Key parameters at a glance

A radius of 0.82 Earth radii
A mass of 0.48 Earth masses
Surface gravity around 0.71 g
An orbital period of 2.345 days
Semi-major axis 0.0350 AU
Equilibrium temperature 1,471 K (1198 °C)
Distance from Earth 1,283.89 light-years
Earth Similarity Index 0.198
Travel time at Voyager 1 speed 22,641,346 years

Kepler-1141 b Planet Profile

Physical Specs

Radius

0.82 R⊕

Radius (Jupiter)

0.073 R♃

Mass

0.48 M⊕

Mass (Jupiter)

0.002 M♃

Density

4.75 g/cm³

Surface Gravity

0.71 g (Earth)

Classification

Planet Type

Rocky Terrestrial

ESI Score 0.198

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

#465of 570

top 81.4%

This planet

0.82R⊕

Rocky Terrestrial median

1.01R⊕

Nearest-size peers

Kepler-32 f 0.82 R⊕ Kepler-106 b 0.82 R⊕ Kepler-390 b 0.82 R⊕

Metric	Earth	Kepler-1141 b	Jupiter
Radius (R⊕)	1.00	0.82	11.21
Mass (M⊕)	1.00	0.48	317.83
Density (g/cm³)	5.51	4.75	1.33
Surface Gravity (g)	1.00	0.71	2.53
Insolation (S⊕)	1.00	1,146.95	0.037

Star Catalogue Identifiers

TIC

TIC 159393734

Gaia DR2

Gaia DR2 2129369095153280000

Gaia DR3

Gaia DR3 2129369095153280000

System

Kepler-1141

Percentile among Rocky Terrestrial cohort

Radius 0.820 R⊕ · percentile 17 / cohort 570

Mass 0.477 M⊕ · percentile 15 / cohort 570

Orbital period 2.34 d · percentile 26 / cohort 567

Distance 393.64 pc · percentile 52 / cohort 566

ESI 0.198 · percentile 14 / cohort 570

Orbit & Habitability

Orbital Dynamics

Period

2.345 days

Semi-major axis

0.0350 AU

Eccentricity

0.000

Inclination

84.08 °

Year Length

A year here lasts approximately 2.34 Earth days (0.6% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0350 AU.

Transit Fingerprint

Depth

0.006 %

Duration

1.398 h

Impact parameter b

0.190

Rp / R★

0.007042

Transit midpoint (BJD)

2,454,965.8734

Photometric dip

Transit produces a flux drop of 59 ppm lasting ≈ 1.40 h.

Extended Orbital Architecture

Planet / star radius ratio

0.007042

Semi-major axis / stellar radius

7.780

Impact parameter (b)

0.190

Transit mid-time (BJD)

2,454,965.8734

Angular separation (arcsec)

0.08880

Eq. Temperature

1,471K

(1198 °C)

Insolation (S⊕)

1,146.95

Earth = 1.00

Earth Similarity (ESI)

0.198

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-1141

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,791 K — hotter than the Sun (5,778 K)

Estimated Age

6.17 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

1.070 R☉

Stellar Mass

1.010 M☉

Metallicity [Fe/H]

0.04

Extended Stellar Properties

Surface gravity (log g)

4.380 dex

Stellar density

0.720 g/cm³

Systemic radial velocity

-54.73 km/s

Metallicity ratio

[Fe/H]

Distance

393.64 parsec

Light-years 1,283.89 ly

V-band magnitude

12.40 mag

Voyager-speed travel 22,641,346 yr

Multi-band Host Photometry — 15 bands

Astrometric Data

Parallax

2.512 mas

Total Proper Motion

10.807 mas/yr

PM Right Ascension

9.10 mas/yr

PM Declination

5.83 mas/yr

Galactic Cartesian (pc)

x = 0.236 · y = -0.630 · z = 0.740

Equatorial (J2000)

RA 290.54368° · Dec 47.72591°

Galactic ℓ, b

79.312° · 14.913°

Ecliptic λ, β

309.770° · 68.347°

HTM-20 index

-328307295