Key parameters at a glance

A radius of 0.80 Earth radii
A mass of 0.44 Earth masses
Surface gravity around 0.68 g
An orbital period of 2.444 days
Semi-major axis 0.0337 AU
Equilibrium temperature 1,249 K (976 °C)
Distance from Earth 1,775.78 light-years
Earth Similarity Index 0.238
Travel time at Voyager 1 speed 31,315,806 years

Kepler-1393 b Planet Profile

Physical Specs

Radius

0.80 R⊕

Radius (Jupiter)

0.071 R♃

Mass

0.44 M⊕

Mass (Jupiter)

0.001 M♃

Density

4.69 g/cm³

Surface Gravity

0.68 g (Earth)

Classification

Planet Type

Rocky Terrestrial

ESI Score 0.238

HZ Position Inner

Controversial No

Discovery

Year 2016

Method Transit

Facility Kepler

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#479of 570

top 83.9%

This planet

0.80R⊕

Rocky Terrestrial median

1.01R⊕

Nearest-size peers

Kepler-1076 b 0.80 R⊕ Kepler-1130 b 0.80 R⊕ Kepler-1581 b 0.80 R⊕

Metric	Earth	Kepler-1393 b	Jupiter
Radius (R⊕)	1.00	0.80	11.21
Mass (M⊕)	1.00	0.44	317.83
Density (g/cm³)	5.51	4.69	1.33
Surface Gravity (g)	1.00	0.68	2.53
Insolation (S⊕)	1.00	574.37	0.037

Star Catalogue Identifiers

TIC

TIC 120255638

Gaia DR2

Gaia DR2 2103399695656782208

Gaia DR3

Gaia DR3 2103399695656782208

System

Kepler-1393

Percentile among Rocky Terrestrial cohort

Radius 0.800 R⊕ · percentile 15 / cohort 570

Mass 0.437 M⊕ · percentile 13 / cohort 570

Orbital period 2.44 d · percentile 28 / cohort 567

Distance 544.46 pc · percentile 68 / cohort 566

ESI 0.238 · percentile 23 / cohort 570

Orbit & Habitability

Orbital Dynamics

Period

2.444 days

Semi-major axis

0.0337 AU

Eccentricity

0.000

Inclination

88.50 °

Year Length

A year here lasts approximately 2.44 Earth days (0.7% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0337 AU.

Transit Fingerprint

Depth

0.007 %

Duration

1.822 h

Impact parameter b

0.258

Rp / R★

0.007781

Transit midpoint (BJD)

2,454,965.8054

Photometric dip

Transit produces a flux drop of 67 ppm lasting ≈ 1.82 h.

Extended Orbital Architecture

Planet / star radius ratio

0.007781

Semi-major axis / stellar radius

9.830

Impact parameter (b)

0.258

Transit mid-time (BJD)

2,454,965.8054

Angular separation (arcsec)

0.06190

Eq. Temperature

1,249K

(976 °C)

Insolation (S⊕)

574.37

Earth = 1.00

Earth Similarity (ESI)

0.238

0 = alien, 1 = Earth-identical

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

Discovery Paper

Primary reference

Morton et al. 2016

Instrument

Kepler CCD Array

Publication

2016-05

Observation locale

Space

Discovery cohort

Planets confirmed in 2016 at Kepler (12 shown).

Kepler-1512 b · Rocky Terrestrial Kepler-1410 b · Super-Earth Kepler-560 b · Super-Earth Kepler-1389 b · Super-Earth Kepler-1450 b · Super-Earth Kepler-1544 b · Super-Earth Kepler-1459 b · Super-Earth Kepler-1638 b · Super-Earth Kepler-737 b · Super-Earth Kepler-1185 b · Super-Earth Kepler-1178 b · Rocky Terrestrial Kepler-1040 b · Sub-Neptune

Host System: Kepler-1393

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,697 K — cooler than the Sun (5,778 K)

Estimated Age

3.47 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.920 R☉

Stellar Mass

0.950 M☉

Metallicity [Fe/H]

-0.09

Extended Stellar Properties

Surface gravity (log g)

4.500 dex

Stellar density

2.003 g/cm³

Metallicity ratio

[Fe/H]

Distance

544.46 parsec

Light-years 1,775.78 ly

V-band magnitude

13.48 mag

Voyager-speed travel 31,315,806 yr

Multi-band Host Photometry — 17 bands

Astrometric Data

Parallax

1.568 mas

Total Proper Motion

18.046 mas/yr

PM Right Ascension

-0.34 mas/yr

PM Declination

-18.04 mas/yr

Galactic Cartesian (pc)

x = 0.191 · y = -0.740 · z = 0.645

Equatorial (J2000)

RA 284.45946° · Dec 40.14248°

Galactic ℓ, b

70.297° · 15.960°

Ecliptic λ, β

294.298° · 62.367°

HTM-20 index

-417198177