Key parameters at a glance

A radius of 2.07 Earth radii
A mass of 4.94 Earth masses
Surface gravity around 1.15 g
An orbital period of 18.221 days
Semi-major axis 0.1406 AU
Equilibrium temperature 786 K (513 °C)
Distance from Earth 3,478.32 light-years
Earth Similarity Index 0.346
Travel time at Voyager 1 speed 61,340,228 years

Kepler-1396 b Planet Profile

Physical Specs

Radius

2.07 R⊕

Radius (Jupiter)

0.185 R♃

Mass

4.94 M⊕

Mass (Jupiter)

0.016 M♃

Density

3.06 g/cm³

Surface Gravity

1.15 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.346

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

#1860of 1978

top 94.0%

This planet

2.07R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

TOI-262 b 2.07 R⊕ Kepler-654 b 2.07 R⊕ Kepler-988 b 2.07 R⊕

Metric	Earth	Kepler-1396 b	Jupiter
Radius (R⊕)	1.00	2.07	11.21
Mass (M⊕)	1.00	4.94	317.83
Density (g/cm³)	5.51	3.06	1.33
Surface Gravity (g)	1.00	1.15	2.53
Insolation (S⊕)	1.00	71.82	0.037

Star Catalogue Identifiers

TIC

TIC 270954695

Gaia DR2

Gaia DR2 2079897050500386944

Gaia DR3

Gaia DR3 2079897050500386944

System

Kepler-1396

Percentile among Sub-Neptune cohort

Radius 2.070 R⊕ · percentile 6 / cohort 1978

Mass 4.940 M⊕ · percentile 7 / cohort 1978

Orbital period 18.22 d · percentile 59 / cohort 1946

Distance 1,066.46 pc · percentile 82 / cohort 1975

ESI 0.346 · percentile 40 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

18.221 days

Semi-major axis

0.1406 AU

Eccentricity

0.000

Inclination

89.74 °

Year Length

A year here lasts approximately 18.22 Earth days (5.0% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1406 AU.

Transit Fingerprint

Depth

0.020 %

Duration

5.313 h

Impact parameter b

0.125

Rp / R★

0.014656

Transit midpoint (BJD)

2,454,974.3743

Photometric dip

Transit produces a flux drop of 202 ppm lasting ≈ 5.31 h.

Extended Orbital Architecture

Planet / star radius ratio

0.014656

Semi-major axis / stellar radius

27.390

Impact parameter (b)

0.125

Transit mid-time (BJD)

2,454,974.3743

Angular separation (arcsec)

0.13200

Eq. Temperature

786K

(513 °C)

Insolation (S⊕)

71.82

Earth = 1.00

Earth Similarity (ESI)

0.346

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water.

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-1396

Spectral Class

F-type yellow-white

Effective Temperature

6,195 K — hotter than the Sun (5,778 K)

Estimated Age

2.75 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.270 R☉

Stellar Mass

1.180 M☉

Metallicity [Fe/H]

0.04

Extended Stellar Properties

Surface gravity (log g)

4.300 dex

Stellar density

1.171 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,066.46 parsec

Light-years 3,478.32 ly

V-band magnitude

14.69 mag

Voyager-speed travel 61,340,228 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.909 mas

Total Proper Motion

16.799 mas/yr

PM Right Ascension

-5.97 mas/yr

PM Declination

-15.70 mas/yr

Galactic Cartesian (pc)

x = 0.292 · y = -0.645 · z = 0.706

Equatorial (J2000)

RA 294.33639° · Dec 44.91823°

Galactic ℓ, b

77.879° · 11.337°

Ecliptic λ, β

313.165° · 64.753°

HTM-20 index

-1700004662