HIP 70849 b
HIP 70849 b is a cold gas giant orbiting the K7 V star HIP 70849 in the constellation Lupus. It lies about 79 light-years from Earth and was discovered in 2009 using the radial velocity method.
Is HIP 70849 b in the Habitable Zone?
The position of HIP 70849 b relative to the habitable zone of HIP 70849 cannot be precisely determined from the available orbital data.
Orbit and Year Length
A year on HIP 70849 b — one full orbit around HIP 70849 — lasts 3,649.0 Earth days, longer than an Earth year. It orbits at an average distance of 3.990 AU. Its orbit is highly elliptical (eccentricity 0.65), swinging dramatically closer to and farther from its star.
How Was HIP 70849 b Discovered?
HIP 70849 b was discovered in 2009 using the radial velocity method, with observations from La Silla 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 HIP 70849 b?
HIP 70849 b is 78.5 light-years (24.1 parsecs) from Earth. Light arriving here tonight left the planet around the year 1948. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 1,381,600 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. HIP 70849 b scores 0.08, ranking #4,739 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: HIP 70849
HIP 70849 b belongs to a system of 2 stars; it orbits HIP 70849.
HIP 70849
- Spectral type
- K7 V
- Mass
- 0.65 M☉
- Age
- 3.0 billion years (Sun: 4.6)
Planetary System
HIP 70849 b is the only planet known to orbit HIP 70849 so far.
HIP 70849 b — Complete Data
| Mass | 1,430.23 Earth masses (4.500 Jupiter masses) |
|---|---|
| Orbital period | 3,649.00 days |
| Orbital distance | 3.990 AU |
| Eccentricity | 0.650 |
| Earth Similarity Index | 0.08 |
| Distance from Earth | 78.5 light-years (24.1 parsecs) |
| Constellation | Lupus |
| Discovery method | Radial Velocity |
| Discovery facility | La Silla Observatory |
| Discovery year | 2009 |
Data: NASA Exoplanet Archive, last updated 2023-09-05. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About HIP 70849 b
Is HIP 70849 b habitable?
HIP 70849 b is not known to orbit within the habitable zone of HIP 70849, and as a cold gas giant it is an unlikely candidate for life as we know it.
How far away is HIP 70849 b?
HIP 70849 b is about 79 light-years from Earth in the constellation Lupus. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 1,381,600 years to get there.
How long is a year on HIP 70849 b?
One orbit around HIP 70849 takes 3,649.0 Earth days.
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