![KOI-2513.01: 2000.0 Grams Per Cubic Centimetre](https://cdn.slatesource.com/f/3/2/f3216d49-5bc5-40cc-8a74-049417758571.webp) # KOI-2513.01: 2000.0 Grams Per Cubic Centimetre - [Made in Slatesource](https://slatesource.com/@steph/koi-2513-01-2000-0-grams-per-cubic-centimetre) - By [Steph](https://slatesource.com/@steph) - Created on Sep 19, 2026 ## 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. **2000.0** g/cm3: denser than iron at Earth surface pressure Radius 2.80 Earth radii Mass 7310.1 Earth masses Equilibrium temperature 403 K (derived) One year 19.01 days Orbit radius 0.5000 AU Host star KOI-2513 at 5900 K Distance 4468 light-years Starlight blocked 0.046% at each transit What has been measured here and what has not 0% 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. What you get from the shadow The depth of the dip is the ratio of the two discs, so the radius follows. 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. 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. Size from the shadow, mass from elsewhere. Most transiting planets never get the second half, and without it composition stays a guess. Its orbit is noticeably elliptical, eccentricity 0.36, so the starlight it receives changes substantially over one year. # Half the temperatures quoted for exoplanets are calculated from the star, not \\ measured at the planet. Should a page like this show them at all, or leave the field blank? No comments yet. Be the first. Log in to comment [NASA Exoplanet Archive: source data, including the values not used here](https://exoplanetarchive.ipac.caltech.edu/overview/KOI-2513.01?utm_source=slatesource)