L 168-9

Planetary system · 82.0 light-years away · also HIP 115211

L 168-9 is 82.0 light-years from the Sun. The NASA Exoplanet Archive lists 1 planet around this M0.5 V star; the first was found in 2020 by transit (Transiting Exoplanet Survey Satellite (TESS)).

Fly there in 3D

Worth knowing

L 168-9 b goes round its star every 33.6 hours, 63 times as often as Mercury goes round the Sun.

The star

Spectral typeM0.5 V
Surface temperature3,842 K
Mass0.614 solar masses
Radius0.604 solar radii
Luminosity0.0723 times the Sun
Apparent magnitude11.005
Distance from the Sun82.0 light-years (25.1 parsecs)
Position (J2000)RA 350.0286°, Dec -60.0657°
ConstellationTucana

Planets (1)

PlanetYearOrbitRadiusMassFound
L 168-9 b33.6 hours0.0208 AU1.63 R⊕4.07 M⊕Transit, 2020

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 3,842 K, 0.072 times as bright as the Sun, the habitable zone, where starlight could keep water liquid on a rocky surface, runs from about 0.28 to 0.53 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 82 years ago, within living memory.

Nearest systems to it

Also found by Transiting Exoplanet Survey Satellite (TESS)

Sources

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