Exoplanet

K2-312 c

Orbiting HD 80653

Overview

K2-312 c is an exoplanet orbiting the star HD 80653, discovered in 2023 using the Radial Velocity method.

Key Measurements

Minimum Mass (M sin i)

1681.31

Earth masses

0500 M⊕

Orbital Period

871.3

days

0.1d10,000d

Distance

109.9

parsecs

Nearby10,000 pc

Equilibrium Temp

229

K

150 K3,500 K

Radius (Earth radii)

Unknown

Minimum Mass, M sin(i) (Earth masses)

1681.31

Radial-velocity minimum

Equilibrium Temperature

229 K

Parameter source: Naponiello et al. 2026

Orbital Period

871.320+0.130−0.130days

Semi-Major Axis

1.8820+0.0800−0.0810au

M sin(i) (Earth masses)

1681.31+63.57−69.92

M sin(i) (Jupiter masses)

5.2900+0.2000−0.2200

Eccentricity

0.8435+0.0013−0.0013

Argument of Periastron

41.3+0.5−0.5deg

Radial Velocity Semi-Amplitude

191.60+1.30−1.30m/s

Distance from Earth

109.9 pc (~358 ly)

Spectral Type

G0 V

Temperature

5959 K

Mass (Solar)

1.15 M☉

Radius (Solar)

1.20 R☉

Luminosity

0.21 log L☉

Planets in System

2

Stars in System

1

Coordinates (RA, Dec)

140.3391°, 14.3679°

Discovery Method

Radial Velocity

Discovery Year

2023

Data Sources
NASA Exoplanet Archive

Source ID: K2-312 c

System Context

K2-312 c orbits HD 80653 and was reported in 2023 and was detected with the Radial Velocity method.

Published measurements list a minimum mass of 1,681.31 Earth masses (M sin i), an orbital period of 871.32 days, and an equilibrium temperature near 229 K.

Catalog data places the system at about 109.9 parsecs from Earth, a host star classified as G0 V, 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 HD 80653

More planets in this system

HD 80653 b