Oph 11 b
Oph 11 b is a exoplanet orbiting the M9 star Oph 11 in the constellation Scorpius. It was discovered in 2006 using the imaging method.
Is Oph 11 b in the Habitable Zone?
The position of Oph 11 b relative to the habitable zone of Oph 11 cannot be precisely determined from the available orbital data.
Temperature on Oph 11 b
The equilibrium temperature of Oph 11 b is about 2,175 K (1,902 °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
A year on Oph 11 b — one full orbit around Oph 11 — lasts 7,300,000.0 Earth days, longer than Jupiter's 12-year orbit. It orbits at an average distance of 243.000 AU.
How Was Oph 11 b Discovered?
Oph 11 b was discovered in 2006 using the imaging method, with observations from Gemini 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.
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. Oph 11 b scores 0.07, ranking #4,883 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: Oph 11
Oph 11
- Spectral type
- M9
- Surface temperature
- 2,375 K (Sun: 5,772 K)
- Mass
- 0.02 M☉
- Luminosity
- 0.0017 L☉
- Age
- 5.0 billion years (Sun: 4.6)
Planetary System
Oph 11 b is the only planet known to orbit Oph 11 so far.
Oph 11 b — Complete Data
| Mass | 4,449.62 Earth masses (14.000 Jupiter masses) |
|---|---|
| Orbital period | 7,300,000.00 days |
| Orbital distance | 243.000 AU |
| Equilibrium temperature | 2,175 K (1,902 °C) |
| Earth Similarity Index | 0.07 |
| Constellation | Scorpius |
| Discovery method | Imaging |
| Discovery facility | Gemini Observatory |
| Discovery year | 2006 |
Data: NASA Exoplanet Archive, last updated 2016-03-09. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About Oph 11 b
Is Oph 11 b habitable?
Oph 11 b is not known to orbit within the habitable zone of Oph 11.
How long is a year on Oph 11 b?
One orbit around Oph 11 takes 7,300,000.0 Earth days.
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