Key parameters at a glance

A radius of 3.67 Earth radii
A mass of 14.67 Earth masses
Surface gravity around 1.09 g
An orbital period of 15.624 days
Semi-major axis 0.1300 AU
Equilibrium temperature 990 K (717 °C)
Distance from Earth 1,047.93 light-years
Earth Similarity Index 0.220
Travel time at Voyager 1 speed 18,480,177 years

2 siblings around EPIC 249893012

EPIC 249893012 c shares its host star with 2 other confirmed planets. Side-by-side measurements below.

Planet	Type	Radius (R⊕)	Mass (M⊕)	Period (d)	Eq. T (K)	Year
EPIC 249893012 b	Super-Earth	1.95	8.75	3.595	1,616	2020
EPIC 249893012 c this	Sub-Neptune	3.67	14.67	15.624	990	2020
EPIC 249893012 d	Sub-Neptune	3.94	10.18	35.747	752	2020

EPIC 249893012 c Planet Profile

Physical Specs

Radius

3.67 R⊕

Radius (Jupiter)

0.327 R♃

Mass

14.67 M⊕

Mass (Jupiter)

0.046 M♃

Density

1.62 g/cm³

Surface Gravity

1.09 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.220

HZ Position Inner

Controversial No

Discovery

Year 2020

Method Transit

Facility K2

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#104of 1978

top 5.2%

This planet

3.67R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

KMT-2023-BLG-0416L b 3.67 R⊕ TOI-3082 b 3.66 R⊕ Kepler-36 c 3.68 R⊕

Metric	Earth	EPIC 249893012 c	Jupiter
Radius (R⊕)	1.00	3.67	11.21
Mass (M⊕)	1.00	14.67	317.83
Density (g/cm³)	5.51	1.62	1.33
Surface Gravity (g)	1.00	1.09	2.53
Insolation (S⊕)	1.00	160.00	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	14.670 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

TIC

TIC 432254760

Gaia DR2

Gaia DR2 6259263137059042048

Gaia DR3

Gaia DR3 6259263137059042048

System

EPIC 249893012

Percentile among Sub-Neptune cohort

Radius 3.670 R⊕ · percentile 95 / cohort 1978

Mass 14.670 M⊕ · percentile 92 / cohort 1978

Orbital period 15.62 d · percentile 52 / cohort 1946

Distance 321.30 pc · percentile 37 / cohort 1975

ESI 0.220 · percentile 10 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

15.624 days

Semi-major axis

0.1300 AU

Eccentricity

0.070

Inclination

87.94 °

Year Length

A year here lasts approximately 15.62 Earth days (4.3% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1300 AU.

Transit Fingerprint

Duration

6.370 h

Impact parameter b

0.600

Rp / R★

0.019700

Transit midpoint (BJD)

2,457,998.8410

Extended Orbital Architecture

Planet / star radius ratio

0.019700

Semi-major axis / stellar radius

15.790

Impact parameter (b)

0.600

RV semi-amplitude (K)

3.660 m/s

Transit mid-time (BJD)

2,457,998.8410

Long. of periastron (ω)

217.00°

Angular separation (arcsec)

0.40500

Eq. Temperature

990K

(717 °C)

Insolation (S⊕)

160.00

Earth = 1.00

Earth Similarity (ESI)

0.220

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water.

Detection Signatures

Transit photometry

A transit dip has been observed from at least one telescope.

Radial velocity

Stellar wobble has been measured spectroscopically.

Discovery Paper

Primary reference

Hidalgo et al. 2020

Instrument

Kepler CCD Array

Publication

2020-04

Observation locale

Space

Discovery cohort

Planets confirmed in 2020 at K2 (12 shown).

EPIC 201170410.02 · Rocky Terrestrial EPIC 201757695.02 · Rocky Terrestrial K2-323 b · Sub-Neptune K2-315 b · Rocky Terrestrial K2-316 c · Super-Earth K2-318 b · Super-Earth K2-325 b · Sub-Neptune K2-317 b · Sub-Neptune K2-322 b · Super-Earth K2-319 b · Sub-Neptune K2-316 b · Super-Earth K2-324 b · Sub-Neptune

Host System: EPIC 249893012

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,430 K — cooler than the Sun (5,778 K)

Estimated Age

9.00 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

1.710 R☉

Stellar Mass

1.050 M☉

Metallicity [Fe/H]

0.20

Extended Stellar Properties

Surface gravity (log g)

3.990 dex

Stellar density

0.298 g/cm³

Systemic radial velocity

22.36 km/s

Rotational v·sin i

2.10 km/s

Rotation period

41.00 days

Metallicity ratio

[Fe/H]

Distance

321.30 parsec

Light-years 1,047.93 ly

V-band magnitude

11.43 mag

Voyager-speed travel 18,480,177 yr

Multi-band Host Photometry — 12 bands

Astrometric Data

Parallax

3.084 mas

Total Proper Motion

36.868 mas/yr

PM Right Ascension

13.55 mas/yr

PM Declination

-34.29 mas/yr

Galactic Cartesian (pc)

x = -0.638 · y = -0.714 · z = -0.288

Equatorial (J2000)

RA 228.24824° · Dec -16.72465°

Galactic ℓ, b

345.110° · 34.308°

Ecliptic λ, β

230.363° · 1.156°

HTM-20 index

-1485107263