38 Leonis Minoris
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Leo Minor |
| Right ascension | 10h 39m 07.63244s |
| Declination | +37° 54′ 36.0035″ |
| Apparent magnitude (V) | 5.84 |
| Characteristics | |
| Spectral type | G0 IV |
| B−V color index | 0.595±0.003 |
| Astrometry | |
| Radial velocity (Rv) | +30.9±0.3 km/s |
| Proper motion (μ) | RA: −220.50 mas/yr Dec.: −45.31 mas/yr |
| Parallax (π) | 19.11±0.37 mas |
| Distance | 171 ± 3 ly (52 ± 1 pc) |
| Absolute magnitude (MV) | 2.26 |
| Orbit | |
| Period (P) | 7.7991499±0.0000037 d |
| Eccentricity (e) | 0.023±0.034 |
| Periastron epoch (T) | 20,165.164±1.470 HJD |
| Argument of periastron (ω) (secondary) | 285.56±68.51° |
| Semi-amplitude (K1) (primary) | 24.10±0.73 km/s |
| Details | |
| 38 LMi A | |
| Mass | 1.68 M☉ |
| Luminosity | 11.32 L☉ |
| Surface gravity (log g) | 3.73 cgs |
| Temperature | 6,106 K |
| Metallicity [Fe/H] | +0.32 dex |
| Rotational velocity (v sin i) | 14.5±1.0 km/s |
| Age | 2.03±0.14 Gyr |
| 38 LMi B | |
| Mass | ≥ 0.31 M☉ |
| Other designations | |
| 38 LMi, BD+38° 2166, FK5 2852, HD 92168, HIP 52139, HR 4168, SAO 62178 | |
| Database references | |
| SIMBAD | data |
38 Leonis Minoris is a binary star system in the northern constellation of Leo Minor. It shines with a combined light of apparent magnitude 5.84, which indicates it a dimly visible to the naked eye under good viewing conditions. An annual parallax shift of 19.11 mas provides a distance estimate of around 171 light years. It has a relatively high proper motion, traversing the celestial sphere at a rate of 0.226 arcseconds per year, and is moving away from the Sun with a radial velocity of +31 km/s.
This is a single-lined spectroscopic binary with an orbital period of 7.8 days and a low eccentricity of 0.023 – nearly circular. The visible component has a stellar classification of G0 IV, matching a G-type subgiant star that is exhausting the hydrogen at its core and evolving into a giant. It is about two billion years old with 1.68 times the mass of the Sun and is spinning with a projected rotational velocity of 14.5 km/s. The star has a higher than solar abundance of iron in its spectrum. It is radiating 11 times the Sun's luminosity from its photosphere at an effective temperature of 6,106 K.