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Gliese 436
Star in the constellation Leo / From Wikipedia, the free encyclopedia
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Gliese 436 is a red dwarf located 31.9 light-years (9.8 parsecs) away in the zodiac constellation of Leo. It has an apparent visual magnitude of 10.67,[3] which is much too faint to be seen with the naked eye. However, it can be viewed with even a modest telescope of 2.4 in (6 cm) aperture.[12] In 2004, the existence of an extrasolar planet, Gliese 436 b, was verified as orbiting the star. This planet was later discovered to transit its host star.
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Quick Facts Observation data Epoch J2000 Equinox J2000, Constellation ...
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Leo[1] |
Right ascension | 11h 42m 11.09334s[2] |
Declination | +26° 42′ 23.6508″[2] |
Apparent magnitude (V) | 10.67[3] |
Characteristics | |
Spectral type | M2.5 V[3] |
Apparent magnitude (B) | ~12.20[4] |
Apparent magnitude (V) | ~10.68[4] |
Apparent magnitude (J) | 6.900 ± 0.024[5] |
Apparent magnitude (H) | 6.319 ± 0.023[5] |
Apparent magnitude (K) | 6.073 ± 0.016[5] |
U−B color index | +1.23[6] |
B−V color index | +1.52[3] |
Astrometry | |
Radial velocity (Rv) | +8.87±0.16[2] km/s |
Proper motion (μ) | RA: 895.088(26) mas/yr[2] Dec.: −813.550(25) mas/yr[2] |
Parallax (π) | 102.3014 ± 0.0302 mas[2] |
Distance | 31.882 ± 0.009 ly (9.775 ± 0.003 pc) |
Absolute magnitude (MV) | 10.63[3] |
Details[7] | |
Mass | 0.425±0.009 M☉ |
Radius | 0.432±0.011 R☉ |
Luminosity | 0.02463±0.00029 L☉ |
Surface gravity (log g) | 4.833±0.013[8] cgs |
Temperature | 3,477+46 −44 K |
Metallicity [Fe/H] | -0.46+0.31 −0.24[8] dex |
Rotation | 39.9±0.8 d[9] |
Rotational velocity (v sin i) | 1.0[10] km/s |
Age | 7.41–11.05[11] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
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