CT Chamaeleontis
File:CT Cha B MIRI.jpg 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 | Template:RA[1] |
| Declination | Template:DEC[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) | Script error: No such module "val".[5] km/s |
| Proper motion (μ) | RA: Script error: No such module "val".[1] mas/yr Dec.: Script error: No such module "val".[1] mas/yr |
| Parallax (π) | 5.2144±0.0211 mas[1] |
| Distance | Template:Rnd ± Template:Rnd ly (Template:Rnd ± Template:Rnd pc) |
| Position (relative to CT Chamaeleontis) | |
| Component | b |
| Epoch of observation | 2006–2007 |
| Angular distance | 2.670″ [4] |
| Position angle | 300.7° [4] |
| Projected separation | ~440 AU [4] |
| Details[4][6] | |
| A | |
| Mass | Script error: No such module "val". Template:Solar mass |
| Radius | Script error: No such module "val". Template:Solar radius |
| Luminosity | Script error: No such module "val". Template:Solar luminosity |
| Surface gravity (log g) | Script error: No such module "val". cgs |
| Temperature | Script error: No such module "val". K |
| Age | Script error: No such module "val".[4] Myr |
| b | |
| Mass | Script error: No such module "val".[4] MJup |
| Radius | Script error: No such module "val". RJup |
| Luminosity | 0.002 Template:Solar luminosity |
| Surface gravity (log g) | 3.5 cgs |
| Temperature | Script error: No such module "val".[7] K |
| Metallicity [Fe/H] | {{{metal_fe2}}} dex |
| Age | Script error: No such module "val".[4] Myr |
| Other designations | |
| CT Cha, 2MASS J11040909-7627193, IRAS 11027-7611, NSV 5081, WDS J11042-7627AB | |
| Database references | |
| SIMBAD | data |
| B | |
Script error: No such module "Check for unknown parameters".
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 Script error: No such module "val"./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]
Planetary system/Brown dwarf
In 2006 and 2007, a faint companion was observed 2.7 arcseconds away from CT Chamaeleontis, using the Very Large Telescope at the European Southern Observatory. Since the object shares common proper motion with CT Chamaeleontis, it is believed to be physically close to the star, with a projected separation of approximately 440 astronomical units. It is estimated to have a mass of approximately 17 Jupiter masses and is probably a brown dwarf or a planet.[4] The companion has been either designated as CT Chamaeleontis b[12] or as CT Chamaeleontis B, sometimes erroneously as low-mass star.[13] The companion was proven to be most likely in the brown dwarf mass range in 2015.[7]
Template:OrbitboxPlanet begin Template:OrbitboxPlanet disk Template:OrbitboxPlanet disk Template:OrbitboxPlanet
|}Script error: No such module "Check for unknown parameters".
References
<templatestyles src="Reflist/styles.css" />
- ↑ a b c d e Template:Cite Gaia DR2
- ↑ a b c CT Cha, database entry, The combined table of GCVS Vols I-III and NL 67-78 with improved coordinates, General Catalogue of Variable Stars Template:Webarchive, Sternberg Astronomical Institute, Moscow, Russia. Accessed on line October 1, 2008.
- ↑ Script error: No such module "Citation/CS1".
- ↑ a b c d e f g h i Script error: No such module "Citation/CS1".
- ↑ Script error: No such module "Citation/CS1".
- ↑ Script error: No such module "Citation/CS1".
- ↑ a b c Script error: No such module "Citation/CS1".
- ↑ V* CT Cha -- T Tau-type Star, database entry, SIMBAD. Accessed on line October 1, 2008.
- ↑ Script error: No such module "Citation/CS1".
- ↑ Script error: No such module "Citation/CS1".
- ↑ Script error: No such module "citation/CS1".
- ↑ Script error: No such module "citation/CS1".
- ↑ NAME CT Cha B -- Extra-solar Planet Candidate, database entry, SIMBAD. Accessed on line October 1, 2008.
<ref> tag with name "Ginski2024" defined in <references> is not used in prior text.Script error: No such module "Check for unknown parameters".