35 Leonis (HIP 53019, HD 89010) is a spectroscopic binary star system[1] located in the constellation of Leo, next to the star Zeta Leonis.[2] It is made up of a yellow subgiant star and a red dwarf star,[3] which complete an orbit between each other every 537 days.[1] With an apparent magnitude of 5.97, the system can be naked-eye visible only from dark skies.[2] The distance to 35 Leonis, based from data from Gaia DR3, is 31.83 parsecs (103.8 ly).[4]
Quick Facts Observation data Epoch J2000 Equinox J2000, Constellation ...
35 Leonis
Approximate location of 35 Leonis (circled) [2] |
Observation data Epoch J2000 Equinox J2000 |
Constellation |
Leo[2][note 1] |
Right ascension |
10h 16m 32.289s[4] |
Declination |
+23° 30′ 11.206″[4] |
Apparent magnitude (V) |
5.97[2] |
Characteristics |
35 Leonis A |
Evolutionary stage |
Main-sequence star to subgiant |
Spectral type |
G1.5IV–V[5] |
Apparent magnitude (U) |
6.8[5] |
Apparent magnitude (B) |
6.6[5] |
Apparent magnitude (R) |
5.6[5] |
Apparent magnitude (G) |
5.8[5] |
Apparent magnitude (J) |
4.8[5] |
Apparent magnitude (H) |
4.5[5] |
Apparent magnitude (K) |
4.3[5] |
B |
Evolutionary stage |
Red dwarf |
Apparent magnitude (K) |
8.4[1] |
Astrometry |
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|
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Radial velocity (Rv) | -33.8[5] km/s |
Proper motion (μ) | RA: −200.342±0.259 mas/yr[4] Dec.: 32.03±0.32 mas/yr[4] |
Parallax (π) | 33.7721 ± 0.258 mas[4] |
Distance | 103.766 ly (31.8301 pc)[4] |
Absolute magnitude (MV) | 3.56[6] |
|
Orbit[1] |
---|
Primary | A |
Period (P) | 1.471 years (537 days) |
Details |
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A |
---|
Mass | 1.34[1] M☉ |
Radius | 2.12±0.18[6] R☉ |
Luminosity | 4.37[6] L☉ |
Surface gravity (log g) | 3.87[4] cgs |
Temperature | 5480±10[1] K |
Metallicity [Fe/H] | -0.3114[4] dex |
Rotational velocity (v sin i) | 2.68[6] km/s |
Age | 5.25[6][lower-alpha 1] Gyr |
B[1] |
---|
Mass | 0.15 M☉ |
Temperature | 3300+130 −140 K |
Rotational velocity (v sin i) | <10.1 km/s |
Position (relative to A)[1] |
|
Component | B |
Angular distance | 56.9±0.3 mas |
Other designations |
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BD+24 2207, Gaia DR2 725469767850488064, Gaia DR3 725469767850488064, HD 89010, HIP 50319, HR 4030, SAO 81260, PPM 100216, WDS J10167+2325B, NLTT 23866, TYC 1969-1260-1, IRAS 10137+2345, 2MASS J10163231+2330111 |
Database references |
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SIMBAD | data |
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