Key parameters at a glance

A radius of 1.29 Earth radii
A mass of 2.21 Earth masses
Surface gravity around 1.33 g
An orbital period of 9.182 days
Semi-major axis 0.0910 AU
Equilibrium temperature 1,052 K (779 °C)
Distance from Earth 2,874.75 light-years
Earth Similarity Index 0.294
Travel time at Voyager 1 speed 50,696,249 years

1 sibling around Kepler-393

Kepler-393 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
Kepler-393 b this	Super-Earth	1.29	2.21	9.182	1,052	2014
Kepler-393 c	Super-Earth	1.33	2.33	14.614	901	2014

Kepler-393 b Planet Profile

Physical Specs

Radius

1.29 R⊕

Radius (Jupiter)

0.115 R♃

Mass

2.21 M⊕

Mass (Jupiter)

0.007 M♃

Density

5.66 g/cm³

Surface Gravity

1.33 g (Earth)

Classification

Planet Type

Super-Earth

ESI Score 0.294

HZ Position Inner

Controversial No

Discovery

Year 2014

Method Transit

Facility Kepler

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#1100of 1176

top 93.5%

This planet

1.29R⊕

Super-Earth median

1.60R⊕

Nearest-size peers

Kepler-211 c 1.29 R⊕ Kepler-312 b 1.29 R⊕ Kepler-173 b 1.29 R⊕

Metric	Earth	Kepler-393 b	Jupiter
Radius (R⊕)	1.00	1.29	11.21
Mass (M⊕)	1.00	2.21	317.83
Density (g/cm³)	5.51	5.66	1.33
Surface Gravity (g)	1.00	1.33	2.53
Insolation (S⊕)	1.00	429.81	0.037

Star Catalogue Identifiers

TIC

TIC 159580535

Gaia DR2

Gaia DR2 2127390970655877888

Gaia DR3

Gaia DR3 2127390970655877888

System

Kepler-393

Percentile among Super-Earth cohort

Radius 1.290 R⊕ · percentile 6 / cohort 1176

Mass 2.210 M⊕ · percentile 6 / cohort 1176

Orbital period 9.18 d · percentile 62 / cohort 1164

Distance 881.40 pc · percentile 74 / cohort 1171

ESI 0.294 · percentile 36 / cohort 1176

Orbit & Habitability

Orbital Dynamics

Period

9.182 days

Semi-major axis

0.0910 AU

Eccentricity

0.000

Inclination

89.07 °

Year Length

A year here lasts approximately 9.18 Earth days (2.5% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0910 AU.

Transit Fingerprint

Depth

0.008 %

Duration

4.343 h

Impact parameter b

0.630

Rp / R★

0.008635

Transit midpoint (BJD)

2,454,967.0481

Photometric dip

Transit produces a flux drop of 85 ppm lasting ≈ 4.34 h.

Extended Orbital Architecture

Planet / star radius ratio

0.008635

Semi-major axis / stellar radius

7.670

Impact parameter (b)

0.630

Transit mid-time (BJD)

2,454,967.0481

Angular separation (arcsec)

0.10300

Eq. Temperature

1,052K

(779 °C)

Insolation (S⊕)

429.81

Earth = 1.00

Earth Similarity (ESI)

0.294

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched.

Discovery Paper

Primary reference

Rowe et al. 2014

Instrument

Kepler CCD Array

Publication

2014-03

Observation locale

Space

Discovery cohort

Planets confirmed in 2014 at Kepler (12 shown).

Kepler-186 e · Super-Earth Kepler-395 c · Super-Earth Kepler-220 e · Super-Earth Kepler-249 d · Super-Earth Kepler-296 f · Super-Earth Kepler-367 c · Rocky Terrestrial Kepler-296 e · Super-Earth Kepler-155 c · Sub-Neptune Kepler-138 d · Super-Earth Kepler-333 c · Rocky Terrestrial Kepler-331 d · Super-Earth Kepler-267 d · Sub-Neptune

Host System: Kepler-393

Spectral Class

F-type yellow-white

Effective Temperature

6,189 K — hotter than the Sun (5,778 K)

Estimated Age

2.82 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.382 R☉

Stellar Mass

1.256 M☉

Metallicity [Fe/H]

0.03

Extended Stellar Properties

Surface gravity (log g)

4.233 dex

Stellar density

0.380 g/cm³

Metallicity ratio

[M/H]

Distance

881.40 parsec

Light-years 2,874.75 ly

V-band magnitude

13.26 mag

Voyager-speed travel 50,696,249 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.106 mas

Total Proper Motion

11.391 mas/yr

PM Right Ascension

-8.03 mas/yr

PM Declination

-8.08 mas/yr

Galactic Cartesian (pc)

x = 0.252 · y = -0.658 · z = 0.709

Equatorial (J2000)

RA 290.99521° · Dec 45.19219°

Galactic ℓ, b

77.068° · 13.577°

Ecliptic λ, β

308.147° · 65.874°

HTM-20 index

1596418470