WISPIT 1

Planetary system · 750.2 light-years away

WISPIT 1 is 750 light-years from the Sun. The NASA Exoplanet Archive lists 2 planets around this K4 V star; the first was found in 2025 by imaging (Paranal Observatory).

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Worth knowing

WISPIT 1 b was photographed directly: it is one of the few exoplanets seen as its own point of light rather than inferred from its star.

WISPIT 1 is one of 2 stars in its system. The position of the other star is not catalogued, so only WISPIT 1 and its planets are drawn.

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 typeK4 V
Surface temperature4,670 K
Mass0.72 solar masses
Radius1.1161 solar radii
Luminosity0.4785 times the Sun
Apparent magnitude13.182
Ageabout 0.0156 billion years
Distance from the Sun750.2 light-years (230.0 parsecs)
Position (J2000)RA 117.7986°, Dec -50.1377°
ConstellationPuppis

Planets (2)

PlanetYearOrbitRadiusMassFound
WISPIT 1 b7323.8 years from Kepler’s law338.000 AU12.4 R⊕ estimated3305.4 M⊕Imaging, 2025
WISPIT 1 c28692.7 years from Kepler’s law840.000 AU12.8 R⊕ estimated1684.5 M⊕Imaging, 2025

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.

Sources

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