HAT-P-13 c
HAT-P-13 c is a exoplanet orbiting HAT-P-13 in the constellation Ursa Major. It lies about 805 light-years from Earth and was discovered in 2009 using the radial velocity method.
Is HAT-P-13 c in the Habitable Zone?
The position of HAT-P-13 c relative to the habitable zone of HAT-P-13 cannot be precisely determined from the available orbital data.
Orbit and Year Length
A year on HAT-P-13 c — one full orbit around HAT-P-13 — lasts 446.3 Earth days, longer than an Earth year. Its orbit is highly elliptical (eccentricity 0.66), swinging dramatically closer to and farther from its star.
How Was HAT-P-13 c Discovered?
HAT-P-13 c was discovered in 2009 using the radial velocity method, with observations from W. M. Keck 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 HAT-P-13 c?
HAT-P-13 c is 805.0 light-years (246.8 parsecs) from Earth. Light arriving here tonight left the planet around the year 1221. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 14,168,000 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. HAT-P-13 c scores 0.36, ranking #680 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: HAT-P-13
HAT-P-13
The HAT-P-13 Planetary System
HAT-P-13 c is one of 2 known planets in the HAT-P-13 system. Its siblings:
- HAT-P-13 b (Hot Jupiter)
HAT-P-13 c — Complete Data
| Mass (best estimate) | 4,538.42 Earth masses |
|---|---|
| Orbital period | 446.27 days |
| Eccentricity | 0.662 |
| Earth Similarity Index | 0.36 |
| Distance from Earth | 805.0 light-years (246.8 parsecs) |
| Constellation | Ursa Major |
| Discovery method | Radial Velocity |
| Discovery facility | W. M. Keck Observatory |
| Discovery year | 2009 |
Data: NASA Exoplanet Archive, last updated 2019-01-28. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About HAT-P-13 c
Is HAT-P-13 c habitable?
HAT-P-13 c is not known to orbit within the habitable zone of HAT-P-13.
How far away is HAT-P-13 c?
HAT-P-13 c is about 805 light-years from Earth in the constellation Ursa Major. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 14,168,000 years to get there.
How long is a year on HAT-P-13 c?
One orbit around HAT-P-13 takes 446.3 Earth days.
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