HD 46375 b
HD 46375 b is a hot Jupiter orbiting HD 46375 in the constellation Monoceros. It lies about 96 light-years from Earth and was discovered in 2000 using the radial velocity method.
Is HD 46375 b in the Habitable Zone?
The position of HD 46375 b relative to the habitable zone of HD 46375 cannot be precisely determined from the available orbital data.
Orbit and Year Length
A year on HD 46375 b — one full orbit around HD 46375 — lasts 3.02 Earth days, shorter than Mercury's 88-day year. It orbits at an average distance of 0.040 AU — closer to its star than Mercury is to the Sun. Its orbit is mildly elliptical (eccentricity 0.06).
How Was HD 46375 b Discovered?
HD 46375 b was discovered in 2000 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 HD 46375 b?
HD 46375 b is 96.4 light-years (29.6 parsecs) from Earth. Light arriving here tonight left the planet around the year 1930. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 1,696,640 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. HD 46375 b scores 0.09, ranking #4,524 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: HD 46375
HD 46375 b belongs to a system of 2 stars; it orbits HD 46375.
HD 46375
- Surface temperature
- 5,285 K (Sun: 5,772 K)
- Mass
- 0.92 M☉
Planetary System
HD 46375 b is the only planet known to orbit HD 46375 so far.
HD 46375 b — Complete Data
| Mass (best estimate) | 71.80 Earth masses |
|---|---|
| Orbital period | 3.02 days |
| Orbital distance | 0.040 AU |
| Eccentricity | 0.063 |
| Earth Similarity Index | 0.09 |
| Distance from Earth | 96.4 light-years (29.6 parsecs) |
| Constellation | Monoceros |
| Discovery method | Radial Velocity |
| Discovery facility | W. M. Keck Observatory |
| Discovery year | 2000 |
Data: NASA Exoplanet Archive, last updated 2014-07-23. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About HD 46375 b
Is HD 46375 b habitable?
HD 46375 b is not known to orbit within the habitable zone of HD 46375, and as a hot Jupiter it is an unlikely candidate for life as we know it.
How far away is HD 46375 b?
HD 46375 b is about 96 light-years from Earth in the constellation Monoceros. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 1,696,640 years to get there.
How long is a year on HD 46375 b?
One orbit around HD 46375 takes 3.0 Earth days — short enough that 121 of its years would fit into one Earth year.
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