Exoplanet

KELT-9 b

Orbiting KELT-9

Overview

KELT-9 b is an exoplanet orbiting the star KELT-9, discovered in 2017 using the Transit method. It is a Jupiter-sized world.

Key Measurements

Radius

21.20

Earth radii

015 R⊕

Mass

915.35

Earth masses

0500 M⊕

Orbital Period

1.5

days

0.1d10,000d

Distance

204.5

parsecs

Nearby10,000 pc

Equilibrium Temp

4050

K

150 K3,500 K

Radius (Earth radii)

21.20

Mass (Earth masses)

915.35

Measured

Equilibrium Temperature

4050 K

Orbital Period

1.48 days

Distance from Earth

204.5 pc (~667 ly)

Spectral Type

B9.5-A0

Temperature

10170 K

Mass (Solar)

2.52 M☉

Radius (Solar)

2.36 R☉

Luminosity

1.72 log L☉

Planets in System

1

Stars in System

2

Coordinates (RA, Dec)

307.8599°, 39.9389°

Discovery Method

Transit

Discovery Year

2017

Data Sources
NASA Exoplanet Archive

Source ID: KELT-9 b

System Context

KELT-9 b orbits KELT-9 and was reported in 2017 and was detected with the Transit method.

Published measurements list a radius of 21.2 Earth radii, a mass of 915.35 Earth masses, an orbital period of 1.48 days, and an equilibrium temperature near 4,050 K.

Catalog data places the system at about 204.5 parsecs from Earth, a host star classified as B9.5-A0, and 1 known planet in the system.

Host star

Explore the stellar record for this system to compare temperature, spectral type, and known planets.

Open KELT-9