Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
---|---|
Constellation | Leo Minor |
Right ascension | 09h 57m 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 drifting closer with a heliocentric radial velocity of 8.6 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 temperature of 6,483 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 velocity of 5 km/s . [12]