CT Cha b
CT Cha b is a hot Jupiter orbiting CT Cha in the constellation Chamaeleon. It lies about 622 light-years from Earth and was discovered in 2007 using the imaging method.
How Big Is CT Cha b?
CT Cha b has a radius of 24.66 times that of Earth, or 2.20 times the radius of Jupiter. Its mass is 5,403 times that of Earth.
Is CT Cha b in the Habitable Zone?
The position of CT Cha b relative to the habitable zone of CT Cha cannot be precisely determined from the available orbital data.
Temperature on CT Cha b
The equilibrium temperature of CT Cha b is about 2,600 K (2,327 °C) — hot enough to melt many metals. This estimate ignores any atmosphere, which could change surface temperatures dramatically — Earth's greenhouse effect adds about 33 °C.
Orbit and Year Length
CT Cha b orbits at an average distance of 440.000 AU.
How Was CT Cha b Discovered?
CT Cha b was discovered in 2007 using the imaging method, with observations from Paranal Observatory.
Direct imaging captures actual pictures of a planet by blocking out the overwhelming glare of its host star. It works best for young, hot, massive planets on wide orbits.
How Far Away Is CT Cha b?
CT Cha b is 622.0 light-years (190.7 parsecs) from Earth. Light arriving here tonight left the planet around the year 1404. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 10,947,200 years to make the journey.
Earth Similarity Index
The Earth Similarity Index (ESI) scores how physically similar a planet is to Earth, from 0 to 1, based on radius, density, escape velocity and surface temperature. CT Cha b scores 0.04, ranking #5,324 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: CT Cha
CT Cha
- Age
- 0.0 billion years (Sun: 4.6)
Planetary System
CT Cha b is the only planet known to orbit CT Cha so far.
CT Cha b — Complete Data
| Radius | 24.660 Earth radii (2.200 Jupiter radii) |
|---|---|
| Mass | 5,403.00 Earth masses (17.000 Jupiter masses) |
| Orbital distance | 440.000 AU |
| Equilibrium temperature | 2,600 K (2,327 °C) |
| Earth Similarity Index | 0.04 |
| Distance from Earth | 622.0 light-years (190.7 parsecs) |
| Constellation | Chamaeleon |
| Discovery method | Imaging |
| Discovery facility | Paranal Observatory |
| Discovery year | 2007 |
Data: NASA Exoplanet Archive, last updated 2014-05-14. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About CT Cha b
Is CT Cha b habitable?
CT Cha b is not known to orbit within the habitable zone of CT Cha, and as a hot Jupiter it is an unlikely candidate for life as we know it.
How far away is CT Cha b?
CT Cha b is about 622 light-years from Earth in the constellation Chamaeleon. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 10,947,200 years to get there.
How big is CT Cha b compared to Earth?
CT Cha b has 24.66 times the radius of Earth and about 5,403 times its mass.
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