DS Tuc A is 144 light-years from the Sun. The NASA Exoplanet Archive lists 1 planet around this G6 V star; the first was found in 2019 by transit (Transiting Exoplanet Survey Satellite (TESS)).
Fly there in 3DDS Tuc A b goes round its star every 8.14 days, 11 times as often as Mercury goes round the Sun.
DS Tuc A is one of 2 stars in its system: the other is drawn where the Washington Double Star Catalog measures it on the sky.
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.
| Spectral type | G6 V |
| Surface temperature | 5,428 K |
| Mass | 1.01 solar masses |
| Radius | 0.964 solar radii |
| Luminosity | 0.725 times the Sun |
| Apparent magnitude | 8.17 |
| Age | about 0.045 billion years |
| Distance from the Sun | 143.7 light-years (44.1 parsecs) |
| Position (J2000) | RA 354.9155°, Dec -69.1960° |
| Constellation | Tucana |
DS Tuc B has no spectral type listed of magnitude 9.65, moving through space with it. In 2021 it was 3.9″ from DS Tuc A, at position angle 347° (Washington Double Star Catalog, 23397-6912 R 348 AB): 172 AU on the sky at this distance. The true distance can only be larger. Its colour is estimated from its brightness.
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| DS Tuc A b | 8.14 days | 0.0795 AU from Kepler’s law | 5.7 R⊕ | 413.18 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.