Gliese 436

Gliese 436 / Noquisi
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]
Distance31.882 ± 0.009 ly
(9.775 ± 0.003 pc)
Absolute magnitude (MV)10.63[3]
Details[7]
Mass0.425±0.009 M☉
Radius0.432±0.011 R☉
Luminosity0.02463±0.00029 L☉
Surface gravity (log g)4.833±0.013[8] cgs
Temperature3,477+46
−44 K
Metallicity [Fe/H]-0.46+0.31
−0.24[8] dex
Rotation39.9±0.8 d[9]
Rotational velocity (v sin i)1.0[10] km/s
Age7.41–11.05[11] Gyr
Other designations
Noquisi, GJ 436, HIP 57087, LHS 310, LTT 13213, Ross 905, 2MASS J11421096+2642251[6]
Database references
SIMBADdata

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.

Gliese 436
  1. ^ Cite error: The named reference Roman1987 was invoked but never defined (see the help page).
  2. ^ a b c d e Cite error: The named reference GaiaDR3 was invoked but never defined (see the help page).
  3. ^ a b c d e Cite error: The named reference Butler2004 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference aj128_1_463 was invoked but never defined (see the help page).
  5. ^ a b c Cite error: The named reference 2MASS was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference Simbad was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Pineda2021 was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference Wang2021 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference mnras452_3_2745 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference apj704_2_975 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference saffe was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference sherrod_koed2003 was invoked but never defined (see the help page).