:INFO
Terrestrial around TOI-6255
It is 1.08 times Earth's radius, closest in size to Earth, and 1.4 times Earth's mass. A year there lasts 5.7 hours. The host star TOI-6255 runs at 3421 K with 0.35 times the Sun's mass.

:COUNTER
5.7 hours: one full year, start to finish

:STATS
[icon:TARGET] Radius | 1.08 Earth radii
[icon:CHART] Mass | 1.4 Earth masses
[icon:CLOCK] One year | 5.7 hours
[icon:STAR] Host star | TOI-6255 at 3421 K
[icon:USERS] Distance | 66 light-years
[icon:TRENDING_DOWN] Starlight blocked | 0.071% at each transit

:CHECKLIST
Known and unknown, as the archive has it
[ ] A radius from transit photometry. Yes.
[ ] A mass. Yes.
[ ] A density, which decides rock or gas. No.
[ ] A semi-major axis. No.
[ ] A measured temperature rather than a derived one. No.
[ ] An eccentricity, so the orbit shape is known. Yes.

:PATH
What a crossing measures
Block a known fraction of a known star and you have measured a width.

:NOTE
The size came from a crossing, the mass did not. That pairing is uncommon and it is what lets anyone say whether this is rock or gas.

:NOTE
Found by Transiting Exoplanet Survey Satellite (TESS) in 2024. TESS scans most of the sky in 27-day stretches, so it favours bright nearby stars and short orbits over the faint distant ones Kepler specialised in.

:LINK
https://exoplanetarchive.ipac.caltech.edu/overview/TOI-6255%20b
Every parameter ever published for TOI-6255 b, at the NASA Exoplanet Archive