Key parameters at a glance

A radius of 2.82 Earth radii
A mass of 8.35 Earth masses
Surface gravity around 1.05 g
An orbital period of 28.506 days
Semi-major axis 0.1793 AU
Equilibrium temperature 555 K (282 °C)
Distance from Earth 6,259.55 light-years
Earth Similarity Index 0.431
Travel time at Voyager 1 speed 110,387,217 years

Kepler-1183 b Planet Profile

Physical Specs

Radius

2.82 R⊕

Radius (Jupiter)

0.252 R♃

Mass

8.35 M⊕

Mass (Jupiter)

0.026 M♃

Density

2.05 g/cm³

Surface Gravity

1.05 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.431

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

#720of 1978

top 36.3%

This planet

2.82R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-281 b 2.82 R⊕ Kepler-198 b 2.82 R⊕ Kepler-722 c 2.82 R⊕

Metric	Earth	Kepler-1183 b	Jupiter
Radius (R⊕)	1.00	2.82	11.21
Mass (M⊕)	1.00	8.35	317.83
Density (g/cm³)	5.51	2.05	1.33
Surface Gravity (g)	1.00	1.05	2.53
Insolation (S⊕)	1.00	61.66	0.037

Star Catalogue Identifiers

TIC

TIC 137550938

Gaia DR2

Gaia DR2 2052721692908731904

Gaia DR3

Gaia DR3 2052721692908731904

System

Kepler-1183

Percentile among Sub-Neptune cohort

Radius 2.820 R⊕ · percentile 63 / cohort 1978

Mass 8.350 M⊕ · percentile 58 / cohort 1978

Orbital period 28.51 d · percentile 72 / cohort 1946

Distance 1,919.19 pc · percentile 97 / cohort 1975

ESI 0.431 · percentile 59 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

28.506 days

Semi-major axis

0.1793 AU

Eccentricity

0.000

Inclination

88.47 °

Year Length

A year here lasts approximately 28.51 Earth days (7.8% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1793 AU.

Transit Fingerprint

Depth

0.076 %

Duration

6.252 h

Impact parameter b

0.827

Rp / R★

0.025566

Transit midpoint (BJD)

2,454,965.9202

Photometric dip

Transit produces a flux drop of 756 ppm lasting ≈ 6.25 h.

Extended Orbital Architecture

Planet / star radius ratio

0.025566

Semi-major axis / stellar radius

35.490

Impact parameter (b)

0.827

Transit mid-time (BJD)

2,454,965.9202

Angular separation (arcsec)

0.09340

Eq. Temperature

555K

(282 °C)

Insolation (S⊕)

61.66

Earth = 1.00

Earth Similarity (ESI)

0.431

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-1183

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,765 K — cooler than the Sun (5,778 K)

Estimated Age

4.27 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.990 R☉

Stellar Mass

1.000 M☉

Metallicity [Fe/H]

0.04

Extended Stellar Properties

Surface gravity (log g)

4.450 dex

Stellar density

1.041 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,919.19 parsec

Light-years 6,259.55 ly

V-band magnitude

15.97 mag

Voyager-speed travel 110,387,217 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.495 mas

Total Proper Motion

3.127 mas/yr

PM Right Ascension

1.78 mas/yr

PM Declination

-2.57 mas/yr

Galactic Cartesian (pc)

x = 0.294 · y = -0.720 · z = 0.628

Equatorial (J2000)

RA 292.23242° · Dec 38.89219°

Galactic ℓ, b

71.693° · 9.990°

Ecliptic λ, β

305.601° · 59.613°

HTM-20 index

2021793366