Key parameters at a glance

A radius of 0.69 Earth radii
A mass of 0.26 Earth masses
Surface gravity around 0.54 g
An orbital period of 3.108 days
Semi-major axis 0.0390 AU
Equilibrium temperature 968 K (695 °C)
Distance from Earth 982.33 light-years
Earth Similarity Index 0.301
Travel time at Voyager 1 speed 17,323,326 years
Almost certainly tidally locked to its host star given the close orbit

1 sibling around Kepler-141

Kepler-141 b shares its host star with 1 other confirmed planet. Side-by-side measurements below.

Planet	Type	Radius (R⊕)	Mass (M⊕)	Period (d)	Eq. T (K)	Year
Kepler-141 b this	Rocky Terrestrial	0.69	0.26	3.108	968	2014
Kepler-141 c	Super-Earth	1.41	2.57	7.011	738	2014

Kepler-141 b Planet Profile

Physical Specs

Radius

0.69 R⊕

Radius (Jupiter)

0.062 R♃

Mass

0.26 M⊕

Mass (Jupiter)

0.001 M♃

Density

4.30 g/cm³

Surface Gravity

0.54 g (Earth)

Classification

Planet Type

Rocky Terrestrial

ESI Score 0.301

HZ Position Inner

Controversial No

Discovery

Year 2014

Method Transit

Facility Kepler

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#533of 570

top 93.3%

This planet

0.69R⊕

Rocky Terrestrial median

1.01R⊕

Nearest-size peers

K2-116 b 0.69 R⊕ Proxima Cen d 0.69 R⊕ EPIC 201497682 b 0.69 R⊕

Metric	Earth	Kepler-141 b	Jupiter
Radius (R⊕)	1.00	0.69	11.21
Mass (M⊕)	1.00	0.26	317.83
Density (g/cm³)	5.51	4.30	1.33
Surface Gravity (g)	1.00	0.54	2.53
Insolation (S⊕)	1.00	228.66	0.037

Star Catalogue Identifiers

TIC

TIC 273681580

Gaia DR2

Gaia DR2 2086455740440489472

Gaia DR3

Gaia DR3 2086455740440489472

System

Kepler-141

Percentile among Rocky Terrestrial cohort

Radius 0.690 R⊕ · percentile 6 / cohort 570

Mass 0.257 M⊕ · percentile 5 / cohort 570

Orbital period 3.11 d · percentile 34 / cohort 567

Distance 301.18 pc · percentile 42 / cohort 566

ESI 0.301 · percentile 38 / cohort 570

Orbit & Habitability

Orbital Dynamics

Period

3.108 days

Semi-major axis

0.0390 AU

Eccentricity

0.000

Inclination

84.53 °

Year Length

A year here lasts approximately 3.11 Earth days (0.9% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0390 AU.

Transit Fingerprint

Depth

0.008 %

Duration

2.218 h

Impact parameter b

0.540

Rp / R★

0.007814

Transit midpoint (BJD)

2,454,965.6306

Photometric dip

Transit produces a flux drop of 77 ppm lasting ≈ 2.22 h.

Extended Orbital Architecture

Planet / star radius ratio

0.007814

Semi-major axis / stellar radius

7.800

Impact parameter (b)

0.540

Transit mid-time (BJD)

2,454,965.6306

Angular separation (arcsec)

0.12900

Eq. Temperature

968K

(695 °C)

Insolation (S⊕)

228.66

Earth = 1.00

Earth Similarity (ESI)

0.301

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water. Close-orbiting tidally-locked around a cool host.

Discovery Paper

Primary reference

Rowe et al. 2014

Instrument

Kepler CCD Array

Publication

2014-03

Observation locale

Space

Discovery cohort

Planets confirmed in 2014 at Kepler (12 shown).

Kepler-186 e · Super-Earth Kepler-395 c · Super-Earth Kepler-220 e · Super-Earth Kepler-249 d · Super-Earth Kepler-296 f · Super-Earth Kepler-367 c · Rocky Terrestrial Kepler-296 e · Super-Earth Kepler-155 c · Sub-Neptune Kepler-138 d · Super-Earth Kepler-333 c · Rocky Terrestrial Kepler-331 d · Super-Earth Kepler-267 d · Sub-Neptune

Host System: Kepler-141

Spectral Class

K-type orange

Effective Temperature

4,910 K — cooler than the Sun (5,778 K)

Estimated Age

12.39 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

0.787 R☉

Stellar Mass

0.878 M☉

Metallicity [Fe/H]

0.26

Extended Stellar Properties

Surface gravity (log g)

4.566 dex

Stellar density

1.800 g/cm³

Systemic radial velocity

-20.11 km/s

Metallicity ratio

[M/H]

Distance

301.18 parsec

Light-years 982.33 ly

V-band magnitude

13.62 mag

Voyager-speed travel 17,323,326 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

3.291 mas

Total Proper Motion

25.559 mas/yr

PM Right Ascension

-20.12 mas/yr

PM Declination

-15.76 mas/yr

Galactic Cartesian (pc)

x = 0.315 · y = -0.594 · z = 0.740

Equatorial (J2000)

RA 297.97073° · Dec 47.73160°

Galactic ℓ, b

81.609° · 10.450°

Ecliptic λ, β

321.526° · 66.239°

HTM-20 index

1205525749