OGLE-TR-56 b
OGLE-TR-56 b is a hot Jupiter orbiting OGLE-TR-56 in the constellation Sagittarius. It lies about 923 light-years from Earth and 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.
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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.
How Far Away Is OGLE-TR-56 b?
OGLE-TR-56 b is 922.5 light-years (282.8 parsecs) from Earth. Light arriving here tonight left the planet around the year 1104. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 16,236,000 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. OGLE-TR-56 b scores 0.06, ranking #5,148 of 5,565 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 |
| Distance from Earth | 922.5 light-years (282.8 parsecs) |
| 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 far away is OGLE-TR-56 b?
OGLE-TR-56 b is about 923 light-years from Earth in the constellation Sagittarius. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 16,236,000 years to get there.
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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