PDS 70

Planetary system · 368.8 light-years away

PDS 70 is 369 light-years from the Sun. The NASA Exoplanet Archive lists 2 planets around this K7 star; the first was found in 2018 by imaging (Paranal Observatory).

Fly there in 3D

Worth knowing

PDS 70 b was photographed directly: it is one of the few exoplanets seen as its own point of light rather than inferred from its star.

Where the archive gives only a period or only an orbit size, the other is worked out from Kepler’s third law with the star’s mass.

The star

Spectral typeK7
Surface temperature4,109 K
Mass0.982 solar masses
Radius1.26 solar radii
Luminosity0.35 times the Sun
Apparent magnitude12.032
Ageabout 0.008 billion years
Distance from the Sun368.8 light-years (113.1 parsecs)
Position (J2000)RA 212.0421°, Dec -41.3980°
ConstellationCentaurus

Planets (2)

PlanetYearOrbitRadiusMassFound
PDS 70 b119.1 years20.800 AU21.97 R⊕1017.1 M⊕Imaging, 2018
PDS 70 c202.7 years from Kepler’s law34.300 AU22.194 R⊕2383.7 M⊕Imaging, 2019

Values are the NASA Exoplanet Archive’s composite parameters. A radius marked estimated comes from a mass–radius relation; a mass marked minimum is M sin i. Planet sizes and colours in the 3D view are renderings: none of these worlds has been photographed as more than a point of light.

The planets, compared

For a star of 4,109 K, 0.35 times as bright as the Sun, the habitable zone, where starlight could keep water liquid on a rocky surface, runs from about 0.61 to 1.14 AU. None of its known planets orbits inside it. The zone says how much starlight arrives, not whether a planet has water or air. The edges follow Kopparapu et al. (2014), as the 3D view draws them.

The light you see left 369 years ago, around 1660.

Nearest systems to it

Also found by Paranal Observatory

Sources

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