Beta Leonis Minoris
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| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) |
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| Constellation | Leo Minor | |
| Component | A | B |
| Right ascension | 10h 27m | 10h 27m |
| 52.998s | 53.006s | |
| Declination | +36° 42′[1] | +36° 42′[2] |
| 25.95″ | 26.01″ | |
| Apparent magnitude (V) | 4.40[3] | 6.12[3] |
| 4.215[4] | ||
| Characteristics | ||
| Spectral type | G8III-IV[3] | F8IV[3] |
| U-B color index | +0.64[3] | |
| B-V color index | +0.90[3] | |
| V-R color index | 0.5[4] | |
| R-I color index | +0.46[3] | |
| Astrometry | ||
| Proper motion: | ||
| RA (μα cos δ) | −134.15[1] mas/yr | −102.97[2] mas/yr |
| Dec. (μδ) | −113.57[1] mas/yr | −95.00[2] mas/yr |
| Parallax (π) | 22.34 ± 0.87[4] mas | |
| Distance | 146 ± 6 ly (45 ± 2 pc) |
|
| Absolute magnitude (MV) | 0.96[5] | |
| Details | ||
| Mass | ~2[6] M☉ | 1.35[6] M☉ |
| Radius | 7.8[6] R☉ | 2[6] R☉ |
| Luminosity | 36[6] L☉ | 5.8[6] L☉ |
| Temperature | 5075[6] K | 6200[6] K |
| Orbit[7] | ||
| Period (P) | 38.62 y | |
| Semimajor axis (a) | 0.363″ | |
| Eccentricity (e) | 0.668 | |
| Inclination (i) | 79.1° | |
| Longitude of node (Ω) | 41.5° | |
| Periastron epoch (T) | B1999.15 | |
| Argument of periastron (ω) (secondary) |
29.8° | |
| Database references | ||
| SIMBAD | data | |
| Other designations | ||
Coordinates: 
10h 27m 53s, +36° 42′ 26″
Beta Leonis Minoris (Beta LMi, β Leonis Minoris, β LMi) is a binary star in the constellation of Leo Minor. It has an overall apparent visual magnitude of approximately 4.215.[4] Although it is the only star in Leo Minor with a Bayer designation, it is only the second brightest star in the constellation (the brightest is 46 Leonis Minoris.)[6]
[edit] References
- ^ a b c HIP 51233, record for component 1, Hipparcos catalogue; CDS ID I/239.
- ^ a b c HIP 51233, record for component 2, Hipparcos catalogue; CDS ID I/239.
- ^ a b c d e f g h HR 4100, database entry, The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version), D. Hoffleit and W. H. Warren, Jr., CDS ID V/50. Accessed on line October 1, 2008.
- ^ a b c d e HD 90537 -- Spectroscopic binary, database entry, SIMBAD. Accessed on line October 1, 2008.
- ^ From apparent magnitude and parallax.
- ^ a b c d e f g h i Beta LMi, Stars, Jim Kaler. Accessed on line October 2, 2008.
- ^ Entry 10279+3642, Sixth Catalog of Orbits of Visual Binary Stars, United States Naval Observatory. Accessed on line October 1, 2008.
- ^ Entry 10279+3642, The Washington Double Star Catalog, United States Naval Observatory. Accessed on line October 1, 2008.
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