SR 12 (star)

SR 12

SR 12 and SR 12c (lower left) with JWST MIRI
Observation data
Epoch J2000      Equinox J2000
Constellation Ophiuchus
Right ascension 16h 27m 19.51s
Declination −24° 41′ 40.41″
Apparent magnitude (V) 13.09 to 13.53[1]
Characteristics
Evolutionary stage T-Tauri binary
Spectral type M3+M8[2]
Variable type rotational variable[3]
Astrometry
Radial velocity (Rv)-5.648320 ±0.01018[4] km/s
Proper motion (μ) RA: -7.703 ±1.088 mas/yr[5]
Dec.: -25.327 ±0.829 mas/yr[5]
Parallax (π)8.9034 ± 0.4288 mas[5]
Distance370 ± 20 ly
(112 ± 5 pc)
Details
SR 12A
Mass0.36+0.16
−0.07[3] M☉
Radius2.0 ±0.3[3] R☉
Temperature3428[6] K
Rotation3.4 to 3.6 days[1]
Age2[2] Myr
SR 12B
Temperature2500[6] K
Position (relative to SR 12A)[7]
ComponentSR 12B
Epoch of observation2022.2827
Angular distance0.1118 ±1.1″
Position angle76.2 ±1.1°
Other designations
EM* SR 12, 2MASS J16271951-2441403, ISO-Oph 130, ROX 21, TIC 175629526, V* V2247 Oph, WDS J16273-2442AB
Database references
SIMBADdata
Exoplanet Archivedata

SR 12 (also known as V2247 Oph) is a weak-line T-Tauri binary that has a planetary-mass companion with a detected accretion disk.[2]

  1. ^ a b Cite error: The named reference Grankin2008 was invoked but never defined (see the help page).
  2. ^ a b c Cite error: The named reference Wu2022 was invoked but never defined (see the help page).
  3. ^ a b c Cite error: The named reference Donati2010 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference Jönsson2020 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Gaia DR2 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference Gras-Velázquez2005 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Mason2022 was invoked but never defined (see the help page).