About this world
TOI-1052 c is a Neptune-like planet orbiting TOI-1052, a yellow-white F-type star 423 light-years from Earth. It is about 0.58 times the size of Jupiter (its size estimated from its mass), with at least 0.11 Jupiter masses (a minimum, measured by radial velocity). It completes an orbit every 35.8 days at 0.23 AU from its star, closer than Mercury is to the Sun, on a strongly elongated orbit (e = 0.24).
Its equilibrium temperature is about 719 K (446 °C): far too hot for liquid water on its surface. At its size it almost certainly keeps a deep envelope of hydrogen and helium.
It was discovered in 2023 by radial velocity with Multiple Observatories. The star wobbles toward and away from us, Doppler-shifting its spectrum. TOI-1052 has 2 known planets; the others are TOI-1052 b.