HD 93385

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HD 93385
Observation data
Epoch J2000      Equinox J2000
Constellation Vela
Right ascension 10h 46m 15.116s[1]
Declination –41° 27′ 51.73″[1]
Apparent magnitude (V) 7.486[2]
Characteristics
Spectral type G2/G3 V[3]
B−V color index 0.595[4]
Distance
140.9 ± 0.1 ly
(43.20 ± 0.03 pc)
Details
Gyr
HIP 52676, SAO 222310[7]
Database references
SIMBADdata

HD 93385 is a

light years from the Sun. It is drifting further away with a radial velocity
of +47.8 km/s.

This is an ordinary

Maunder minimum analog.[4]

A physical companion star with an apparent visual magnitude of 12.29 is located at an

arcseconds (equivalent to projected separation of 448 AU) along a position angle of 288°. It is estimated to have 45% of the mass of the Sun.[8] A 2015 survey ruled out the existence of any additional stellar companions at projected distances from 12 to 352 astronomical units.[9]

Planetary system

This star hosts two close-orbiting, super-Earth-like planets, suspected since 2011 and confirmed in 2021.[10][11] The first has 8.3 times the mass of the Earth and an orbital period of 13.186 days. The second is 10.1 times the Earth's mass with a period of 46.025 days.[12] A third planet on an innermost orbit was discovered in 2017[13] and confirmed in 2021.[11]

The HD 93385 A planetary system[11]
Companion
(in order from star) 		Mass Semimajor axis
(AU) 		Orbital period
(days) 		Eccentricity Inclination Radius
b ≥4.2±0.5 M🜨 0.0756±0.0013 7.3426±0.0012 <0.295 — —
c ≥7.1±0.6 M🜨 0.112±0.002 13.180±0.003 <0.20 — —
d ≥8.7±0.9 M🜨 0.2565±0.0043 45.85±0.05 0.09+0.15
−0.05 		— —

References

  1. ^
    doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR
    .
  2. ^
    doi:10.1888/0333750888/2862
    .
  3. ^
    Bibcode:1978mcts.book.....H
    .
  4. ^
    doi:10.1088/2041-8205/747/2/L32
    .
  5. doi:10.1086/430500
    .
  6. ^
    S2CID 118565025
    .
  7. ^ "HD 93385". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2013-10-07.{{cite web}}: CS1 maint: postscript (link)
  8. S2CID 43663915
    .
  9. hdl:1887/49340
    , retrieved 19 June 2020.
  10. S2CID 118410500
    .
  11. ^
    doi:10.1051/0004-6361/202141351
    , A104
  12. ^ Zolotukhin, Ivan, "Catalog", Extrasolar Planets Encyclopaedia, retrieved 2013-10-07.
  13. doi:10.1051/0004-6361/201629270
    , A117
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