11 Leonis Minoris

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11 Leonis Minoris A/B
Observation data
Epoch J2000      Equinox J2000
Constellation Leo Minor
Right ascension 09h 35m 39.50s
Declination +35° 48′ 36.48″
Apparent magnitude (V) 5.41/13.0
Characteristics
Spectral type G8V + M5V
U−B color index 0.44/—
B−V color index 0.77/—
Variable type RS CVn
Astrometry
Radial velocity (Rv) +13.4 km/s
Proper motion (μ) RA: -730.03 mas/yr
Dec.: -260.6 mas/yr
Parallax (π) 89.45 ± 0.78 mas
Distance 36.5 ± 0.3 ly
(11.18 ± 0.10 pc)
Absolute magnitude (MV) 5.16/12.8
Orbit
Companion Gl 34B
Period (P) 201 yr
Semi-major axis (a) 3.84"
Eccentricity (e) 0.88
Inclination (i) 117°
Details
11 LMi A
Mass 0.964[1] M
Radius 1.0029 ± 0.0158[1] R
Luminosity 0.7550 ± 0.0055[1] L
Temperature 5376 ± 43[1] K
Metallicity [Fe/H] +0.33[2] dex
Rotation 18.0 days[2]
Age 7.9[1] Gyr
Other designations
11 Leonis Minoris, GJ 356, HD 82885, HIP 47080, HR 3815, SAO 61586

11 Leonis Minoris (11 LMi) is a star system 37 light years away from Earth, in the constellation Leo Minor. The primary star is a yellow dwarf (main sequence) star of spectral type G8V, which is slightly more massive but slightly dimmer than our sun. The primary is an RS Canum Venaticorum type variable star and its brightness varies by 0.04 magnitudes.

There is also a secondary star, a red dwarf star much dimmer than the primary. It orbits in a highly eccentric orbit ranging from roughly 4 AU to 63 AU from the primary.

References[edit]

  1. ^ a b c d e Boyajian, Tabetha S. et al. (July 2013), Stellar Diameters and Temperatures. III. Main-sequence A, F, G, and K Stars: Additional High-precision Measurements and Empirical Relations, The Astrophysical Journal 771 (1): 40, arXiv:1306.2974, Bibcode:2013ApJ...771...40B, doi:10.1088/0004-637X/771/1/40. 
  2. ^ a b Maldonado, J. et al. (October 2010), A spectroscopy study of nearby late-type stars, possible members of stellar kinematic groups, Astronomy and Astrophysics 521: A12, arXiv:1007.1132, Bibcode:2010A&A...521A..12M, doi:10.1051/0004-6361/201014948 

External links[edit]