Key parameters at a glance

A radius of 2.32 Earth radii
A mass of 5.99 Earth masses
Surface gravity around 1.11 g
An orbital period of 23.229 days
Equilibrium temperature 658 K (385 °C)
Distance from Earth 1,043.93 light-years
Earth Similarity Index 0.396
Travel time at Voyager 1 speed 18,409,661 years

1 sibling around EPIC 212587672

EPIC 212587672 c shares its host star with 1 other confirmed planet. Side-by-side measurements below.

Planet	Type	Radius (R⊕)	Mass (M⊕)	Period (d)	Eq. T (K)	Year
EPIC 212587672 b	Super-Earth	1.26	2.13	15.281	756	2019
EPIC 212587672 c this	Sub-Neptune	2.32	5.99	23.229	658	2021

EPIC 212587672 c Planet Profile

Physical Specs

Radius

2.32 R⊕

Radius (Jupiter)

0.207 R♃

Mass

5.99 M⊕

Mass (Jupiter)

0.019 M♃

Density

2.64 g/cm³

Surface Gravity

1.11 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.396

HZ Position Unknown

Controversial No

Discovery

Year 2021

Method Transit

Facility K2

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#1469of 1978

top 74.2%

This planet

2.32R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-321 c 2.32 R⊕ K2-28 b 2.32 R⊕ Kepler-1208 b 2.32 R⊕

Metric	Earth	EPIC 212587672 c	Jupiter
Radius (R⊕)	1.00	2.32	11.21
Mass (M⊕)	1.00	5.99	317.83
Density (g/cm³)	5.51	2.64	1.33
Surface Gravity (g)	1.00	1.11	2.53
Insolation (S⊕)	1.00	—	0.037

Star Catalogue Identifiers

TIC

TIC 771548

Gaia DR2

Gaia DR2 3616620814104819328

Gaia DR3

Gaia DR3 3616620814104819328

System

EPIC 212587672

Percentile among Sub-Neptune cohort

Radius 2.320 R⊕ · percentile 25 / cohort 1978

Mass 5.990 M⊕ · percentile 24 / cohort 1978

Orbital period 23.23 d · percentile 67 / cohort 1946

Distance 320.07 pc · percentile 36 / cohort 1975

ESI 0.396 · percentile 51 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

23.229 days

Semi-major axis

— AU

Eccentricity

—

Inclination

89.42 °

Year Length

A year here lasts approximately 23.23 Earth days (6.4% of a terrestrial year).

Transit Fingerprint

Depth

0.051 %

Duration

3.250 h

Impact parameter b

0.430

Rp / R★

0.021500

Transit midpoint (BJD)

2,457,237.0425

Photometric dip

Transit produces a flux drop of 506 ppm lasting ≈ 3.25 h.

Extended Orbital Architecture

Planet / star radius ratio

0.021500

Semi-major axis / stellar radius

50.740

Impact parameter (b)

0.430

Transit mid-time (BJD)

2,457,237.0425

Eq. Temperature

658K

(385 °C)

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.396

0 = alien, 1 = Earth-identical

Insufficient insolation data — the surface is too hot to retain surface water.

Discovery Paper

Primary reference

De Leon et al. 2021

Instrument

Kepler CCD Array

Publication

2021-08

Observation locale

Space

Discovery cohort

Planets confirmed in 2021 at K2 (12 shown).

EPIC 220492298 b · Rocky Terrestrial EPIC 206042996 c · Rocky Terrestrial EPIC 212624936 b · Rocky Terrestrial EPIC 206024342 c · Super-Earth EPIC 201427007 b · Super-Earth K2-332 b · Sub-Neptune EPIC 212624936 c · Sub-Neptune EPIC 206024342 d · Sub-Neptune K2-345 b · Sub-Neptune K2-349 b · Super-Earth K2-343 c · Sub-Neptune K2-346 b · Sub-Neptune

Host System: EPIC 212587672

Spectral Class

F-type yellow-white

Effective Temperature

6,004 K — hotter than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

0.980 R☉

Stellar Mass

0.990 M☉

Metallicity [Fe/H]

-0.18

Extended Stellar Properties

Surface gravity (log g)

4.450 dex

Stellar density

1.859 g/cm³

Metallicity ratio

[Fe/H]

Distance

320.07 parsec

Light-years 1,043.93 ly

V-band magnitude

12.49 mag

Voyager-speed travel 18,409,661 yr

Multi-band Host Photometry — 12 bands

Astrometric Data

Parallax

3.097 mas

Total Proper Motion

28.557 mas/yr

PM Right Ascension

-14.72 mas/yr

PM Declination

-24.47 mas/yr

Galactic Cartesian (pc)

x = -0.887 · y = -0.422 · z = -0.188

Equatorial (J2000)

RA 205.44451° · Dec -10.86255°

Galactic ℓ, b

322.417° · 50.095°

Ecliptic λ, β

207.518° · -0.290°

HTM-20 index

142498538