11 Leonis Minoris information

11 Leonis Minoris
	; A near-infrared (y band) light curve for SV Leonis Minoris, adapted from Skiff and Lockwood (1986)
Observation data; Epoch J2000 Equinox J2000
Constellation	Leo Minor
Right ascension	09h 35m 39.50181s
Declination	+35° 48′ 36.4841″
Apparent magnitude (V)	5.54 + 14.0
Characteristics
Spectral type	G8V + M4
U−B color index	0.44/—
B−V color index	0.77/—
Variable type	RS CVn
Astrometry
Radial velocity (Rv)	+14.40 km/s
Proper motion (μ)	RA: −726.201 mas/yr ; Dec.: −259.506 mas/yr
Parallax (π)	89.2581 ± 0.1928 mas
Distance	36.54 ± 0.08 ly ; (11.20 ± 0.02 pc)
Absolute magnitude (MV)	5.25±0.008
Orbit
Companion	11 LMi B
Period (P)	201 yr
Semi-major axis (a)	3.84″
Eccentricity (e)	0.88
Inclination (i)	117°
Details
11 LMi A
Mass	0.964 M☉
Radius	1.0029±0.0158 R☉
Luminosity	0.7550±0.0055 L☉
Temperature	5376±43 K
Metallicity [Fe/H]	+0.33 dex
Rotation	18.0 days
Age	7.9 Gyr
11 LMi B
Mass	0.23 M☉
Other designations
	11 LMi, SV Leonis Minoris, BD+36°1979, GJ 356, HD 82885, HIP 47080, HR 3815, SAO 61586, WDS 09357+3549
Database references
SIMBAD	11 LMi A
	11 LMi B
ARICNS	11 LMi A
	11 LMi B

11 Leonis Minoris is a binary star^[3] located 36.5 light years away from Earth,^[2] in the northern constellation of Leo Minor.^[11] It is visible to the naked eye as a dim, yellow-hued star with an apparent visual magnitude of 5.54.^[3] The system is moving away from the Earth with a heliocentric radial velocity of +14.4 km/s.^[6] It has a relatively high proper motion, traversing the celestial sphere at the rate of 0.764 arc seconds per annum.^[12]

The primary component is a G-type main-sequence star with a stellar classification of G8V,^[4] which is slightly less massive and slightly dimmer than the Sun.^[8] This is an RS Canum Venaticorum variable star with its luminosity varying by 0.033 magnitudes over a period of 18 days.^[1] Compared to the Sun, it has more than double the abundance of elements more massive than helium—what astronomers term the star's metallicity.^[9]

There is a secondary component, a 14th^[3] magnitude red dwarf star much dimmer than the primary. The pair have an orbital period of 201 years with a high eccentricity of 0.88.^[4]

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Observation data Epoch J2000 Equinox J2000
A near-infrared (y band) light curve for SV Leonis Minoris, adapted from Skiff and Lockwood (1986)^[1]
Constellation	Leo Minor
Right ascension	09^h 35^m 39.50181^s^[2]
Declination	+35° 48′ 36.4841″^[2]
Apparent magnitude (V)	5.54 + 14.0^[3]
Characteristics
Spectral type	G8V^[4] + M4^[5]
U−B color index	0.44/—
B−V color index	0.77/—
Variable type	RS CVn
Astrometry

Radial velocity (R_v)	+14.40^[6] km/s
Proper motion (μ)	RA: −726.201^[2] mas/yr Dec.: −259.506^[2] mas/yr
Parallax (π)	89.2581 ± 0.1928 mas^[2]
Distance	36.54 ± 0.08 ly (11.20 ± 0.02 pc)
Absolute magnitude (M_V)	5.25±0.008^[7]

Orbit^[4]
Companion	11 LMi B
Period (P)	201 yr
Semi-major axis (a)	3.84″
Eccentricity (e)	0.88
Inclination (i)	117°
Details
11 LMi A
Mass	0.964^[8] `M`_☉
Radius	1.0029±0.0158^[8] `R`_☉
Luminosity	0.7550±0.0055^[8] `L`_☉
Temperature	5376±43^[8] K
Metallicity [Fe/H]	+0.33^[9] dex
Rotation	18.0 days^[9]
Age	7.9^[8] Gyr
11 LMi B
Mass	0.23^[10] `M`_☉
Other designations
11 LMi, SV Leonis Minoris, BD+36°1979, GJ 356, HD 82885, HIP 47080, HR 3815, SAO 61586, WDS 09357+3549^[11]
Database references
SIMBAD	11 LMi A
	11 LMi B
ARICNS	11 LMi A
	11 LMi B

11 Leonis Minoris information

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