CT Chamaeleontis

CT Chamaeleontis

CT Chamaeleontis and its companion (faint object on the upper right near the star)
Credit: NASA/ESA/CSA JWST; Ya-Lin Wu et al.; processing: Meli_thev
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Chamaeleon
Right ascension 11h 04m 09.0989s[1]
Declination −76° 27′ 19.3269″[1]
Apparent magnitude (V) 12.31 to 12.43[2]
Characteristics
A
Evolutionary stage T Tauri star
Spectral type K7 Ve[3]
Variable type INB[2]
B
Spectral type M8–L0[4]
Astrometry
Radial velocity (Rv)15.13±0.09[5] km/s
Proper motion (μ) RA: −22.209±0.039[1] mas/yr
Dec.: −0.175±0.035[1] mas/yr
Parallax (π)5.2144 ± 0.0211 mas[1]
Distance625 ± 3 ly
(191.8 ± 0.8 pc)
Position (relative to CT Chamaeleontis)
ComponentB
Epoch of observation2006–2007
Angular distance2.670″ [4]
Position angle300.7° [4]
Projected separation~440 AU [4]
Details[4][6]
A
Mass0.796+0.015
−0.014 M☉
Radius2.06±0.05 R☉
Luminosity1.41+0.17
−0.16 L☉
Surface gravity (log g)4.5+0.7
−1.2 cgs
Temperature4,402+151
−166 K
Age2±2[4] Myr
B
Mass19±5[7] MJup
Radius2.20+0.81
−0.60 RJup
Luminosity0.002 L☉
Surface gravity (log g)3.5 cgs
Temperature2,500±100[7] K
Age2±2[4] Myr
Other designations
CT Cha, 2MASS J11040909-7627193, IRAS 11027-7611, NSV 5081, WDS J11042-7627AB
Database references
SIMBADdata
B

CT Chamaeleontis (CT Cha) is a T Tauri star - a primary of the star system in the constellation of Chamaeleon.[8] It has an apparent visual magnitude which varies between 12.31 and 12.43.[2] The star is still accreting material at rate 6×10−10 M☉/year.[7]

Cuno Hoffmeister discovered that CT Chamaeleontis is a variable star in 1962.[9] It was given its variable star designation in 1981.[10]

  1. ^ a b c d e Cite error: The named reference Gaia DR2 was invoked but never defined (see the help page).
  2. ^ a b c Cite error: The named reference gcvs1 was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference Torres2006 was invoked but never defined (see the help page).
  4. ^ a b c d e f g Cite error: The named reference substellar was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Nguyen2012 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Sheehan2019 was invoked but never defined (see the help page).
  7. ^ a b c Cite error: The named reference Wu2015 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference sb0 was invoked but never defined (see the help page).
  9. ^ Hoffmeister, C. (1962). "Ein System von Dunkelwolken bei ɛ Chamaeleonits. Mit 4 Textabbildungen". Zeitschrift für Astrophysik. 55: 290. Bibcode:1962ZA.....55..290H. Retrieved 8 October 2024.
  10. ^ Kholopov, P. N.; Samus, N. N.; Kukarkina, N. P.; Medvedeva, G. I.; Perova, N. B. (February 1981). "65th Name-List of Variable Stars" (PDF). Information Bulletin on Variable Stars. 1921. Bibcode:1981IBVS.1921....1K. Retrieved 8 October 2024.