Star in the constellation Sculptor
LTT 9779 / Uúba
Observation data Epoch J2000 Equinox J2000
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Constellation
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Sculptor[1]
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Right ascension
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23h 54m 40.20731s[2]
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Declination
|
−37° 37′ 40.5244″[2]
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Apparent magnitude (V)
|
9.76±0.03[3]
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Characteristics
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Evolutionary stage
|
Main sequence
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Spectral type
|
G7V[3]
|
Apparent magnitude (B)
|
10.55±0.04[3]
|
Apparent magnitude (V)
|
9.76±0.03[3]
|
Apparent magnitude (G)
|
9.606±0.003[2]
|
Apparent magnitude (J)
|
8.45±0.02[3]
|
Apparent magnitude (H)
|
8.15±0.02[3]
|
Apparent magnitude (K)
|
8.02±0.03[3]
|
Astrometry |
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|
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Radial velocity (Rv) | −10.72±0.22[2] km/s |
Proper motion (μ) | RA: 247.634 mas/yr[2] Dec.: −69.752 mas/yr[2] |
Parallax (π) | 12.3381 ± 0.0166 mas[2] |
Distance | 264.3 ± 0.4 ly (81.0 ± 0.1 pc) |
Absolute magnitude (MV) | 5.30±0.07[3] |
|
Details[3] |
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|
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Mass | 1.00+0.02 −0.03 M☉ |
Radius | 0.949±0.006 R☉ |
Luminosity (bolometric) | 0.71±0.01 L☉ |
Surface gravity (log g) | 4.51±0.01 cgs |
Temperature | 5443+14 −13 K |
Metallicity [Fe/H] | 0.27±0.03 dex |
Rotation | ≤45 d |
Rotational velocity (v sin i) | 1.06±0.37 km/s |
Age | 1.9+1.7 −1.2 Gyr |
|
Other designations |
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Uúba, CD−38 15670, CPD−38 8578, HIP 117883, SAO 214854, PPM 304331, LTT 9779, NLTT 58368, TOI-193, TIC 183985250, TYC 8015-1162-1, 2MASS J23544020-3737408, WISEA J235440.43-373741.2[4] |
Database references |
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SIMBAD | data |
LTT 9779 (or Uúba) is a G-type main-sequence star located 264 light-years (81 parsecs) away from the Solar System in the constellation of Sculptor. The star is about 95% the radius and about the same mass as the Sun, but younger than the Sun at 1.7 billion years old, hence its lower luminosity (about 0.7 L☉). It has a temperature of 5,443 K (5,170 °C; 9,338 °F) and a rotation period of 45 days.[3] LTT 9779 is orbited by one known exoplanet.