HD 202772 A

Planetary system · 526.7 light-years away · also HD 202772 A

HD 202772 A is 527 light-years from the Sun. The NASA Exoplanet Archive lists 1 planet around this 6,442 K star; the first was found in 2019 by transit (Transiting Exoplanet Survey Satellite (TESS)).

Fly there in 3D

Worth knowing

HD 202772 A b goes round its star every 3.31 days, 27 times as often as Mercury goes round the Sun.

HD 202772 A is one of 2 stars in its system: the other is drawn where the Washington Double Star Catalog measures it on the sky.

The star

Surface temperature6,442 K
Mass1.721 solar masses
Radius2.554 solar radii
Luminosity10.22 times the Sun
Apparent magnitude8.324
Ageabout 1.63 billion years
Distance from the Sun526.7 light-years (161.5 parsecs)
Position (J2000)RA 319.6996°, Dec -26.6164°
ConstellationCapricornus

The other star

HD 202772 B has no spectral type listed of magnitude 10.21, moving through space with it. In 2019 it was 1.3″ from HD 202772 A, at position angle 295° (Washington Double Star Catalog, 21188-2637 SEE 443): 210 AU on the sky at this distance. The true distance can only be larger. Its colour is estimated from its brightness.

Planets (1)

PlanetYearOrbitRadiusMassFound
HD 202772 A b3.31 days0.0521 AU18.237 R⊕323.55 M⊕Transit, 2019

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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