19 Leonis Minoris

19 Leonis Minoris
Location of 19 LMi (circled)
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]
Distance94.3 ± 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
Mass1.29±0.19[9] M☉
Radius2±0.1[9] R☉
Luminosity6.41±0.04[1] L☉
Surface gravity (log g)3.98±0.03[10] cgs
Temperature6,483±80[11] K
Metallicity [Fe/H]+0.09[11] dex
Rotational velocity (v sin i)5[12] km/s
Age2.474[1] Gyr
B
Mass1.01[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
SIMBADdata

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 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]

  1. ^ a b c d e f g h i Cite error: The named reference DR3 was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference Tycho2000 was invoked but never defined (see the help page).
  3. ^ a b c Cite error: The named reference Abt2008 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Johnson1966 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Gontcharov2006 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference Batten1980 was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference Kraicheva1980 was invoked but never defined (see the help page).
  9. ^ a b c d Cite error: The named reference Stassun2019 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Ramirez2013 was invoked but never defined (see the help page).
  11. ^ a b c Cite error: The named reference Casagrande2011 was invoked but never defined (see the help page).
  12. ^ a b Cite error: The named reference Nordstrom2004 was invoked but never defined (see the help page).
  13. ^ a b c Cite error: The named reference Tokovinin2014 was invoked but never defined (see the help page).
  14. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  15. ^ Cite error: The named reference Pourbaix2004 was invoked but never defined (see the help page).