Post #954by SevenSpheres » 08.03.2023, 20:31
Earth and the Moon compared to the smallest exoplanets detected by each of the four methods currently capable of detecting terrestrial planets. It should be noted that three of these planets only have mass measurements, so the displayed sizes are estimated from a mass-radius relationship and may be different from the true sizes.
From left to right, top to bottom:
- PSR B1257+12 b/Draugr, the least massive exoplanet detected by timing, at 0.02 Earth masses. Texture by cubicApoc.
- The least massive exoplanet with a mass measured by transit timing variations (TTV) is Kepler-138 b at 0.07 Earth masses, and the least massive discovered by TTV is Kepler-138 e at 0.43 Earths. There is an addon for Kepler-138 but it needs to be updated.
- Kepler-37 b, the smallest exoplanet detected by transit, at 0.3 Earth radii. Texture by NASA, included in MrSpace43's addon.
- Proxima Centauri d, the least massive exoplanet detected by radial velocity, with a minimum mass of 0.26 Earths. Texture by ChelseaZ.
- KMT-2020-BLG-0414L b, possibly the least massive exoplanet detected by microlensing, with about the same mass as Earth. Texture by Trolligi depicting it as a Titan-like world.
- The rogue planet candidate OGLE-2016-BLG-1928L may be less massive, at either ~0.3 or ~2 Earth masses. It's included in my microlensing rogue planets addon.
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