TOI-216.02
TOI-216.02 is a cold gas giant orbiting TOI-216 in the constellation Dorado. It lies about 580 light-years from Earth and was discovered in 2019 using the transit method.
How Big Is TOI-216.02?
TOI-216.02 has a radius of 8.00 times that of Earth, or 0.71 times the radius of Jupiter. Its mass is 18.8 times that of Earth.
Is TOI-216.02 in the Habitable Zone?
The position of TOI-216.02 relative to the habitable zone of TOI-216 cannot be precisely determined from the available orbital data.
Orbit and Year Length
A year on TOI-216.02 — one full orbit around TOI-216 — lasts 17.2 Earth days, shorter than Mercury's 88-day year. Its orbit is mildly elliptical (eccentricity 0.16).
How Was TOI-216.02 Discovered?
TOI-216.02 was discovered in 2019 using the transit method, with observations from Transiting Exoplanet Survey Satellite (TESS).
The transit method watches a star for the tiny, regular dip in brightness that occurs when a planet crosses in front of it. The depth and timing of these dips reveal the planet's size and orbital period.
How Far Away Is TOI-216.02?
TOI-216.02 is 580.4 light-years (177.9 parsecs) from Earth. Light arriving here tonight left the planet around the year 1446. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 10,215,040 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. TOI-216.02 scores 0.15, ranking #4,199 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: TOI-216
TOI-216
- Mass
- 0.77 M☉
- Radius
- 0.75 R☉
The TOI-216 Planetary System
TOI-216.02 is one of 2 known planets in the TOI-216 system. Its siblings:
- TOI-216.01 (Cold Gas Giant)
TOI-216.02 — Complete Data
| Radius | 8.000 Earth radii (0.714 Jupiter radii) |
|---|---|
| Mass | 18.75 Earth masses (0.059 Jupiter masses) |
| Orbital period | 17.16 days |
| Eccentricity | 0.160 |
| Earth Similarity Index | 0.15 |
| Distance from Earth | 580.4 light-years (177.9 parsecs) |
| Constellation | Dorado |
| Discovery method | Transit |
| Discovery facility | Transiting Exoplanet Survey Satellite (TESS) |
| Discovery year | 2019 |
Data: NASA Exoplanet Archive, last updated 2022-04-12. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About TOI-216.02
Is TOI-216.02 habitable?
TOI-216.02 is not known to orbit within the habitable zone of TOI-216, and as a cold gas giant it is an unlikely candidate for life as we know it.
How far away is TOI-216.02?
TOI-216.02 is about 580 light-years from Earth in the constellation Dorado. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 10,215,040 years to get there.
How big is TOI-216.02 compared to Earth?
TOI-216.02 has 8.00 times the radius of Earth and about 18.8 times its mass.
How long is a year on TOI-216.02?
One orbit around TOI-216 takes 17.2 Earth days — short enough that 21 of its years would fit into one Earth year.
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