Gliese 570

The ternary star system Gliese 570. The T-type methane brown dwarf Gliese 570D is indicated with an arrow.
Credit: 2MASS
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Libra
Right ascension 14
Declination -21° 24′ 55.7131″
Apparent magnitude (V) 5.64 / ? / 9.90
Characteristics
Spectral type K4V / M1V / M3V / T7V
U−B color index 1.06 /1.22
B−V color index 1.11 / 1.51
Variable type None
Astrometry
Radial velocity (Rv) +27.9 km/s
Proper motion (μ) RA: 1037.06 mas/yr
Parallax (π) 171.22 ± 0.94mas
Distance 19.0 ± 0.1 ly
(5.84 ± 0.03 pc)
Absolute magnitude (MV) 6.79 / ? / 11.05
Details
Mass 0.802 ± 0.040 / 0.55 / 0.35 / 0.05 M
Radius 0.739 ± 0.019 / 0.65 R
Luminosity 0.16 / 0.02 / 0.003 / 3•10-6L
Temperature 4597 ± 101 / 2700 K
Metallicity \begin{smallmatrix}\left[\frac{Fe}{H}\right]\ =\ 0.06\end{smallmatrix}
Rotation 48.3 days
Rotational velocity (v sin i) 1.50 km/s
Other designations
33 G. Librae, GJ 570, HR 5568, HD 131977 / 131976/ ?, BD -20°4125, LHS 387, LTT 5949, GCTP 3375.00, SAO 183040, FK5 1391, LFT 1161, LPM 551, Vys 726, ADS 9446, HIP 73184 / 73182 / ?
Database references
SIMBAD data

Get more info about 33 G. Lib in Wikipedia

This article uses material from the Wikipedia article
33 G. Lib, which is released under the Creative Commons Attribution-Share-Alike License 3.0