11 Leonis Minoris
| 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 (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
- ↑ 1.0 1.1 1.2 1.3 1.4 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.
- ↑ 2.0 2.1 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
- "Binary Catalog". Retrieved April 4, 2007.
- "SIMBAD query". Retrieved April 4, 2007.
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