Key parameters at a glance

A radius of 0.96 Earth radii
A mass of 0.84 Earth masses
Surface gravity around 0.91 g
An orbital period of 1.583 days
Distance from Earth 1,025.27 light-years
Earth Similarity Index 0.979
Travel time at Voyager 1 speed 18,080,660 years
Almost certainly tidally locked to its host star given the close orbit

1 sibling around EPIC 206317286

EPIC 206317286 b 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 206317286 b this	Rocky Terrestrial	0.96	0.84	1.583	—	2019
EPIC 206317286 c	Sub-Neptune	2.09	5.03	17.515	—	2022

EPIC 206317286 b Planet Profile

Physical Specs

Radius

0.96 R⊕

Radius (Jupiter)

0.086 R♃

Mass

0.84 M⊕

Mass (Jupiter)

0.003 M♃

Density

5.22 g/cm³

Surface Gravity

0.91 g (Earth)

Classification

Planet Type

Rocky Terrestrial

ESI Score 0.979

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

#366of 570

top 64.0%

This planet

0.96R⊕

Rocky Terrestrial median

1.01R⊕

Nearest-size peers

Kepler-1445 b 0.96 R⊕ Kepler-399 b 0.96 R⊕ Kepler-524 c 0.96 R⊕

Metric	Earth	EPIC 206317286 b	Jupiter
Radius (R⊕)	1.00	0.96	11.21
Mass (M⊕)	1.00	0.84	317.83
Density (g/cm³)	5.51	5.22	1.33
Surface Gravity (g)	1.00	0.91	2.53
Insolation (S⊕)	1.00	—	0.037

Star Catalogue Identifiers

TIC

TIC 250956593

Gaia DR2

Gaia DR2 2621545958991110144

Gaia DR3

Gaia DR3 2621545958991110144

System

EPIC 206317286

Percentile among Rocky Terrestrial cohort

Radius 0.960 R⊕ · percentile 35 / cohort 570

Mass 0.840 M⊕ · percentile 31 / cohort 570

Orbital period 1.58 d · percentile 18 / cohort 567

Distance 314.35 pc · percentile 42 / cohort 566

ESI 0.979 · percentile 97 / cohort 570

Orbit & Habitability

Orbital Dynamics

Period

1.583 days

Semi-major axis

— AU

Eccentricity

—

Inclination

— °

Year Length

A year here lasts approximately 1.58 Earth days (0.4% of a terrestrial year).

Transit Fingerprint

Depth

0.030 %

Duration

1.752 h

Impact parameter b

0.570

Rp / R★

0.013300

Transit midpoint (BJD)

2,457,011.3327

Photometric dip

Transit produces a flux drop of 300 ppm lasting ≈ 1.75 h.

Extended Orbital Architecture

Planet / star radius ratio

0.013300

Semi-major axis / stellar radius

6.100

Impact parameter (b)

0.570

Transit mid-time (BJD)

2,457,011.3327

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.979

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 201841433 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 206317286

Spectral Class

K-type orange

Effective Temperature

4,752 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

0.669 R☉

Stellar Mass

0.711 M☉

Metallicity [Fe/H]

0.02

Extended Stellar Properties

Surface gravity (log g)

4.596 dex

Stellar density

2.520 g/cm³

Metallicity ratio

[Fe/H]

Distance

314.35 parsec

Light-years 1,025.27 ly

V-band magnitude

14.01 mag

Voyager-speed travel 18,080,660 yr

Multi-band Host Photometry — 17 bands

Astrometric Data

Parallax

3.153 mas

Total Proper Motion

58.425 mas/yr

PM Right Ascension

57.10 mas/yr

PM Declination

-12.39 mas/yr

Galactic Cartesian (pc)

x = 0.916 · y = -0.377 · z = -0.139

Equatorial (J2000)

RA 337.61784° · Dec -7.97246°

Galactic ℓ, b

56.170° · -51.545°

Ecliptic λ, β

336.339° · 1.304°

HTM-20 index

-1225197842