TIC 279401253 b
TIC 279401253 b is a cold gas giant orbiting TIC 279401253 in the constellation Eridanus. It lies about 931 light-years from Earth and was discovered in 2023 using the transit method.
How Big Is TIC 279401253 b?
TIC 279401253 b has a radius of 11.21 times that of Earth, or 1.00 times the radius of Jupiter. Its mass is 1,951 times that of Earth.
Is TIC 279401253 b in the Habitable Zone?
TIC 279401253 b orbits inside the inner edge of the habitable zone of TIC 279401253. So close to its star, surface conditions are far too hot for liquid water.
Habitable zone of TIC 279401253: 0.830–1.948 AU (conservative: 1.052–1.847 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.
See the full interactive habitable-zone view in the Exoplanet Explorer app ›
Orbit and Year Length
A year on TIC 279401253 b — one full orbit around TIC 279401253 — lasts 76.8 Earth days, shorter than Mercury's 88-day year. It orbits at an average distance of 0.369 AU — closer to its star than Mercury is to the Sun. Its orbit is highly elliptical (eccentricity 0.45), swinging dramatically closer to and farther from its star.
How Was TIC 279401253 b Discovered?
TIC 279401253 b was discovered in 2023 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 TIC 279401253 b?
TIC 279401253 b is 931.4 light-years (285.6 parsecs) from Earth. Light arriving here tonight left the planet around the year 1095. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 16,392,640 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. TIC 279401253 b scores 0.17, ranking #4,087 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: TIC 279401253
TIC 279401253
- Surface temperature
- 5,951 K (Sun: 5,772 K)
- Mass
- 1.13 M☉
- Radius
- 1.06 R☉
- Luminosity
- 1.2500 L☉
- Age
- 1.2 billion years (Sun: 4.6)
The TIC 279401253 Planetary System
TIC 279401253 b is one of 2 known planets in the TIC 279401253 system. Its siblings:
- TIC 279401253 c (Cold Gas Giant)
TIC 279401253 b — Complete Data
| Radius | 11.209 Earth radii (1.000 Jupiter radii) |
|---|---|
| Mass | 1,951.47 Earth masses (6.140 Jupiter masses) |
| Orbital period | 76.80 days |
| Orbital distance | 0.369 AU |
| Eccentricity | 0.448 |
| Earth Similarity Index | 0.17 |
| Distance from Earth | 931.4 light-years (285.6 parsecs) |
| Constellation | Eridanus |
| Discovery method | Transit |
| Discovery facility | Transiting Exoplanet Survey Satellite (TESS) |
| Discovery year | 2023 |
Data: NASA Exoplanet Archive, last updated 2023-03-15. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About TIC 279401253 b
Is TIC 279401253 b habitable?
No — TIC 279401253 b orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is TIC 279401253 b?
TIC 279401253 b is about 931 light-years from Earth in the constellation Eridanus. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 16,392,640 years to get there.
How big is TIC 279401253 b compared to Earth?
TIC 279401253 b has 11.21 times the radius of Earth and about 1,951 times its mass.
How long is a year on TIC 279401253 b?
One orbit around TIC 279401253 takes 76.8 Earth days.
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