Epoch J2000 Equinox J2000
|Right ascension||10h 46m 15.11587s|
|Declination||–41° 27′ 51.7235″|
|Apparent magnitude (V)||7.486|
|Spectral type||G2/G3 V|
|B−V color index||0.595|
|Radial velocity (Rv)||+47.80 ± 0.61 km/s|
|Proper motion (μ)||RA: –48.11 mas/yr
Dec.: –53.86 mas/yr
|Parallax (π)||23.70 ± 0.69 mas|
|Distance||138 ± 4 ly
(42 ± 1 pc)
|Surface gravity (log g)||4.08 ± 0.11 cgs|
|Temperature||5,823 ± 35 K|
|Metallicity [Fe/H]||–0.05 ± 0.03 dex|
HD 93385 is a star in the southern constellation of Vela. At an apparent visual magnitude of 7.5, it is too faint to be seen with the unaided eye. Parallax measurements made using the Hipparcos satellite show an annual shift of 23.70 milli-arcseconds. This is equivalent to a physical separation of around 138 light years from the Sun.
This is an ordinary main sequence star with a stellar classification of G2/G3 V. The physical properties of HD 93385 are similar to those of the Sun; it is slightly larger with 107% of the Sun's mass, 117% of the radius, and 142% of the luminosity. The abundance of elements, other than hydrogen and helium, is nearly the same as in the Sun. It is currently at an unusual low level of surface activity and thus is a candidate Maunder minimum analog.
This star hosts two close-orbiting, super-Earth-like planets. 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. A physical companion star with an apparent visual magnitude of 12.29 is located at an angular separation of 10.32 arcseconds along a position angle of 288°. It is estimated to have 45% of the mass of the Sun.
- van Leeuwen, F. (November 2007), Validation of the new Hipparcos reduction, Astronomy and Astrophysics 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357.
- Høg, E. et al. (March 2000), The Tycho-2 catalogue of the 2.5 million brightest stars, Astronomy and Astrophysics 355: L27–L30, Bibcode:2000A&A...355L..27H, doi:10.1888/0333750888/2862.
- Houk, Nancy (1979), Michigan catalogue of two-dimensional spectral types for the HD stars 1, Ann Arbor, Michigan: Department of Astronomy, University of Michigan, Bibcode:1978mcts.book.....H.
- Lubin, Dan et al. (March 2012), Frequency of Maunder Minimum Events in Solar-type Stars Inferred from Activity and Metallicity Observations, The Astrophysical Journal Letters 747 (2): L32, Bibcode:2012ApJ...747L..32L, doi:10.1088/2041-8205/747/2/L32.
- Valenti, Jeff A.; Fischer, Debra A. (July 2005), Spectroscopic Properties of Cool Stars (SPOCS). I. 1040 F, G, and K Dwarfs from Keck, Lick, and AAT Planet Search Programs, The Astrophysical Journal Supplement Series 159 (1): 141–166, Bibcode:2005ApJS..159..141V, doi:10.1086/430500.
- Ghezzi, L. et al. (September 2010), Stellar Parameters and Metallicities of Stars Hosting Jovian and Neptunian Mass Planets: A Possible Dependence of Planetary Mass on Metallicity, The Astrophysical Journal 720 (2): 1290–1302, arXiv:1007.2681, Bibcode:2010ApJ...720.1290G, doi:10.1088/0004-637X/720/2/1290.
- HD 93385 -- Star, Strasbourg astronomical Data Center (Centre de Données astronomiques de Strasbourg), retrieved 2013-10-07.
- González Hernández, J. I. et al. (April 2013), Searching for the signatures of terrestrial planets in F-, G-type main-sequence stars, Astronomy & Astrophysics 552: A6, arXiv:1301.2109, Bibcode:2013A&A...552A...6G, doi:10.1051/0004-6361/201220165.
- Zolotukhin, Ivan, Catalog, The Extrasolar Planet Encyclopedia, retrieved 2013-10-07.
- Tokovinin, Andrei (February 2011), Low-mass Visual Companions to Nearby G-dwarfs, The Astronomical Journal 141 (2): 52, arXiv:1011.2051, Bibcode:2011AJ....141...52T, doi:10.1088/0004-6256/141/2/52.