Key parameters at a glance

A radius of 1.27 Earth radii
A mass of 2.15 Earth masses
Surface gravity around 1.33 g
An orbital period of 5.622 days
Semi-major axis 0.0598 AU
Equilibrium temperature 992 K (719 °C)
Distance from Earth 1,935.87 light-years
Earth Similarity Index 0.313
Travel time at Voyager 1 speed 34,139,001 years

Kepler-831 b Planet Profile

Physical Specs

Radius

1.27 R⊕

Radius (Jupiter)

0.113 R♃

Mass

2.15 M⊕

Mass (Jupiter)

0.007 M♃

Density

5.77 g/cm³

Surface Gravity

1.33 g (Earth)

Classification

Planet Type

Super-Earth

ESI Score 0.313

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

#1135of 1176

top 96.4%

This planet

1.27R⊕

Super-Earth median

1.60R⊕

Nearest-size peers

Kepler-85 e 1.27 R⊕ Kepler-404 b 1.27 R⊕ Kepler-181 b 1.27 R⊕

Metric	Earth	Kepler-831 b	Jupiter
Radius (R⊕)	1.00	1.27	11.21
Mass (M⊕)	1.00	2.15	317.83
Density (g/cm³)	5.51	5.77	1.33
Surface Gravity (g)	1.00	1.33	2.53
Insolation (S⊕)	1.00	266.25	0.037

Star Catalogue Identifiers

TIC

TIC 271346561

Gaia DR2

Gaia DR2 2077954866292643840

Gaia DR3

Gaia DR3 2077954866292643840

System

Kepler-831

Percentile among Super-Earth cohort

Radius 1.270 R⊕ · percentile 3 / cohort 1176

Mass 2.150 M⊕ · percentile 4 / cohort 1176

Orbital period 5.62 d · percentile 44 / cohort 1164

Distance 593.54 pc · percentile 54 / cohort 1171

ESI 0.313 · percentile 40 / cohort 1176

Orbit & Habitability

Orbital Dynamics

Period

5.622 days

Semi-major axis

0.0598 AU

Eccentricity

0.000

Inclination

86.54 °

Year Length

A year here lasts approximately 5.62 Earth days (1.5% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0598 AU.

Transit Fingerprint

Depth

0.017 %

Duration

2.364 h

Impact parameter b

0.081

Rp / R★

0.011949

Transit midpoint (BJD)

2,454,969.8905

Photometric dip

Transit produces a flux drop of 172 ppm lasting ≈ 2.36 h.

Extended Orbital Architecture

Planet / star radius ratio

0.011949

Semi-major axis / stellar radius

18.335

Impact parameter (b)

0.081

Transit mid-time (BJD)

2,454,969.8905

Angular separation (arcsec)

0.10100

Eq. Temperature

992K

(719 °C)

Insolation (S⊕)

266.25

Earth = 1.00

Earth Similarity (ESI)

0.313

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-831

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,732 K — cooler than the Sun (5,778 K)

Estimated Age

4.17 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.970 R☉

Stellar Mass

0.990 M☉

Metallicity [Fe/H]

0.02

Extended Stellar Properties

Surface gravity (log g)

4.460 dex

Stellar density

0.910 g/cm³

Metallicity ratio

[Fe/H]

Distance

593.54 parsec

Light-years 1,935.87 ly

V-band magnitude

13.75 mag

Voyager-speed travel 34,139,001 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.656 mas

Total Proper Motion

20.159 mas/yr

PM Right Ascension

13.69 mas/yr

PM Declination

14.80 mas/yr

Galactic Cartesian (pc)

x = 0.310 · y = -0.666 · z = 0.679

Equatorial (J2000)

RA 294.98556° · Dec 42.72774°

Galactic ℓ, b

76.124° · 9.908°

Ecliptic λ, β

312.296° · 62.546°

HTM-20 index

-1576656076