ± 6 ly (157 ± 2 pc) |
Absolute magnitude (MV) | −1.02[6] |
Details | |
Mass | 2.40±0.42[7] M☉ |
Radius | 4.85±0.25[8] R☉ |
Luminosity | 323+54 −46[3] L☉ |
Surface gravity (log g) | 3.50±0.25[7] cgs |
Temperature | 9,333+152 −149[3] K |
Metallicity [Fe/H] | −0.03[9] dex |
Rotational velocity (v sin i) | 165±8[10] km/s |
Age | 406+134 −172[7] Myr |
Other designations | |
Database references | |
SIMBAD | data |
The object has received several stellar classifications over the years. Most sources generally agree that it is an early A-type main-sequence star with the classes ranging from A0 to A2.[4][14][10] Anne Cowley and colleagues found that 34 LMi has broad or nebulous absorption lines in its spectrum,[15] which could be a result of rapid rotation. However, D. R. Palmer gave a class of A0 IV,[16] indicating that it is an evolved A-type subgiant.[16] Richard O. Gray and Robert F. Garrison found a class of A1 III-IV, indicating that it has a luminosity class intermediate between a subgiant and giant star.[17]
34 LMi has 2.4 times the mass of the Sun[7] and an enlarged radius of 4.85 R☉.[8] It radiates 323 times the luminosity of the Sun from its photosphere at an effective temperature of 9,333 K.[3] At the age of 406 million years[7] 34 LMi is 1.9% past its main sequence lifetime,[3] meaning that it has evolved to the subgiant branch. The star has a near-solar metallicity at [Fe/H] = −0.03 (93% solar).[9] Like many hot stars 34 LMi spins rapidly, having a projected rotational velocity of 165 km/s.[10]
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