omi CrB b
omi CrB b is a cold gas giant orbiting the K0 III star omi CrB in the constellation Corona Borealis. It lies about 277 light-years from Earth and was discovered in 2012 using the radial velocity method.
Is omi CrB b in the Habitable Zone?
omi CrB b orbits inside the inner edge of the habitable zone of omi CrB. So close to its star, surface conditions are far too hot for liquid water.
Habitable zone of omi CrB: 6.448–15.739 AU (conservative: 8.167–14.922 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 omi CrB b — one full orbit around omi CrB — lasts 187.0 Earth days, between the years of Mercury (88 days) and Earth (365 days). It orbits at an average distance of 0.699 AU — comparable to the inner Solar System. Its orbit is mildly elliptical (eccentricity 0.11).
How Was omi CrB b Discovered?
omi CrB b was discovered in 2012 using the radial velocity method, with observations from Okayama Astrophysical 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 omi CrB b?
omi CrB b is 276.5 light-years (84.8 parsecs) from Earth. Light arriving here tonight left the planet around the year 1750. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 4,866,400 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. omi CrB b scores 0.07, ranking #4,847 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: omi CrB
omi CrB
- Spectral type
- K0 III
- Surface temperature
- 4,769 K (Sun: 5,772 K)
- Mass
- 1.30 M☉
- Radius
- 11.87 R☉
- Luminosity
- 66.3697 L☉
Planetary System
omi CrB b is the only planet known to orbit omi CrB so far.
omi CrB b — Complete Data
| Mass (best estimate) | 355.97 Earth masses |
|---|---|
| Orbital period | 187.01 days |
| Orbital distance | 0.699 AU |
| Eccentricity | 0.105 |
| Earth Similarity Index | 0.07 |
| Distance from Earth | 276.5 light-years (84.8 parsecs) |
| Constellation | Corona Borealis |
| Discovery method | Radial Velocity |
| Discovery facility | Okayama Astrophysical Observatory |
| Discovery year | 2012 |
Data: NASA Exoplanet Archive, last updated 2023-09-19. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About omi CrB b
Is omi CrB b habitable?
No — omi CrB b orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is omi CrB b?
omi CrB b is about 277 light-years from Earth in the constellation Corona Borealis. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 4,866,400 years to get there.
How long is a year on omi CrB b?
One orbit around omi CrB takes 187.0 Earth days.
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