Star system, 370 light-years
PDS 70 and its two planets
PDS 70 b is an exoplanet 21.9696 times Earth's width, about 2.0 times Jupiter's, 370 light-years away, orbiting farther from its star than the habitable zone we compute for it.
PDS 70 is a star of spectral type K7, 370 light-years from us, with two known planets. This page takes them one at a time.
Drawn at the system's own scale, every orbit from the Archive's numbers.
What is measured, what is computed, what is imagined.
measured The period, and where the table says so the width and the mass, by the method named in each section.
computed Anything marked computed: the size of an orbit where Kepler's third law corrects the table, the temperature of a bare ball at that distance, the starlight received, and the habitable zone.
imagined The picture is an artist's impression. Nobody has seen the surface of a planet of another star: its colour, clouds and land are not known, and the share picture says so in its corner.
The planets
PDS 70 b
PDS 70 b is an exoplanet 21.9696 times Earth's width, about 2.0 times Jupiter's, 370 light-years away, orbiting farther from its star than the habitable zone we compute for it.
- Width
- 21.9696 × Earth's measured
- Mass
- 1,017 times Earth's measured
- One year
- 43,500 days measured
- Distance from its star
- 24.06 au computed from the period and the star's mass
- Temperature of a bare ball there
- 40 K computed, not measured
- Starlight, against Earth's
- 0.000605 × computed
It was photographed directly, a faint dot beside the glare of its star in 2018. Its orbit is farther from its star than the habitable zone computed for it. The Archive's own distance for it is 20.8 au; the three papers behind its period, its star's mass and that distance do not agree with Kepler's third law, so the page uses the one the period and the star's mass give.
See PDS 70 b in 3D · The picture is an artist's impression.
PDS 70 c
PDS 70 c is an exoplanet 22.1938 times Earth's width, about 2.0 times Jupiter's, 370 light-years away, orbiting farther from its star than the habitable zone we compute for it.
- Width
- 22.1938 × Earth's measured
- Mass
- 2,384 times Earth's measured
- One year
- 74,042 days measured
- Distance from its star
- 34.3 au from the Archive
- Temperature of a bare ball there
- 33 K computed, not measured
- Starlight, against Earth's
- 0.000297 × computed
It was photographed directly, a faint dot beside the glare of its star in 2019. Its orbit is farther from its star than the habitable zone computed for it.
See PDS 70 c in 3D · The picture is an artist's impression.
The star
- Surface temperature
- 4,109 K
- Width
- 1.26 × the Sun's
- Mass
- 0.982 × the Sun's
- Spectral type
- K7
- Distance
- 370 light-years
- Habitable zone, computed
- 0.6063 to 1.142 au from the star