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 2.255 days
Distance from Earth 358.41 light-years
Earth Similarity Index 0.993
Travel time at Voyager 1 speed 6,320,495 years
Almost certainly tidally locked to its host star given the close orbit

EPIC 206215704 b 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 206215704 b	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 38355468

Gaia DR2

Gaia DR2 2615281560211505408

Gaia DR3

Gaia DR3 2615281560211505408

System

EPIC 206215704

Percentile among Rocky Terrestrial cohort

Radius 1.000 R⊕ · percentile 40 / cohort 570

Mass 0.972 M⊕ · percentile 36 / cohort 570

Orbital period 2.26 d · percentile 25 / cohort 567

Distance 109.89 pc · percentile 24 / cohort 566

ESI 0.993 · percentile 99 / cohort 570

Orbit & Habitability

Orbital Dynamics

Period

2.255 days

Semi-major axis

— AU

Eccentricity

—

Inclination

89.90 °

Year Length

A year here lasts approximately 2.26 Earth days (0.6% of a terrestrial year).

Transit Fingerprint

Depth

0.269 %

Duration

0.984 h

Impact parameter b

0.280

Rp / R★

0.038300

Transit midpoint (BJD)

2,457,010.0072

Photometric dip

Transit produces a flux drop of 2,690 ppm lasting ≈ 0.98 h.

Extended Orbital Architecture

Planet / star radius ratio

0.038300

Semi-major axis / stellar radius

17.000

Impact parameter (b)

0.280

Transit mid-time (BJD)

2,457,010.0072

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 201833600 c · 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: EPIC 206215704

Spectral Class

M-type red dwarf

Effective Temperature

3,297 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

0.250 R☉

Stellar Mass

0.407 M☉

Metallicity [Fe/H]

-0.33

Extended Stellar Properties

Surface gravity (log g)

4.900 dex

Stellar density

19.880 g/cm³

Metallicity ratio

[Fe/H]

Distance

109.89 parsec

Light-years 358.41 ly

V-band magnitude

17.83 mag

Voyager-speed travel 6,320,495 yr

Multi-band Host Photometry — 17 bands

Astrometric Data

Parallax

9.073 mas

Total Proper Motion

45.951 mas/yr

PM Right Ascension

16.11 mas/yr

PM Declination

-43.03 mas/yr

Galactic Cartesian (pc)

x = 0.895 · y = -0.415 · z = -0.165

Equatorial (J2000)

RA 335.09497° · Dec -9.50971°

Galactic ℓ, b

51.975° · -50.285°

Ecliptic λ, β

333.457° · 0.781°

HTM-20 index

365404546