Key parameters at a glance

A radius of 1.36 Earth radii
A mass of 2.43 Earth masses
Surface gravity around 1.31 g
An orbital period of 2.850 days
Distance from Earth 600.55 light-years
Earth Similarity Index 0.927
Travel time at Voyager 1 speed 10,590,775 years

K2-200 b Planet Profile

Physical Specs

Radius

1.36 R⊕

Radius (Jupiter)

0.122 R♃

Mass

2.43 M⊕

Mass (Jupiter)

0.008 M♃

Density

5.26 g/cm³

Surface Gravity

1.31 g (Earth)

Classification

Planet Type

Super-Earth

ESI Score 0.927

HZ Position Unknown

Controversial No

Discovery

Year 2018

Method Transit

Facility K2

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#977of 1176

top 83.0%

This planet

1.36R⊕

Super-Earth median

1.60R⊕

Nearest-size peers

HD 25463 c 1.36 R⊕ TOI-411 b 1.36 R⊕ LP 890-9 c 1.37 R⊕

Metric	Earth	K2-200 b	Jupiter
Radius (R⊕)	1.00	1.36	11.21
Mass (M⊕)	1.00	2.43	317.83
Density (g/cm³)	5.51	5.26	1.33
Surface Gravity (g)	1.00	1.31	2.53
Insolation (S⊕)	1.00	—	0.037

Star Catalogue Identifiers

TIC

TIC 115072772

Gaia DR2

Gaia DR2 3635174042031610496

Gaia DR3

Gaia DR3 3635174042031610496

System

K2-200

Percentile among Super-Earth cohort

Radius 1.364 R⊕ · percentile 17 / cohort 1176

Mass 2.430 M⊕ · percentile 16 / cohort 1176

Orbital period 2.85 d · percentile 20 / cohort 1164

Distance 184.13 pc · percentile 23 / cohort 1171

ESI 0.927 · percentile 98 / cohort 1176

Orbit & Habitability

Orbital Dynamics

Period

2.850 days

Semi-major axis

— AU

Eccentricity

—

Inclination

87.97 °

Year Length

A year here lasts approximately 2.85 Earth days (0.8% of a terrestrial year).

Transit Fingerprint

Depth

0.027 %

Duration

1.342 h

Impact parameter b

0.132

Rp / R★

0.015799

Transit midpoint (BJD)

2,457,218.5609

Photometric dip

Transit produces a flux drop of 273 ppm lasting ≈ 1.34 h.

Extended Orbital Architecture

Planet / star radius ratio

0.015799

Semi-major axis / stellar radius

13.199

Impact parameter (b)

0.132

Transit mid-time (BJD)

2,457,218.5609

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.927

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Mayo et al. 2018

Instrument

Kepler CCD Array

Publication

2018-03

Observation locale

Space

Discovery cohort

Planets confirmed in 2018 at K2 (12 shown).

K2-190 c · Rocky Terrestrial K2-183 b · Rocky Terrestrial K2-209 b · Rocky Terrestrial K2-210 b · Rocky Terrestrial K2-165 b · Super-Earth K2-169 b · Super-Earth K2-148 b · Super-Earth K2-219 b · Super-Earth K2-190 b · Super-Earth K2-201 b · Super-Earth K2-170 b · Super-Earth K2-219 c · Super-Earth

Host System: K2-200

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,233 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

0.792 R☉

Stellar Mass

0.860 M☉

Metallicity [Fe/H]

-0.04

Extended Stellar Properties

Surface gravity (log g)

4.710 dex

Stellar density

2.232 g/cm³

Systemic radial velocity

-15.33 km/s

Metallicity ratio

[Fe/H]

Distance

184.13 parsec

Light-years 600.55 ly

V-band magnitude

12.43 mag

Voyager-speed travel 10,590,775 yr

Multi-band Host Photometry — 12 bands

Astrometric Data

Parallax

5.403 mas

Total Proper Motion

96.844 mas/yr

PM Right Ascension

-88.58 mas/yr

PM Declination

39.15 mas/yr

Galactic Cartesian (pc)

x = -0.923 · y = -0.377 · z = -0.080

Equatorial (J2000)

RA 202.25121° · Dec -4.61005°

Galactic ℓ, b

320.303° · 56.989°

Ecliptic λ, β

202.291° · 4.381°

HTM-20 index

-1294570992