DMPP-2

Planetary system · 449.9 light-years away · also HD 11231, HIP 8501

DMPP-2 is 450 light-years from the Sun. The NASA Exoplanet Archive lists 3 planets around this F5 V star; the first was found in 2019 by radial velocity (Multiple Facilities).

Fly there in 3D

Worth knowing

DMPP-2 c goes round its star every 3.17 days, 28 times as often as Mercury goes round the Sun.

The star

Spectral typeF5 V
Surface temperature6,500 K
Mass1.41 solar masses
Radius1.78 solar radii
Luminosity1.27 times the Sun
Apparent magnitude8.57
Ageabout 2 billion years
Distance from the Sun449.9 light-years (137.9 parsecs)
Position (J2000)RA 27.4077°, Dec -34.4591°
ConstellationFornax

Planets (3)

PlanetYearOrbitRadiusMassFound
DMPP-2 c3.17 days0.0479 AU8.26 R⊕ estimated51.79 M⊕ minimumRadial Velocity, 2026
DMPP-2 b5.20 days0.0664 AU14.2 R⊕ estimated171.48 M⊕ minimumRadial Velocity, 2019
DMPP-2 d16.5 days0.143 AU11.6 R⊕ estimated91.79 M⊕ minimumRadial Velocity, 2026

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 6,500 K, 1.3 times as bright as the Sun, the habitable zone, where starlight could keep water liquid on a rocky surface, runs from about 1.03 to 1.78 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 450 years ago, around 1580.

Nearest systems to it

Also found by Multiple Facilities

Sources

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