BD-11 4672 c
BD-11 4672 c is a Neptune-like planet orbiting BD-11 4672 in the constellation Scutum. It lies about 89 light-years from Earth and was discovered in 2020 using the radial velocity method.
Is BD-11 4672 c in the Habitable Zone?
BD-11 4672 c orbits inside the inner edge of the habitable zone of BD-11 4672. So close to its star, surface conditions are far too hot for liquid water.
Habitable zone of BD-11 4672: 0.316–0.780 AU (conservative: 0.401–0.739 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 ›
Orbit and Year Length
A year on BD-11 4672 c — one full orbit around BD-11 4672 — lasts 74.2 Earth days, shorter than Mercury's 88-day year. It orbits at an average distance of 0.300 AU — closer to its star than Mercury is to the Sun. Its orbit is highly elliptical (eccentricity 0.40), swinging dramatically closer to and farther from its star.
How Was BD-11 4672 c Discovered?
BD-11 4672 c was discovered in 2020 using the radial velocity method, with observations from Roque de los Muchachos 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 BD-11 4672 c?
BD-11 4672 c is 88.6 light-years (27.2 parsecs) from Earth. Light arriving here tonight left the planet around the year 1938. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 1,559,360 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. BD-11 4672 c scores 0.52, ranking #230 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: BD-11 4672
BD-11 4672
- Surface temperature
- 4,550 K (Sun: 5,772 K)
- Mass
- 0.65 M☉
- Radius
- 0.64 R☉
- Luminosity
- 0.1570 L☉
- Age
- 7.4 billion years (Sun: 4.6)
The BD-11 4672 Planetary System
BD-11 4672 c is one of 2 known planets in the BD-11 4672 system. Its siblings:
- BD-11 4672 b (Cold Gas Giant)
BD-11 4672 c — Complete Data
| Mass (best estimate) | 15.37 Earth masses |
|---|---|
| Orbital period | 74.20 days |
| Orbital distance | 0.300 AU |
| Eccentricity | 0.400 |
| Earth Similarity Index | 0.52 |
| Distance from Earth | 88.6 light-years (27.2 parsecs) |
| Constellation | Scutum |
| Discovery method | Radial Velocity |
| Discovery facility | Roque de los Muchachos Observatory |
| Discovery year | 2020 |
Data: NASA Exoplanet Archive, last updated 2020-07-17. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About BD-11 4672 c
Is BD-11 4672 c habitable?
No — BD-11 4672 c orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is BD-11 4672 c?
BD-11 4672 c is about 89 light-years from Earth in the constellation Scutum. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 1,559,360 years to get there.
How long is a year on BD-11 4672 c?
One orbit around BD-11 4672 takes 74.2 Earth days.
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