| |
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Leo Minor |
| Right ascension | 09h57m 41.0544s[1] |
| Declination | +41° 03′ 20.275″[1] |
| Apparent magnitude (V) | 5.10±0.01[2] |
| Characteristics | |
| Spectral type | F6 V[3] |
| U−B color index | 0.00[4] |
| B−V color index | +0.46[4] |
| Astrometry | |
| Radial velocity (Rv) | −8.6±2.6[5] km/s |
| Proper motion (μ) | RA: −116.432 mas/yr[1] Dec.: −25.860 mas/yr[1] |
| Parallax (π) | 34.5809 ± 0.0926 mas[1] |
| Distance | 94.3 ± 0.3 ly (28.92 ± 0.08 pc) |
| Absolute magnitude (MV) | +2.86[6] |
| Orbit[7] | |
| Period (P) | 9.2835 d |
| Eccentricity (e) | 0.048[8] |
| Periastron epoch (T) | 2,443,858.21 JD |
| Argument of periastron (ω) (primary) | 351[8]° |
| Semi-amplitude (K1) (primary) | 18.9 km/s |
| Semi-amplitude (K2) (secondary) | 25.3 km/s |
| Details | |
| A | |
| Mass | 1.29±0.19[9] M☉ |
| Radius | 2±0.1[9] R☉ |
| Luminosity | 6.41±0.04[1] L☉ |
| Surface gravity (log g) | 3.98±0.03[10] cgs |
| Temperature | 6,483±80[11] K |
| Metallicity [Fe/H] | +0.09[11] dex |
| Rotational velocity (v sin i) | 5[12] km/s |
| Age | 2.474[1] Gyr |
| B | |
| Mass | 1.01[13] M☉ |
| Other designations | |
19 LMi, AG+41°966, BD+41°2033, FK5 374, GC 13700, GJ 3574, HD 86146, HIP 48833, HR 3928, SAO 43115[14] | |
| Database references | |
| SIMBAD | data |
19 Leonis Minoris (19 LMi) is a spectroscopic binary[15] located in the northern constellation Leo Minor. It has an apparent magnitude of 5.1,[2] making it one of the brighter members of the constellation. The system is relatively close at a distance of 94 light years[1] but is drifitng closer with a heliocentric radial velocityof8.6 km/s.[5]
This spectroscopic binary can be classified as single lined[3] because only the primary's spectrum can be observed clearly, with it having a stellar classification of F6 V.[3] This makes it an ordinary F-type main-sequence star. The companion is probably a G-type main-sequence star of G0,[7] having a mass 101% that of the Sun.[13] The pair have a relatively circular orbit of about 9 days.[13]
19 LMi has 129% the mass of the Sun[9] and an effective temperatureof6,483 K, giving a yellow white hue. The object is somewhat evolved at an age of 2.5 billion years,[1] having a slightly enlarged radius of 2 R☉[9] and a luminosity of 6.4 L☉,[1] high for its class. 19 LMi has an iron abundance 123% that of the Sun,[11] making it slightly metal enriched. It spins modestly with a projected rotational velocityof5 km/s.[12]
