TOI-3984 A is 355 light-years from the Sun. The NASA Exoplanet Archive lists 1 planet around this M4+/-0.5 star; the first was found in 2023 by transit (Transiting Exoplanet Survey Satellite (TESS)).
Fly there in 3DTOI-3984 A b goes round its star every 4.35 days, 20 times as often as Mercury goes round the Sun.
TOI-3984 A is one of 2 stars in its system. The position of the other star is not catalogued, so only TOI-3984 A and its planets are drawn.
| Spectral type | M4+/-0.5 |
| Surface temperature | 3,476 K |
| Mass | 0.49 solar masses |
| Radius | 0.47 solar radii |
| Luminosity | 0.02666 times the Sun |
| Apparent magnitude | 15.694 |
| Age | about 2.9 billion years |
| Distance from the Sun | 355.1 light-years (108.9 parsecs) |
| Position (J2000) | RA 226.3371°, Dec 36.7870° |
| Constellation | Boötes |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| TOI-3984 A b | 4.35 days | 0.0410 AU | 7.9 R⊕ | 44 M⊕ | Transit, 2023 |
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.