Key parameters at a glance

A radius of 1.00 Earth radii
A mass of 0.97 Earth masses
Surface gravity around 0.97 g
An orbital period of 3.962 days
Distance from Earth 839.67 light-years
Earth Similarity Index 0.993
Travel time at Voyager 1 speed 14,807,505 years
Almost certainly tidally locked to its host star given the close orbit

1 sibling around K2-50

EPIC 201833600 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 201833600 c this	Rocky Terrestrial	1.00	0.97	3.962	—	2019
K2-50 b	Super-Earth	1.59	3.15	8.753	—	2016

EPIC 201833600 c Planet Profile

Physical Specs

Radius

1.00 R⊕

Radius (Jupiter)

0.089 R♃

Mass

0.97 M⊕

Mass (Jupiter)

0.003 M♃

Density

5.34 g/cm³

Surface Gravity

0.97 g (Earth)

Classification

Planet Type

Rocky Terrestrial

ESI Score 0.993

HZ Position Unknown

Controversial No

Discovery

Year 2019

Method Transit

Facility K2

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#335of 570

top 58.6%

This planet

1.00R⊕

Rocky Terrestrial median

1.01R⊕

Nearest-size peers

Kepler-1464 c 1.00 R⊕ Kepler-1417 b 1.00 R⊕ Kepler-392 b 1.00 R⊕

Metric	Earth	EPIC 201833600 c	Jupiter
Radius (R⊕)	1.00	1.00	11.21
Mass (M⊕)	1.00	0.97	317.83
Density (g/cm³)	5.51	5.34	1.33
Surface Gravity (g)	1.00	0.97	2.53
Insolation (S⊕)	1.00	—	0.037

Star Catalogue Identifiers

TIC

TIC 363444743

Gaia DR2

Gaia DR2 3817000078053804672

Gaia DR3

Gaia DR3 3817000078053804672

System

K2-50

Percentile among Rocky Terrestrial cohort

Radius 1.000 R⊕ · percentile 40 / cohort 570

Mass 0.972 M⊕ · percentile 36 / cohort 570

Orbital period 3.96 d · percentile 43 / cohort 567

Distance 257.44 pc · percentile 36 / cohort 566

ESI 0.993 · percentile 99 / cohort 570

Orbit & Habitability

Orbital Dynamics

Period

3.962 days

Semi-major axis

— AU

Eccentricity

—

Inclination

— °

Year Length

A year here lasts approximately 3.96 Earth days (1.1% of a terrestrial year).

Transit Fingerprint

Depth

0.049 %

Duration

2.160 h

Impact parameter b

0.400

Rp / R★

0.016800

Transit midpoint (BJD)

2,456,852.6552

Photometric dip

Transit produces a flux drop of 485 ppm lasting ≈ 2.16 h.

Extended Orbital Architecture

Planet / star radius ratio

0.016800

Semi-major axis / stellar radius

12.400

Impact parameter (b)

0.400

Transit mid-time (BJD)

2,456,852.6552

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.993

0 = alien, 1 = Earth-identical

Insufficient insolation data. Close-orbiting tidally-locked around a cool host.

Discovery Paper

Primary reference

Heller et al. 2019

Instrument

Kepler CCD Array

Publication

2019-07

Observation locale

Space

Discovery cohort

Planets confirmed in 2019 at K2 (12 shown).

EPIC 206032309 b · Rocky Terrestrial EPIC 206215704 b · Rocky Terrestrial EPIC 201754305 d · Rocky Terrestrial EPIC 201841433 b · Rocky Terrestrial EPIC 206317286 b · Rocky Terrestrial EPIC 201615463 c · Rocky Terrestrial EPIC 212499991 b · Super-Earth EPIC 220554210 c · Super-Earth EPIC 201497682 b · Rocky Terrestrial K2-133 e · Super-Earth EPIC 206024342 b · Super-Earth EPIC 206042996 b · Super-Earth

Host System: K2-50

Spectral Class

K-type orange

Effective Temperature

4,326 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

0.634 R☉

Stellar Mass

0.611 M☉

Metallicity [Fe/H]

-0.11

Extended Stellar Properties

Surface gravity (log g)

4.742 dex

Stellar density

2.552 g/cm³

Metallicity ratio

[M/H]

Distance

257.44 parsec

Light-years 839.67 ly

V-band magnitude

14.71 mag

Voyager-speed travel 14,807,505 yr

Multi-band Host Photometry — 12 bands

Astrometric Data

Parallax

3.856 mas

Total Proper Motion

25.710 mas/yr

PM Right Ascension

8.75 mas/yr

PM Declination

-24.18 mas/yr

Galactic Cartesian (pc)

x = -0.978 · y = 0.182 · z = 0.104

Equatorial (J2000)

RA 169.48365° · Dec 5.98829°

Galactic ℓ, b

252.271° · 59.322°

Ecliptic λ, β

167.985° · 1.347°

HTM-20 index

-1905948637