SDSS J001820.5−093939.2
Star in the constellation Cetus / From Wikipedia, the free encyclopedia
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SDSS J001820.5–093939.2 or SDSS J0018−0939 for short is a star system approximately 1000 light-years away near the constellation Cetus.
Quick Facts Constellation, Right ascension ...
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Cetus |
Right ascension | 00h 18m 20.515s[1] |
Declination | −09° 39′ 39.07″[1] |
Apparent magnitude (V) | 15.8 |
Characteristics | |
Evolutionary stage | main sequence star |
Spectral type | F9 |
Variable type | None |
Astrometry | |
Distance | 1,000 ly (300 pc) |
Absolute magnitude (MV) | 8.0 |
Details | |
Mass | 0.47 M☉ |
Radius | 0.36 R☉ |
Temperature | 4600 K |
Metallicity [Fe/H] | –2.5 dex |
Age | ~13+ Gyr |
Other designations | |
SDSS J001820.5-093939.2, SDSS J0018-0939, J0018-0939 | |
Database references | |
SIMBAD | data |
Close
SDSS J0018−0939 is a cool main-sequence star. It is the first star found proposed to be a massive second generation star.[2]