11 Leonis Minoris
| Observation data Epoch J2000 Equinox J2000 |
|
|---|---|
| Constellation | Leo Minor |
| Right ascension | 09h 35m 39.50337s[1] |
| Declination | +35° 48′ 36.4874″[1] |
| Apparent magnitude (V) | 4.80/12.50[2] |
| Characteristics | |
| Spectral type | G8V[2] + M5V[citation needed] |
| U−B color index | 0.44/— |
| B−V color index | 0.77/— |
| Variable type | RS CVn |
| Astrometry | |
| Radial velocity (Rv) | +14.40[3] km/s |
| Proper motion (μ) | RA: -728.71[1] mas/yr Dec.: -259.81[1] mas/yr |
| Parallax (π) | 87.96 ± 0.32[1] mas |
| Distance | 37.1 ± 0.1 ly (11.37 ± 0.04 pc) |
| Orbit[2] | |
| 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[4] M☉ |
| Radius | 1.0029 ± 0.0158[4] R☉ |
| Luminosity | 0.7550 ± 0.0055[4] L☉ |
| Temperature | 5376 ± 43[4] K |
| Metallicity [Fe/H] | +0.33[5] dex |
| Rotation | 18.0 days[5] |
| Age | 7.9[4] Gyr |
| 11 LMi B | |
| Mass | 0.23[6] M☉ |
| Other designations | |
11 Leonis Minoris (11 LMi) is a star system located 37 light years away from Earth, in the northern constellation of Leo Minor. The primary component is a G-type main sequence star of spectral type G8V, which is slightly more massive but slightly dimmer than Sol. This is an RS Canum Venaticorum variable star with its luminosity varying by 0.033 magnitudes over a period of 18 days.[8] Compared to the Sun, it has more than double the abundance of elements more massive than helium—what astronomers term the star's metallicity.[5]
There is a secondary component, a red dwarf star much dimmer than the primary. It has a highly eccentric orbit ranging from roughly 4 AU to 63 AU from the primary.[citation needed]
Popular culture
John J. Lumpkin used the star system in his novel Through Struggle, the Stars.
References
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- ↑ 2.0 2.1 2.2 Lua error in package.lua at line 80: module 'strict' not found.
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- ↑ 4.0 4.1 4.2 4.3 4.4 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 5.0 5.1 5.2 Lua error in package.lua at line 80: module 'strict' not found.
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External links
- Lua error in package.lua at line 80: module 'strict' not found.
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