TIC 393818343 c: Discovery and characterization of a Neptune-like planet in the Delphinus constellation

TL;DR

This paper reports the discovery and characterization of a second Neptune-like planet in the TIC 393818343 system, expanding knowledge of multi-planet systems with diverse orbital configurations.

Contribution

It provides the first statistical confirmation of a second planet in the TIC 393818343 system, including detailed orbital parameters and observational data.

Findings

Discovery of a second planet with a 7.85-day orbit.

Confirmation of the first Warm Jupiter planet.

Identification of a multi-planet system.

Abstract

We report on the statistical confirmation of a second planet inside the TIC 393818343 system. The first planet TIC 393818343 b has been confirmed and classified as a Warm Jupiter planet with a period of P = (16.24921 +- 0.00003) days. The second planet in the system has an orbital period of P = (7.8458 +- 0.0023) days and orbits 2.05 times closer to its host star. The second planet was initially spotted by the Las Cumbres Observatory (LCOGT) and amateur astronomers. This Super-Neptunian exoplanet marks TIC 393818343 as a multi-planetary system.