:INFO
Gas giant around TOI-1898
It is 0.84 times Jupiter's radius, closest in size to Saturn, and 129.0 times Earth's mass, at 0.85 g/cm3, less dense than Earth. A year there lasts 45.52 days, on an orbit 1 times closer to its star than Mercury is to the Sun. Its equilibrium temperature is 675 K, hotter than any desert. The host star TOI-1898 runs at 6241 K with 1.25 times the Sun's mass.

:STATS
[icon:TARGET] Radius | 9.40 Earth radii
[icon:CHART] Mass | 129.0 Earth masses
[icon:FIRE] Equilibrium temperature | 675 K (measured)
[icon:CLOCK] One year | 45.52 days
[icon:BOLT] Orbit radius | 0.2690 AU
[icon:STAR] Host star | TOI-1898 at 6241 K
[icon:USERS] Distance | 260 light-years
[icon:TRENDING_DOWN] Starlight blocked | 0.285% at each transit

:PATH
What the transit gives
How deep the star dims fixes the planet's size relative to it.

: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.

:NOTE
A transit gives the radius and a separate measurement gives the mass. Having both is what makes a density, and a density is the only clue to composition at this range.

:NOTE
Its orbit is noticeably elliptical, eccentricity 0.48, so the starlight it receives changes substantially over one year.

:LINK
https://exoplanetarchive.ipac.caltech.edu/overview/TOI-1898%20b
NASA Exoplanet Archive: every published measurement of this planet