Key parameters at a glance

A radius of 4.81 Earth radii
A mass of 20.70 Earth masses
Surface gravity around 0.89 g
An orbital period of 8.368 days
Semi-major axis 0.0627 AU
Equilibrium temperature 488 K (215 °C)
Distance from Earth 1,187.36 light-years
Earth Similarity Index 0.385
Travel time at Voyager 1 speed 20,939,170 years
Almost certainly tidally locked to its host star given the close orbit

K2-14 b Planet Profile

Physical Specs

Radius

4.81 R⊕

Radius (Jupiter)

0.429 R♃

Mass

20.70 M⊕

Mass (Jupiter)

0.065 M♃

Density

1.02 g/cm³

Surface Gravity

0.89 g (Earth)

Classification

Planet Type

Neptune-like

ESI Score 0.385

HZ Position Inner

Controversial No

Discovery

Year 2015

Method Transit

Facility K2

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#412of 574

top 71.6%

This planet

4.81R⊕

Neptune-like median

6.39R⊕

Nearest-size peers

Kepler-1640 b 4.82 R⊕ AU Mic b 4.79 R⊕ GJ 581 b 4.79 R⊕

Metric	Earth	K2-14 b	Jupiter
Radius (R⊕)	1.00	4.81	11.21
Mass (M⊕)	1.00	20.70	317.83
Density (g/cm³)	5.51	1.02	1.33
Surface Gravity (g)	1.00	0.89	2.53
Insolation (S⊕)	1.00	8.00	0.037

Star Catalogue Identifiers

TIC

TIC 366683184

Gaia DR2

Gaia DR2 3892632287473304064

Gaia DR3

Gaia DR3 3892632287473304064

System

K2-14

Percentile among Neptune-like cohort

Radius 4.810 R⊕ · percentile 28 / cohort 574

Mass 20.700 M⊕ · percentile 31 / cohort 574

Orbital period 8.37 d · percentile 32 / cohort 524

Distance 364.05 pc · percentile 52 / cohort 572

ESI 0.385 · percentile 70 / cohort 574

Orbit & Habitability

Orbital Dynamics

Period

8.368 days

Semi-major axis

0.0627 AU

Eccentricity

0.140

Inclination

88.19 °

Year Length

A year here lasts approximately 8.37 Earth days (2.3% of a terrestrial year) on a mildly elliptical path at a mean orbital distance of 0.0627 AU.

Transit Fingerprint

Depth

0.943 %

Duration

2.330 h

Impact parameter b

0.830

Rp / R★

0.110164

Transit midpoint (BJD)

2,456,811.4513

Photometric dip

Transit produces a flux drop of 9,430 ppm lasting ≈ 2.33 h.

Extended Orbital Architecture

Planet / star radius ratio

0.110164

Semi-major axis / stellar radius

30.160

Impact parameter (b)

0.830

Transit mid-time (BJD)

2,456,811.4513

Long. of periastron (ω)

-70.72°

Angular separation (arcsec)

0.17200

Eq. Temperature

488K

(215 °C)

Insolation (S⊕)

8.00

Earth = 1.00

Earth Similarity (ESI)

0.385

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water. Close-orbiting tidally-locked around a cool host.

Discovery Paper

Primary reference

Montet et al. 2015

Instrument

Kepler CCD Array

Publication

2015-08

Observation locale

Space

Discovery cohort

Planets confirmed in 2015 at K2 (12 shown).

K2-18 b · Sub-Neptune K2-9 b · Sub-Neptune K2-3 d · Super-Earth K2-3 c · Super-Earth K2-21 c · Sub-Neptune K2-5 c · Sub-Neptune K2-13 b · Super-Earth K2-3 b · Sub-Neptune K2-17 b · Sub-Neptune K2-21 b · Super-Earth K2-16 c · Sub-Neptune K2-5 b · Super-Earth

Host System: K2-14

Spectral Class

M-type red dwarf

Effective Temperature

3,789 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

0.450 R☉

Stellar Mass

0.470 M☉

Metallicity [Fe/H]

-0.37

Extended Stellar Properties

Surface gravity (log g)

4.891 dex

Stellar density

3.242 g/cm³

Metallicity ratio

[Fe/H]

Distance

364.05 parsec

Light-years 1,187.36 ly

V-band magnitude

15.78 mag

Voyager-speed travel 20,939,170 yr

Multi-band Host Photometry — 12 bands

Astrometric Data

Parallax

2.719 mas

Total Proper Motion

46.875 mas/yr

PM Right Ascension

-39.24 mas/yr

PM Declination

-25.65 mas/yr

Galactic Cartesian (pc)

x = -0.998 · y = 0.034 · z = 0.045

Equatorial (J2000)

RA 178.05687° · Dec 2.59412°

Galactic ℓ, b

270.399° · 61.667°

Ecliptic λ, β

177.182° · 1.607°

HTM-20 index

-886241909