TOI-4156 is 697 light-years from the Sun. The NASA Exoplanet Archive lists 2 planets around this 5,972 K star; the first was found in 2026 by transit (Transiting Exoplanet Survey Satellite (TESS)).
Fly there in 3DTOI-4156 b goes round its star every 4.46 days, 20 times as often as Mercury goes round the Sun.
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.
| Surface temperature | 5,972 K |
| Mass | 1.1 solar masses |
| Radius | 1.03963 solar radii |
| Luminosity | 1.25 times the Sun |
| Apparent magnitude | 11.504 |
| Distance from the Sun | 697.1 light-years (213.7 parsecs) |
| Position (J2000) | RA 230.7808°, Dec 76.3319° |
| Constellation | Ursa Minor |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| TOI-4156 b | 4.46 days | 0.0548 AU from Kepler’s law | 2.5382 R⊕ | 6.98 M⊕ estimated | Transit, 2026 |
| TOI-4156 c | 12.8 days | 0.111 AU from Kepler’s law | 2.923 R⊕ | 8.87 M⊕ estimated | Transit, 2026 |
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.