TOI-1278 is 247 light-years from the Sun. The NASA Exoplanet Archive lists 1 planet around this M0 V star; the first was found in 2021 by transit (Transiting Exoplanet Survey Satellite (TESS)).
Fly there in 3DTOI-1278 b goes round its star every 14.5 days, 6 times as often as Mercury goes round the Sun.
| Spectral type | M0 V |
| Surface temperature | 3,799 K |
| Mass | 0.54 solar masses |
| Radius | 0.573 solar radii |
| Luminosity | 0.0614 times the Sun |
| Apparent magnitude | 13.502 |
| Distance from the Sun | 246.5 light-years (75.6 parsecs) |
| Position (J2000) | RA 320.4784°, Dec 35.6486° |
| Constellation | Cygnus |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| TOI-1278 b | 14.5 days | 0.0950 AU | 12.218 R⊕ | 5879.8 M⊕ | Transit, 2021 |
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.