:INFO Gas giant around KOI-2513 It is 2.80 times Earth's radius, closest in size to Neptune, and 7310.1 times Earth's mass, at 2000.00 g/cm3, denser than Earth. A year there lasts 19.01 days, on an orbit 1.3 times Mercury's distance from the Sun. Its equilibrium temperature is 403 K (derived from the star rather than measured), hotter than any desert. The host star KOI-2513 runs at 5900 K with 0.91 times the Sun's mass. :COUNTER 2000.0 g/cm3: denser than iron at Earth surface pressure :STATS [icon:TARGET] Radius | 2.80 Earth radii [icon:CHART] Mass | 7310.1 Earth masses [icon:FIRE] Equilibrium temperature | 403 K (derived) [icon:CLOCK] One year | 19.01 days [icon:BOLT] Orbit radius | 0.5000 AU [icon:STAR] Host star | KOI-2513 at 5900 K [icon:USERS] Distance | 4468 light-years [icon:TRENDING_DOWN] Starlight blocked | 0.046% at each transit :CHECKLIST What has been measured here and what has not [ ] A radius from transit photometry. Yes. [ ] A weight, not just a width. Yes. [ ] A density, which decides rock or gas. Yes. [ ] A semi-major axis. Yes. [ ] An observed temperature. No. [ ] An eccentricity, so the orbit shape is known. Yes. :PATH What you get from the shadow The depth of the dip is the ratio of the two discs, so the radius follows. :NOTE The archive lists no measured equilibrium temperature for this planet. The 403 K quoted here is derived from the star's output and the orbital distance, assuming a third of the light is reflected. It is an estimate from two numbers, not an observation. :NOTE Found by Kepler in 2023. Kepler watched a single field continuously, so it found the planets that come round often. A world with a long year simply never repeated within the mission. :NOTE.half Size from the shadow, mass from elsewhere. Most transiting planets never get the second half, and without it composition stays a guess. :NOTE.half Its orbit is noticeably elliptical, eccentricity 0.36, so the starlight it receives changes substantially over one year. :THREAD :LINK https://exoplanetarchive.ipac.caltech.edu/overview/KOI-2513.01 NASA Exoplanet Archive: source data, including the values not used here