Key parameters at a glance

A radius of 3.46 Earth radii
A mass of 11.80 Earth masses
Surface gravity around 0.99 g
An orbital period of 21.300 days
Semi-major axis 0.1516 AU
Equilibrium temperature 725 K (452 °C)
Distance from Earth 3,339.35 light-years
Earth Similarity Index 0.307
Travel time at Voyager 1 speed 58,889,402 years

Kepler-596 b Planet Profile

Physical Specs

Radius

3.46 R⊕

Radius (Jupiter)

0.309 R♃

Mass

11.80 M⊕

Mass (Jupiter)

0.037 M♃

Density

1.57 g/cm³

Surface Gravity

0.99 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.307

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

#193of 1978

top 9.7%

This planet

3.46R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

HD 24085 b 3.46 R⊕ TOI-1853 b 3.46 R⊕ HD 69830 c 3.46 R⊕

Metric	Earth	Kepler-596 b	Jupiter
Radius (R⊕)	1.00	3.46	11.21
Mass (M⊕)	1.00	11.80	317.83
Density (g/cm³)	5.51	1.57	1.33
Surface Gravity (g)	1.00	0.99	2.53
Insolation (S⊕)	1.00	82.30	0.037

Star Catalogue Identifiers

TIC

TIC 416267321

Gaia DR2

Gaia DR2 2133285383772329344

Gaia DR3

Gaia DR3 2133285383772329344

System

Kepler-596

Percentile among Sub-Neptune cohort

Radius 3.460 R⊕ · percentile 90 / cohort 1978

Mass 11.800 M⊕ · percentile 83 / cohort 1978

Orbital period 21.30 d · percentile 65 / cohort 1946

Distance 1,023.85 pc · percentile 79 / cohort 1975

ESI 0.307 · percentile 30 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

21.300 days

Semi-major axis

0.1516 AU

Eccentricity

0.000

Inclination

89.89 °

Year Length

A year here lasts approximately 21.30 Earth days (5.8% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1516 AU.

Transit Fingerprint

Depth

0.066 %

Duration

4.088 h

Impact parameter b

0.861

Rp / R★

0.023957

Transit midpoint (BJD)

2,455,022.7056

Photometric dip

Transit produces a flux drop of 660 ppm lasting ≈ 4.09 h.

Extended Orbital Architecture

Planet / star radius ratio

0.023957

Semi-major axis / stellar radius

40.659

Impact parameter (b)

0.861

Transit mid-time (BJD)

2,455,022.7056

Angular separation (arcsec)

0.14800

Eq. Temperature

725K

(452 °C)

Insolation (S⊕)

82.30

Earth = 1.00

Earth Similarity (ESI)

0.307

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-596

Spectral Class

F-type yellow-white

Effective Temperature

6,267 K — hotter than the Sun (5,778 K)

Estimated Age

2.69 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.320 R☉

Stellar Mass

1.210 M☉

Metallicity [Fe/H]

0.03

Extended Stellar Properties

Surface gravity (log g)

4.270 dex

Stellar density

0.490 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,023.85 parsec

Light-years 3,339.35 ly

V-band magnitude

14.13 mag

Voyager-speed travel 58,889,402 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.948 mas

Total Proper Motion

4.242 mas/yr

PM Right Ascension

-0.96 mas/yr

PM Declination

-4.13 mas/yr

Galactic Cartesian (pc)

x = 0.207 · y = -0.584 · z = 0.785

Equatorial (J2000)

RA 289.50068° · Dec 51.68571°

Galactic ℓ, b

82.820° · 17.095°

Ecliptic λ, β

312.721° · 72.240°

HTM-20 index

63211452