Key parameters at a glance

A radius of 2.74 Earth radii
A mass of 7.95 Earth masses
Surface gravity around 1.06 g
An orbital period of 19.992 days
Equilibrium temperature 687 K (414 °C)
Distance from Earth 1,596.10 light-years
Earth Similarity Index 0.356
Travel time at Voyager 1 speed 28,147,276 years

1 sibling around K2-350

K2-350 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
K2-350 b	Super-Earth	1.54	2.99	4.164	1,158	2021
K2-350 c this	Sub-Neptune	2.74	7.95	19.992	687	2016

K2-350 c Planet Profile

Physical Specs

Radius

2.74 R⊕

Radius (Jupiter)

0.244 R♃

Mass

7.95 M⊕

Mass (Jupiter)

0.025 M♃

Density

2.12 g/cm³

Surface Gravity

1.06 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.356

HZ Position Unknown

Controversial No

Discovery

Year 2016

Method Transit

Facility K2

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#815of 1978

top 41.2%

This planet

2.74R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-212 c 2.74 R⊕ Kepler-192 b 2.74 R⊕ Kepler-1118 b 2.74 R⊕

Metric	Earth	K2-350 c	Jupiter
Radius (R⊕)	1.00	2.74	11.21
Mass (M⊕)	1.00	7.95	317.83
Density (g/cm³)	5.51	2.12	1.33
Surface Gravity (g)	1.00	1.06	2.53
Insolation (S⊕)	1.00	—	0.037

Star Catalogue Identifiers

TIC

TIC 294319820

Gaia DR2

Gaia DR2 3606709167752821632

Gaia DR3

Gaia DR3 3606709167752821632

System

K2-350

Percentile among Sub-Neptune cohort

Radius 2.740 R⊕ · percentile 59 / cohort 1978

Mass 7.950 M⊕ · percentile 54 / cohort 1978

Orbital period 19.99 d · percentile 62 / cohort 1946

Distance 489.37 pc · percentile 46 / cohort 1975

ESI 0.356 · percentile 42 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

19.992 days

Semi-major axis

— AU

Eccentricity

—

Inclination

— °

Year Length

A year here lasts approximately 19.99 Earth days (5.5% of a terrestrial year).

Transit Fingerprint

Depth

0.075 %

Duration

4.940 h

Impact parameter b

0.450

Rp / R★

0.023900

Transit midpoint (BJD)

2,457,228.1650

Photometric dip

Transit produces a flux drop of 748 ppm lasting ≈ 4.94 h.

Extended Orbital Architecture

Planet / star radius ratio

0.023900

Semi-major axis / stellar radius

28.710

Impact parameter (b)

0.450

Transit mid-time (BJD)

2,457,228.1650

Eq. Temperature

687K

(414 °C)

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.356

0 = alien, 1 = Earth-identical

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

Discovery Paper

Primary reference

Pope et al. 2016

Instrument

Kepler CCD Array

Publication

2016-10

Observation locale

Space

Discovery cohort

Planets confirmed in 2016 at K2 (12 shown).

K2-72 d · Rocky Terrestrial K2-72 b · Rocky Terrestrial K2-91 b · Rocky Terrestrial K2-72 c · Rocky Terrestrial K2-102 b · Super-Earth K2-90 c · Super-Earth K2-72 e · Super-Earth K2-83 b · Rocky Terrestrial K2-88 b · Rocky Terrestrial K2-80 c · Super-Earth K2-83 c · Super-Earth K2-65 b · Super-Earth

Host System: K2-350

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,789 K — hotter than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

1.040 R☉

Stellar Mass

0.980 M☉

Metallicity [Fe/H]

-0.02

Extended Stellar Properties

Surface gravity (log g)

4.390 dex

Stellar density

1.570 g/cm³

Rotation period

8.22 days

Metallicity ratio

[Fe/H]

Distance

489.37 parsec

Light-years 1,596.10 ly

V-band magnitude

13.45 mag

Voyager-speed travel 28,147,276 yr

Multi-band Host Photometry — 12 bands

Astrometric Data

Parallax

2.015 mas

Total Proper Motion

19.645 mas/yr

PM Right Ascension

-18.77 mas/yr

PM Declination

-5.80 mas/yr

Galactic Cartesian (pc)

x = -0.886 · y = -0.395 · z = -0.242

Equatorial (J2000)

RA 204.03551° · Dec -14.00925°

Galactic ℓ, b

319.081° · 47.456°

Ecliptic λ, β

207.373° · -3.721°

HTM-20 index

918524824