Key parameters at a glance

A radius of 0.64 Earth radii
A mass of 0.20 Earth masses
Surface gravity around 0.48 g
An orbital period of 2.005 days
Semi-major axis 0.0294 AU
Equilibrium temperature 1,216 K (943 °C)
Distance from Earth 1,680.79 light-years
Earth Similarity Index 0.229
Travel time at Voyager 1 speed 29,640,779 years

1 sibling around Kepler-1371

Kepler-1371 c 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-1371 c this	Rocky Terrestrial	0.64	0.20	2.005	1,216	2016
Kepler-1371 b	Rocky Terrestrial	0.73	0.32	3.446	1,015	2016

Kepler-1371 c Planet Profile

Physical Specs

Radius

0.64 R⊕

Radius (Jupiter)

0.057 R♃

Mass

0.20 M⊕

Mass (Jupiter)

0.001 M♃

Density

4.11 g/cm³

Surface Gravity

0.48 g (Earth)

Classification

Planet Type

Rocky Terrestrial

ESI Score 0.229

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

#542of 570

top 94.9%

This planet

0.64R⊕

Rocky Terrestrial median

1.01R⊕

Nearest-size peers

Kepler-138 b 0.64 R⊕ K2-137 b 0.64 R⊕ Barnard e 0.64 R⊕

Metric	Earth	Kepler-1371 c	Jupiter
Radius (R⊕)	1.00	0.64	11.21
Mass (M⊕)	1.00	0.20	317.83
Density (g/cm³)	5.51	4.11	1.33
Surface Gravity (g)	1.00	0.48	2.53
Insolation (S⊕)	1.00	853.27	0.037

Star Catalogue Identifiers

TIC

TIC 158840095

Gaia DR2

Gaia DR2 2130911435088877056

Gaia DR3

Gaia DR3 2130911435088877056

System

Kepler-1371

Percentile among Rocky Terrestrial cohort

Radius 0.640 R⊕ · percentile 5 / cohort 570

Mass 0.196 M⊕ · percentile 3 / cohort 570

Orbital period 2.01 d · percentile 22 / cohort 567

Distance 515.33 pc · percentile 65 / cohort 566

ESI 0.229 · percentile 19 / cohort 570

Orbit & Habitability

Orbital Dynamics

Period

2.005 days

Semi-major axis

0.0294 AU

Eccentricity

0.000

Inclination

77.66 °

Year Length

A year here lasts approximately 2.01 Earth days (0.5% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0294 AU.

Transit Fingerprint

Depth

0.006 %

Duration

1.798 h

Impact parameter b

0.197

Rp / R★

0.006761

Transit midpoint (BJD)

2,454,966.2455

Photometric dip

Transit produces a flux drop of 60 ppm lasting ≈ 1.80 h.

Extended Orbital Architecture

Planet / star radius ratio

0.006761

Semi-major axis / stellar radius

8.430

Impact parameter (b)

0.197

Transit mid-time (BJD)

2,454,966.2455

Angular separation (arcsec)

0.05700

Eq. Temperature

1,216K

(943 °C)

Insolation (S⊕)

853.27

Earth = 1.00

Earth Similarity (ESI)

0.229

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-1371

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,361 K — cooler than the Sun (5,778 K)

Estimated Age

4.37 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.830 R☉

Stellar Mass

0.870 M☉

Metallicity [Fe/H]

-0.07

Extended Stellar Properties

Surface gravity (log g)

4.550 dex

Stellar density

1.020 g/cm³

Metallicity ratio

[Fe/H]

Distance

515.33 parsec

Light-years 1,680.79 ly

V-band magnitude

14.02 mag

Voyager-speed travel 29,640,779 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.912 mas

Total Proper Motion

6.562 mas/yr

PM Right Ascension

4.46 mas/yr

PM Declination

-4.81 mas/yr

Galactic Cartesian (pc)

x = 0.218 · y = -0.639 · z = 0.738

Equatorial (J2000)

RA 288.83143° · Dec 47.55198°

Galactic ℓ, b

78.668° · 15.901°

Ecliptic λ, β

306.669° · 68.607°

HTM-20 index

1623148721