Key parameters at a glance

A radius of 0.91 Earth radii
A mass of 0.69 Earth masses
Surface gravity around 0.83 g
An orbital period of 2.048 days
Semi-major axis 0.0296 AU
Distance from Earth 1,883.88 light-years
Earth Similarity Index 0.959
Travel time at Voyager 1 speed 33,222,170 years
Almost certainly tidally locked to its host star given the close orbit

EPIC 201757695.02 Planet Profile

Physical Specs

Radius

0.91 R⊕

Radius (Jupiter)

0.081 R♃

Mass

0.69 M⊕

Mass (Jupiter)

0.002 M♃

Density

5.05 g/cm³

Surface Gravity

0.83 g (Earth)

Classification

Planet Type

Rocky Terrestrial

ESI Score 0.959

HZ Position Unknown

Controversial No

Discovery

Year 2020

Method Transit

Facility K2

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#412of 570

top 72.1%

This planet

0.91R⊕

Rocky Terrestrial median

1.01R⊕

Nearest-size peers

TOI-4527.01 0.91 R⊕ Kepler-1525 b 0.91 R⊕ Kepler-197 e 0.91 R⊕

Metric	Earth	EPIC 201757695.02	Jupiter
Radius (R⊕)	1.00	0.91	11.21
Mass (M⊕)	1.00	0.69	317.83
Density (g/cm³)	5.51	5.05	1.33
Surface Gravity (g)	1.00	0.83	2.53
Insolation (S⊕)	1.00	—	0.037

Star Catalogue Identifiers

TIC

TIC 380546118

System

EPIC 201757695

Percentile among Rocky Terrestrial cohort

Radius 0.908 R⊕ · percentile 28 / cohort 570

Mass 0.688 M⊕ · percentile 23 / cohort 570

Orbital period 2.05 d · percentile 23 / cohort 567

Distance 577.60 pc · percentile 71 / cohort 566

ESI 0.959 · percentile 96 / cohort 570

Orbit & Habitability

Orbital Dynamics

Period

2.048 days

Semi-major axis

0.0296 AU

Eccentricity

0.000

Inclination

89.28 °

Year Length

A year here lasts approximately 2.05 Earth days (0.6% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0296 AU.

Transit Fingerprint

Impact parameter b

0.120

Rp / R★

0.012700

Transit midpoint (BJD)

2,456,811.6370

Extended Orbital Architecture

Planet / star radius ratio

0.012700

Impact parameter (b)

0.120

Transit mid-time (BJD)

2,456,811.6370

Angular separation (arcsec)

0.05120

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.959

0 = alien, 1 = Earth-identical

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

Discovery Paper

Primary reference

Del Ser & Fors 2020

Instrument

Kepler CCD Array

Publication

2020-08

Observation locale

Space

Discovery cohort

Planets confirmed in 2020 at K2 (12 shown).

EPIC 201170410.02 · 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 K2-320 b · Sub-Neptune

Host System: EPIC 201757695

Spectral Class

K-type orange

Effective Temperature

4,520 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

0.655 R☉

Stellar Mass

0.727 M☉

Metallicity [Fe/H]

0.00

Distance

577.60 parsec

Light-years 1,883.88 ly

V-band magnitude

14.97 mag

Voyager-speed travel 33,222,170 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Total Proper Motion

6.764 mas/yr

PM Right Ascension

-3.17 mas/yr

PM Declination

-5.97 mas/yr

Galactic Cartesian (pc)

x = -0.991 · y = 0.105 · z = 0.080

Equatorial (J2000)

RA 173.93851° · Dec 4.61643°

Galactic ℓ, b

260.881° · 61.148°

Ecliptic λ, β

172.605° · 1.832°

HTM-20 index

-1886406501