Key parameters at a glance

A radius of 1.04 Earth radii
A mass of 1.12 Earth masses
Surface gravity around 1.04 g
An orbital period of 4.170 days
Semi-major axis 0.0350 AU
Distance from Earth 1,423.63 light-years
Earth Similarity Index 0.991
Travel time at Voyager 1 speed 25,105,745 years
Almost certainly tidally locked to its host star given the close orbit

EPIC 201841433 b Planet Profile

Physical Specs

Radius

1.04 R⊕

Radius (Jupiter)

0.093 R♃

Mass

1.12 M⊕

Mass (Jupiter)

0.004 M♃

Density

5.47 g/cm³

Surface Gravity

1.04 g (Earth)

Classification

Planet Type

Rocky Terrestrial

ESI Score 0.991

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

#288of 570

top 50.4%

This planet

1.04R⊕

Rocky Terrestrial median

1.01R⊕

Nearest-size peers

GJ 1061 b 1.04 R⊕ Kepler-1409 b 1.04 R⊕ Kepler-1578 b 1.04 R⊕

Metric	Earth	EPIC 201841433 b	Jupiter
Radius (R⊕)	1.00	1.04	11.21
Mass (M⊕)	1.00	1.12	317.83
Density (g/cm³)	5.51	5.47	1.33
Surface Gravity (g)	1.00	1.04	2.53
Insolation (S⊕)	1.00	—	0.037

Star Catalogue Identifiers

TIC

TIC 380583651

Gaia DR2

Gaia DR2 3909373932553827072

Gaia DR3

Gaia DR3 3909373932553827072

System

EPIC 201841433

Percentile among Rocky Terrestrial cohort

Radius 1.040 R⊕ · percentile 48 / cohort 570

Mass 1.120 M⊕ · percentile 43 / cohort 570

Orbital period 4.17 d · percentile 46 / cohort 567

Distance 436.49 pc · percentile 57 / cohort 566

ESI 0.991 · percentile 99 / cohort 570

Orbit & Habitability

Orbital Dynamics

Period

4.170 days

Semi-major axis

0.0350 AU

Eccentricity

—

Inclination

89.00 °

Year Length

A year here lasts approximately 4.17 Earth days (1.1% of a terrestrial year) at a mean orbital distance of 0.0350 AU.

Transit Fingerprint

Depth

0.045 %

Duration

2.400 h

Impact parameter b

0.210

Rp / R★

0.015200

Transit midpoint (BJD)

2,456,811.6359

Photometric dip

Transit produces a flux drop of 447 ppm lasting ≈ 2.40 h.

Extended Orbital Architecture

Planet / star radius ratio

0.015200

Semi-major axis / stellar radius

11.500

Impact parameter (b)

0.210

Transit mid-time (BJD)

2,456,811.6359

Angular separation (arcsec)

0.08020

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.991

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 201833600 c · Rocky Terrestrial EPIC 206215704 b · Rocky Terrestrial EPIC 201754305 d · 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: EPIC 201841433

Spectral Class

K-type orange

Effective Temperature

5,053 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

0.628 R☉

Stellar Mass

0.802 M☉

Metallicity [Fe/H]

0.00

Extended Stellar Properties

Surface gravity (log g)

4.595 dex

Stellar density

2.652 g/cm³

Metallicity ratio

[Fe/H]

Distance

436.49 parsec

Light-years 1,423.63 ly

V-band magnitude

14.98 mag

Voyager-speed travel 25,105,745 yr

Multi-band Host Photometry — 12 bands

Astrometric Data

Parallax

2.263 mas

Total Proper Motion

7.947 mas/yr

PM Right Ascension

-3.96 mas/yr

PM Declination

-6.89 mas/yr

Galactic Cartesian (pc)

x = -0.991 · y = 0.083 · z = 0.107

Equatorial (J2000)

RA 175.20675° · Dec 6.13481°

Galactic ℓ, b

261.106° · 63.120°

Ecliptic λ, β

173.162° · 3.727°

HTM-20 index

1339426964