HD 135344 A

Planetary system · 461.8 light-years away · also HD 135344 A

HD 135344 A is 462 light-years from the Sun. The NASA Exoplanet Archive lists 1 planet around this A0 V star; the first was found in 2025 by imaging (Paranal Observatory).

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Worth knowing

HD 135344 A b was photographed directly: it is one of the few exoplanets seen as its own point of light rather than inferred from its star.

HD 135344 A is one of 2 stars in its system. The position of the other star is not catalogued, so only HD 135344 A 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 typeA0 V
Surface temperature9,540 K
Mass2.32 solar masses
Radius1.5 solar radii
Luminosity16.6 times the Sun
Apparent magnitude7.765
Distance from the Sun461.8 light-years (141.6 parsecs)
Position (J2000)RA 228.9538°, Dec -37.1489°
ConstellationLupus

Planets (1)

PlanetYearOrbitRadiusMassFound
HD 135344 A b44.0 years from Kepler’s law16.500 AU16.253 R⊕3178.3 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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