NGTS-13b

NGTS-13b is an exoplanet that was discovered by NGTS. It takes 4.12 days to orbit its host star and its discovery was announced in January 2021.

NGTS-13b

Discovery[1]
Discovered by	Grieves et al.
Discovery site	Paranal Observatory in Chile
Discovery date	2021
Detection method	Transit
Orbital characteristics[1]
Semi-major axis	0.0549+0.0015 −0.0025 AU
Eccentricity	0.086±0.034
Orbital period (sidereal)	4.12±0.00 d
Inclination	88.7±1.2 º
Time of perihelion	2458573±0
Argument of perihelion	−146.4±24.2 º
Semi-amplitude	526.1±9.5 m/s
Star	NGTS-13
Physical characteristics
Mean radius	1.142±0.046 RJ [1]
Mass	4.84±0.44 MJ [1]
Mean density	4.02±0.55 g/cm3 [1]
Temperature	1605±30 K [1]

Discovery

The planet was discovered by the Next Generation Transit Survey, and the paper states that exoplanets are usually not found around giants and subgiants due to the host engulfing the planet.

Properties

NGTS-13b has 4 times more mass than Jupiter, but maintains a radius similar to the Jovian planet. The planet has a typical 4 day orbit of a Hot Jupiter, and has an average temperature of 1,605 K, but has a hotter dayside temperature of 1,828 K.^[2]

Size comparison

Jupiter	NGTS-13b