Exoplanet

Kepler-4 b

Orbiting Kepler-4

Overview

Kepler-4 b is an exoplanet orbiting the star Kepler-4, discovered in 2009 using the Transit method. It is a Neptune-sized world.

Key Measurements

Radius

4.00

Earth radii

015 R⊕

Mass

24.47

Earth masses

0500 M⊕

Orbital Period

3.2

days

0.1d10,000d

Distance

487.9

parsecs

Nearby10,000 pc

Equilibrium Temp

1650

K

150 K3,500 K

Radius (Earth radii)

4.00

Mass (Earth masses)

24.47

Measured

Equilibrium Temperature

1650 K

Orbital Period

3.21 days

Distance from Earth

487.9 pc (~1591 ly)

Spectral Type

Unknown

Temperature

5857 K

Mass (Solar)

1.22 M☉

Radius (Solar)

1.49 R☉

Luminosity

0.35 log L☉

Planets in System

1

Stars in System

1

Coordinates (RA, Dec)

285.6154°, 50.1358°

Discovery Method

Transit

Discovery Year

2009

Data Sources
NASA Exoplanet Archive

Source ID: Kepler-4 b

System Context

Kepler-4 b orbits Kepler-4 and was reported in 2009 and was detected with the Transit method.

Published measurements list a radius of 4 Earth radii, a mass of 24.47 Earth masses, an orbital period of 3.21 days, and an equilibrium temperature near 1,650 K.

Catalog data places the system at about 487.9 parsecs from Earth 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 Kepler-4