OGLE-TR-56 b
OGLE-TR-56 b is a hot Jupiter orbiting OGLE-TR-56 in the constellation Sagittarius. It was discovered in 2002 using the transit method.
How Big Is OGLE-TR-56 b?
OGLE-TR-56 b has a radius of 15.28 times that of Earth, or 1.36 times the radius of Jupiter. Its mass is 442 times that of Earth, giving it a density of 0.68 g/cm³ — closer to gas planets like Jupiter (1.33 g/cm³).
Is OGLE-TR-56 b in the Habitable Zone?
OGLE-TR-56 b orbits inside the inner edge of the habitable zone of OGLE-TR-56. So close to its star, surface conditions are far too hot for liquid water.
Habitable zone of OGLE-TR-56: 1.104–2.585 AU (conservative: 1.399–2.451 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 ›
Temperature on OGLE-TR-56 b
The equilibrium temperature of OGLE-TR-56 b is about 2,212 K (1,939 °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 OGLE-TR-56 b — one full orbit around OGLE-TR-56 — lasts just 29.1 hours, shorter than Mercury's 88-day year. It orbits at an average distance of 0.024 AU — closer to its star than Mercury is to the Sun.
How Was OGLE-TR-56 b Discovered?
OGLE-TR-56 b was discovered in 2002 using the transit method, with observations from OGLE.
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.
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. OGLE-TR-56 b scores 0.06, ranking #5,151 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: OGLE-TR-56
OGLE-TR-56
- Surface temperature
- 6,050 K (Sun: 5,772 K)
- Mass
- 1.23 M☉
- Radius
- 1.36 R☉
- Luminosity
- 2.2387 L☉
Planetary System
OGLE-TR-56 b is the only planet known to orbit OGLE-TR-56 so far.
OGLE-TR-56 b — Complete Data
| Radius | 15.278 Earth radii (1.363 Jupiter radii) |
|---|---|
| Mass | 441.77 Earth masses (1.390 Jupiter masses) |
| Density | 0.68 g/cm³ (Earth: 5.51) |
| Orbital period | 1.21 days |
| Orbital distance | 0.024 AU |
| Equilibrium temperature | 2,212 K (1,939 °C) |
| Earth Similarity Index | 0.06 |
| Constellation | Sagittarius |
| Discovery method | Transit |
| Discovery facility | OGLE |
| Discovery year | 2002 |
Data: NASA Exoplanet Archive, last updated 2022-03-16. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About OGLE-TR-56 b
Is OGLE-TR-56 b habitable?
No — OGLE-TR-56 b orbits too close to its star and is too hot for liquid water to exist on its surface.
How big is OGLE-TR-56 b compared to Earth?
OGLE-TR-56 b has 15.28 times the radius of Earth and about 442 times its mass.
How long is a year on OGLE-TR-56 b?
One orbit around OGLE-TR-56 takes 1.2 Earth days — short enough that 301 of its years would fit into one Earth year.
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