Key parameters at a glance

A radius of 1.51 Earth radii
A mass of 2.89 Earth masses
Surface gravity around 1.27 g
An orbital period of 5.600 days
Semi-major axis 0.0587 AU
Equilibrium temperature 952 K (679 °C)
Distance from Earth 3,116.54 light-years
Earth Similarity Index 0.314
Travel time at Voyager 1 speed 54,960,144 years

Kepler-1191 b Planet Profile

Physical Specs

Radius

1.51 R⊕

Radius (Jupiter)

0.135 R♃

Mass

2.89 M⊕

Mass (Jupiter)

0.009 M♃

Density

4.61 g/cm³

Surface Gravity

1.27 g (Earth)

Classification

Planet Type

Super-Earth

ESI Score 0.314

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

#730of 1176

top 62.0%

This planet

1.51R⊕

Super-Earth median

1.60R⊕

Nearest-size peers

Kepler-249 c 1.51 R⊕ Kepler-205 b 1.51 R⊕ Kepler-389 b 1.51 R⊕

Metric	Earth	Kepler-1191 b	Jupiter
Radius (R⊕)	1.00	1.51	11.21
Mass (M⊕)	1.00	2.89	317.83
Density (g/cm³)	5.51	4.61	1.33
Surface Gravity (g)	1.00	1.27	2.53
Insolation (S⊕)	1.00	167.18	0.037

Star Catalogue Identifiers

TIC

TIC 26538999

Gaia DR2

Gaia DR2 2129250313538148736

Gaia DR3

Gaia DR3 2129250313538148736

System

Kepler-1191

Percentile among Super-Earth cohort

Radius 1.510 R⊕ · percentile 37 / cohort 1176

Mass 2.890 M⊕ · percentile 34 / cohort 1176

Orbital period 5.60 d · percentile 43 / cohort 1164

Distance 955.54 pc · percentile 78 / cohort 1171

ESI 0.314 · percentile 40 / cohort 1176

Orbit & Habitability

Orbital Dynamics

Period

5.600 days

Semi-major axis

0.0587 AU

Eccentricity

0.000

Inclination

89.84 °

Year Length

A year here lasts approximately 5.60 Earth days (1.5% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0587 AU.

Transit Fingerprint

Depth

0.033 %

Duration

2.802 h

Impact parameter b

0.016

Rp / R★

0.017034

Transit midpoint (BJD)

2,454,968.9616

Photometric dip

Transit produces a flux drop of 329 ppm lasting ≈ 2.80 h.

Extended Orbital Architecture

Planet / star radius ratio

0.017034

Semi-major axis / stellar radius

16.395

Impact parameter (b)

0.016

Transit mid-time (BJD)

2,454,968.9616

Angular separation (arcsec)

0.06140

Eq. Temperature

952K

(679 °C)

Insolation (S⊕)

167.18

Earth = 1.00

Earth Similarity (ESI)

0.314

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-1191

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,308 K — cooler than the Sun (5,778 K)

Estimated Age

4.57 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.810 R☉

Stellar Mass

0.850 M☉

Metallicity [Fe/H]

-0.08

Extended Stellar Properties

Surface gravity (log g)

4.560 dex

Stellar density

2.263 g/cm³

Metallicity ratio

[Fe/H]

Distance

955.54 parsec

Light-years 3,116.54 ly

V-band magnitude

15.32 mag

Voyager-speed travel 54,960,144 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.018 mas

Total Proper Motion

9.788 mas/yr

PM Right Ascension

6.34 mas/yr

PM Declination

-7.45 mas/yr

Galactic Cartesian (pc)

x = 0.247 · y = -0.622 · z = 0.743

Equatorial (J2000)

RA 291.65779° · Dec 48.00926°

Galactic ℓ, b

79.898° · 14.350°

Ecliptic λ, β

311.933° · 68.318°

HTM-20 index

-210877163