ROXs 12

ROXs 12
Observation data
Epoch J2000      Equinox J2000
Constellation Scorpius
Right ascension 16h 26m 28.0400s[1]
Declination −25° 26′ 47.7168″[1]
Apparent magnitude (V) 14.29
Characteristics
Evolutionary stage pre-main-sequence star
Spectral type M0e[1]
Astrometry
Proper motion (μ) RA: -6.858[2] mas/yr
Dec.: -24.815[2] mas/yr
Parallax (π)7.2170 ± 0.0172 mas[2]
Distance452 ± 1 ly
(138.6 ± 0.3 pc)
Details[3]
ROXs 12
Mass0.65+0.05
−0.09 M☉
Radius1.14±0.07 R☉
Temperature3900±100 K
Rotation9.1±0.4 d
Age7.6+4.1
−2.5 Myr
2MASS J16262774–2527247
Mass0.535+0.006
−0.007 M☉
Radius1.17+0.06
−0.04 R☉
Luminosity0.24+0.05
−0.04 L☉
Surface gravity (log g)3.6+0.6
−0.7 cgs
Temperature3746+139
−122 K
Other designations
WDS J16265-2527[1]
ROXs 12: 2MASS J16262803-2526477, DENIS J162628.0-252647
2MASS J16262774–2527247: DENIS J162627.7-252724
Database references
SIMBADROXs 12
ROXs 12b
2MASS J16262774–2527247

ROXs 12 is a binary system of pre-main-sequence stars. It belongs to the Rho Ophiuchi cloud complex.[4] The surface temperature of the primary star is 3900±100 K.[3] ROXs 12 is much younger than the Sun with an age of 7.6+4.1
−2.5 million years.[4]

A multiplicity survey detected a stellar companion to ROXs 12 in 2017, named 2MASS J16262774–2527247,[5] at a projected separation of 5100 AU.[6]

  1. ^ a b c d "ROXs 12". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2021-02-18.
  2. ^ a b c Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
  3. ^ a b Bowler, Brendan P.; Kraus, Adam L.; Bryan, Marta L.; Knutson, Heather A.; Brogi, Matteo; Rizzuto, Aaron C.; Mace, Gregory N.; Vanderburg, Andrew; Liu, Michael C.; Hillenbrand, Lynne A.; Cieza, Lucas A. (2017), "The young substellar companion ROXs 12 B: near-infrared spectrum, system architecture, and spin-orbit misalignment", The Astronomical Journal, 154 (4): 165, arXiv:1708.07611, Bibcode:2017AJ....154..165B, doi:10.3847/1538-3881/aa88bd, S2CID 119187671
  4. ^ a b Cite error: The named reference Kraus2013 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Sheehan2019 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Wu2020 was invoked but never defined (see the help page).