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Gliese 318

Gliese 318
Observation data
Epoch J2000      Equinox J2000
Constellation Pyxis
Right ascension 08h 41m 32.50s
Declination –32° 56′ 34.0″
Apparent magnitude (V) 11.85
Characteristics
Spectral type DA5.5
U−B color index −0.59
B−V color index +0.25
Astrometry
Radial velocity (Rv) +29.3 ± 2.9 km/s
Proper motion (μ) RA: –1100 ± 9 mas/yr
Dec.: 1340 ± 8 mas/yr
Parallax (π) 113.63 ± 1.97mas
Distance 28.7 ± 0.5 ly
(8.8 ± 0.2 pc)
Absolute magnitude (MV) 12.14 ± 0.05
Details
Mass 0.45 ± 0.01 M
Luminosity 0.0015 L
Temperature 9120 ± 190 K
Age 550 ± 20 million years
Other designations
GJ 318, CD−32° 5613, LHS 253, L 532-81, LTT 3218, WD 0839-327
Database references
SIMBAD data
ARICNS data

Gliese 318 is a white dwarf in the constellation Pyxis. Its spectral type is DA5.5 and it has a visual magnitude of 11.85, which lies 26 light years away. The star was too faint to have had its parallax measured by the Hipparcos satellite. Earth-based measurement gives its parallax as 113.63 ± 1.97 milliarcseconds, yielding a distance of 28.7 ± 0.5 light-years. It is around 45% as massive as the Sun but has only 0.15% its luminosity.



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