T Chamaeleontis

T Chamaeleontis

A visual band light curve for T Chamaeleontis, plotted from AAVSO data[1]
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Chamaeleon
Right ascension 11h 57m 13.52451s[2]
Declination −79° 21′ 31.5305″[2]
Apparent magnitude (V) 10.05 - 14.50[3]
Characteristics
Evolutionary stage T Tauri star[4]
Spectral type K0e[5]
U−B color index +0.63[6]
B−V color index +1.14[6]
J−K color index +1.67[7]
Variable type Orion variable[8]
Astrometry
Radial velocity (Rv)13.8±0.1[9] km/s
Proper motion (μ) RA: −41.586 mas/yr[2]
Dec.: −8.655 mas/yr[2]
Parallax (π)9.7356 ± 0.0332 mas[2]
Distance335 ± 1 ly
(102.7 ± 0.4 pc)
Absolute magnitude (MV)+6.55[10]
Details
Mass0.65[11] M☉
Radius0.65±0.09[12] R☉
Luminosity0.29[13] L☉
Surface gravity (log g)4.50[13] cgs
Temperature5,111[14] K
Metallicity [Fe/H]+0.09±0.15[15] dex
Rotational velocity (v sin i)39±3[16] km/s
Age12.7[17] Myr
Other designations
T Cha, HIP 58285, TYC 9419-1187-1, GSC 09419-01187, 2MASS J11571348-7921313
Database references
SIMBADdata

T Chamaeleontis (T Cha), also known as HIP 58285, is a T Tauri star located in the southern circumpolar constellation Chamaeleon. It has an apparent magnitude that ranges from 10.05 to 14.50,[3] which is below the limit for naked eye visibility. Gaia DR3 parallax measurements place the object 335 light years away[2] and it is currently receding with a heliocentric radial velocity of 13.8 km/s.[9] At its current distance, T Cha's average brightness is diminished by 0.31 magnitudes due to extinction from interstellar dust. It has an average absolute magnitude of +6.55.[10]

  1. ^ Cite error: The named reference aavso was invoked but never defined (see the help page).
  2. ^ a b c d e Cite error: The named reference GaiaDR3 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference ASSVO was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference Mauder1975 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Torres2006 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference Bastian1979 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Glass1974 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Samus2017 was invoked but never defined (see the help page).
  9. ^ a b Cite error: The named reference Zúñiga-Fernández2020 was invoked but never defined (see the help page).
  10. ^ a b Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Baron2019 was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference Stassun2019 was invoked but never defined (see the help page).
  13. ^ a b Cite error: The named reference Sartori2003 was invoked but never defined (see the help page).
  14. ^ Cite error: The named reference da Silva2009 was invoked but never defined (see the help page).
  15. ^ Cite error: The named reference Bochanski2018 was invoked but never defined (see the help page).
  16. ^ Cite error: The named reference Covino1997 was invoked but never defined (see the help page).
  17. ^ Cite error: The named reference Murphy2013 was invoked but never defined (see the help page).