Gliese 393

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Gliese 393
Observation data
Epoch J2000      Equinox J2000
Constellation Sextans
Right ascension 10h 28m 55.551s[1]
Declination +00° 50′ 27.60″[1]
Apparent magnitude (V) 9.65[2]
Characteristics
Spectral type M2V[3]
U−B color index 1.192[2]
B−V color index 1.507±0.014[2]
Distance
22.953 ± 0.003 ly
(7.038 ± 0.001 pc)
Absolute magnitude (MV)10.40[2]
Details
Gyr
LTT 12805, 2MASS J10285555+0050275[6]
Database references
SIMBADdata

Gliese 393, or GJ 393, is a single

″ per year.[9] The net velocity of this star relative to the Sun is 32.9 km/s.[2] It shares a similar space motion as members of the AB Doradus moving group, but is considered a random interloper.[5]

The

Sun's luminosity from its photosphere at an effective temperature of 3,579 K.[3]

Planetary system

In 2019, one candidate planet was detected by the

semimajor axis of 8.2 Gm. Longer period signals found in the data were interpreted as stellar activity.[10]

In 2021, the planet was confirmed as real after being detected independently in three different datasets.[11]

The Gliese 393 planetary system[10][11]
Companion
(in order from star) 		Mass Semimajor axis
(AU) 		Orbital period
(days) 		Eccentricity Inclination Radius
b 1.71±0.24 M🜨 0.05402±0.00072 7.0268±0.00082 0 — —

References

  1. ^
    S2CID 244398875
    . Gaia DR3 record for this source at VizieR.
  2. ^
    S2CID 119257644
  3. ^
    S2CID 102351979
    . A68.
  4. ^
    doi:10.3847/2041-8213/acf472
    . L50.
  5. ^
    S2CID 48362791
    , 71
  6. ^ "GJ 393". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-12-08.
  7. S2CID 86859146
    . 216.
  8. ISBN 0-933346-83-2
    .
  9. S2CID 2603568
    .
  10. ^
    arXiv:1906.04644 [astro-ph.EP
    ].
  11. ^
    S2CID 235248027
    .
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