24 Sex b
24 Sex b is a cold gas giant orbiting 24 Sex in the constellation Sextans. It lies about 235 light-years from Earth and was discovered in 2010 using the radial velocity method.
Is 24 Sex b in the Habitable Zone?
24 Sex b orbits inside the inner edge of the habitable zone of 24 Sex. So close to its star, surface conditions are far too hot for liquid water.
Habitable zone of 24 Sex: 2.977–7.171 AU (conservative: 3.771–6.799 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 24 Sex b — one full orbit around 24 Sex — lasts 452.8 Earth days, longer than an Earth year. It orbits at an average distance of 1.333 AU. Its orbit is mildly elliptical (eccentricity 0.09).
How Was 24 Sex b Discovered?
24 Sex b was discovered in 2010 using the radial velocity method, with observations from Lick Observatory.
The radial velocity method measures the subtle wobble of a star caused by the gravitational pull of an orbiting planet, visible as periodic shifts in the star's light spectrum. The size of the wobble reveals the planet's minimum mass.
How Far Away Is 24 Sex b?
24 Sex b is 235.1 light-years (72.1 parsecs) from Earth. Light arriving here tonight left the planet around the year 1791. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 4,137,760 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. 24 Sex b scores 0.18, ranking #4,054 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: 24 Sex
24 Sex
- Surface temperature
- 5,098 K (Sun: 5,772 K)
- Mass
- 1.54 M☉
- Radius
- 4.90 R☉
- Luminosity
- 14.5881 L☉
- Age
- 2.7 billion years (Sun: 4.6)
The 24 Sex Planetary System
24 Sex b is one of 2 known planets in the 24 Sex system. Its siblings:
- 24 Sex c (Cold Gas Giant)
24 Sex b — Complete Data
| Mass (best estimate) | 632.46 Earth masses |
|---|---|
| Orbital period | 452.80 days |
| Orbital distance | 1.333 AU |
| Eccentricity | 0.090 |
| Earth Similarity Index | 0.18 |
| Distance from Earth | 235.1 light-years (72.1 parsecs) |
| Constellation | Sextans |
| Discovery method | Radial Velocity |
| Discovery facility | Lick Observatory |
| Discovery year | 2010 |
Data: NASA Exoplanet Archive, last updated 2014-05-14. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About 24 Sex b
Is 24 Sex b habitable?
No — 24 Sex b orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is 24 Sex b?
24 Sex b is about 235 light-years from Earth in the constellation Sextans. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 4,137,760 years to get there.
How long is a year on 24 Sex b?
One orbit around 24 Sex takes 452.8 Earth days.
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