LP 890-9

Planetary system · 105.8 light-years away · also SPECULOOS-2

LP 890-9 is 106 light-years from the Sun. The NASA Exoplanet Archive lists 2 planets around this M6 V star; the first was found in 2022 by transit (Transiting Exoplanet Survey Satellite (TESS)).

Fly there in 3D

Worth knowing

LP 890-9 b goes round its star every 2.73 days, 32 times as often as Mercury goes round the Sun.

The star

Spectral typeM6 V
Surface temperature2,850 K
Mass0.118 solar masses
Radius0.1556 solar radii
Luminosity0.001441 times the Sun
Apparent magnitude18
Ageabout 7.2 billion years
Distance from the Sun105.8 light-years (32.4 parsecs)
Position (J2000)RA 64.1309°, Dec -28.3158°
ConstellationEridanus

Planets (2)

PlanetYearOrbitRadiusMassFound
LP 890-9 b2.73 days0.0187 AU1.32 R⊕13.2 M⊕Transit, 2022
LP 890-9 c8.46 days0.0398 AU1.367 R⊕25.3 M⊕Transit, 2022

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 2,850 K, 0.0014 times as bright as the Sun, the habitable zone, where starlight could keep water liquid on a rocky surface, runs from about 0.040 to 0.079 AU. 1 of its 2 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 106 years ago, around 1920.

Nearest systems to it

Also found by Transiting Exoplanet Survey Satellite (TESS)

Sources

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