Exoplanet

Kepler-278 c

Orbiting Kepler-278

Overview

Kepler-278 c is an exoplanet orbiting the star Kepler-278, discovered in 2014 using the Transit method. It is a Mini-Neptune world.

Key Measurements

Radius

3.27

Earth radii

015 R⊕

Mass

34.90

Earth masses

0500 M⊕

Orbital Period

51.1

days

0.1d10,000d

Distance

443.0

parsecs

Nearby10,000 pc

Equilibrium Temp

492

K

150 K3,500 K

Radius (Earth radii)

3.27

Mass (Earth masses)

34.90

Measured

Equilibrium Temperature

492 K

Parameter source: Jofré et al. 2020

Orbital Period

51.111+0.023−0.011days

Semi-Major Axis

0.2870+0.0070−0.0070au

Planet Mass (Earth masses)

34.90+9.90−21.00

Planet Mass (Jupiter masses)

0.1098+0.0311−0.0661

Eccentricity

0.6160+0.0150−0.0230

Argument of Periastron

20.8+7.9−7.9deg

Radial Velocity Semi-Amplitude

6.70+2.40−5.10m/s

Distance from Earth

443.0 pc (~1445 ly)

Spectral Type

K2 III-IV

Temperature

4965 K

Mass (Solar)

1.23 M☉

Radius (Solar)

2.86 R☉

Luminosity

0.65 log L☉

Planets in System

2

Stars in System

1

Coordinates (RA, Dec)

290.1072°, 38.7023°

Discovery Method

Transit

Discovery Year

2014

Data Sources
NASA Exoplanet Archive

Source ID: Kepler-278 c

System Context

Kepler-278 c orbits Kepler-278 and was reported in 2014 and was detected with the Transit method.

Published measurements list a radius of 3.27 Earth radii, a mass of 34.9 Earth masses, an orbital period of 51.11 days, and an equilibrium temperature near 492 K.

Catalog data places the system at about 443 parsecs from Earth, a host star classified as K2 III-IV, and 2 known planets in the system.

Host star

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

Open Kepler-278

More planets in this system

Kepler-278 b