Exoplanet

K2-280 b

Orbiting K2-280

Overview

K2-280 b is an exoplanet orbiting the star K2-280, discovered in 2018 using the Transit method. It is a Neptune-sized world.

Key Measurements

Radius

7.50

Earth radii

015 R⊕

Mass

37.10

Earth masses

0500 M⊕

Orbital Period

19.9

days

0.1d10,000d

Distance

391.5

parsecs

Nearby10,000 pc

Equilibrium Temp

787

K

150 K3,500 K

Radius (Earth radii)

7.50

Mass (Earth masses)

37.10

Measured

Equilibrium Temperature

787 K

Parameter source: Nowak et al. 2020

Orbital Period

19.895+0.000−0.000days

Semi-Major Axis

0.1461+0.0099−0.0097au

Planet Mass (Earth masses)

37.10+5.60−5.60

Planet Mass (Jupiter masses)

0.1167+0.0176−0.0176

Eccentricity

0.3500+0.0500−0.0400

Epoch of Periastron

2457315.06+0.38−0.44days(BJD-TDB)

Argument of Periastron

246.8+4.5−5.3deg

Radial Velocity Semi-Amplitude

9.18+1.27−1.27m/s

Distance from Earth

391.5 pc (~1277 ly)

Spectral Type

Unknown

Temperature

5500 K

Mass (Solar)

1.03 M☉

Radius (Solar)

1.28 R☉

Luminosity

Unknown

Planets in System

1

Stars in System

1

Coordinates (RA, Dec)

291.5954°, -22.2477°

Discovery Method

Transit

Discovery Year

2018

Data Sources
NASA Exoplanet Archive

Source ID: K2-280 b

System Context

K2-280 b orbits K2-280 and was reported in 2018 and was detected with the Transit method.

Published measurements list a radius of 7.5 Earth radii, a mass of 37.1 Earth masses, an orbital period of 19.9 days, and an equilibrium temperature near 787 K.

Catalog data places the system at about 391.5 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 K2-280
K2-280 b