Key parameters at a glance

A radius of 1.35 Earth radii
A mass of 2.39 Earth masses
Surface gravity around 1.31 g
An orbital period of 4.095 days
Semi-major axis 0.0511 AU
Equilibrium temperature 1,122 K (849 °C)
Distance from Earth 4,259.56 light-years
Earth Similarity Index 0.272
Travel time at Voyager 1 speed 75,117,420 years

Kepler-1631 b Planet Profile

Physical Specs

Radius

1.35 R⊕

Radius (Jupiter)

0.120 R♃

Mass

2.39 M⊕

Mass (Jupiter)

0.008 M♃

Density

5.34 g/cm³

Surface Gravity

1.31 g (Earth)

Classification

Planet Type

Super-Earth

ESI Score 0.272

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

#996of 1176

top 84.6%

This planet

1.35R⊕

Super-Earth median

1.60R⊕

Nearest-size peers

Kepler-446 d 1.35 R⊕ Kepler-1532 b 1.35 R⊕ Kepler-301 c 1.35 R⊕

Metric	Earth	Kepler-1631 b	Jupiter
Radius (R⊕)	1.00	1.35	11.21
Mass (M⊕)	1.00	2.39	317.83
Density (g/cm³)	5.51	5.34	1.33
Surface Gravity (g)	1.00	1.31	2.53
Insolation (S⊕)	1.00	446.92	0.037

Star Catalogue Identifiers

TIC

TIC 271159855

Gaia DR2

Gaia DR2 2078284547978727808

Gaia DR3

Gaia DR3 2078284547978727808

System

Kepler-1631

Percentile among Super-Earth cohort

Radius 1.350 R⊕ · percentile 14 / cohort 1176

Mass 2.390 M⊕ · percentile 14 / cohort 1176

Orbital period 4.10 d · percentile 32 / cohort 1164

Distance 1,305.99 pc · percentile 92 / cohort 1171

ESI 0.272 · percentile 30 / cohort 1176

Orbit & Habitability

Orbital Dynamics

Period

4.095 days

Semi-major axis

0.0511 AU

Eccentricity

0.000

Inclination

75.96 °

Year Length

A year here lasts approximately 4.10 Earth days (1.1% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0511 AU.

Transit Fingerprint

Depth

0.018 %

Duration

1.929 h

Impact parameter b

0.378

Rp / R★

0.013196

Transit midpoint (BJD)

2,454,964.6765

Photometric dip

Transit produces a flux drop of 182 ppm lasting ≈ 1.93 h.

Extended Orbital Architecture

Planet / star radius ratio

0.013196

Semi-major axis / stellar radius

4.000

Impact parameter (b)

0.378

Transit mid-time (BJD)

2,454,964.6765

Angular separation (arcsec)

0.03910

Eq. Temperature

1,122K

(849 °C)

Insolation (S⊕)

446.92

Earth = 1.00

Earth Similarity (ESI)

0.272

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-1631

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,679 K — cooler than the Sun (5,778 K)

Estimated Age

4.17 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.950 R☉

Stellar Mass

0.970 M☉

Metallicity [Fe/H]

0.04

Extended Stellar Properties

Surface gravity (log g)

4.470 dex

Stellar density

4.006 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,305.99 parsec

Light-years 4,259.56 ly

V-band magnitude

15.67 mag

Voyager-speed travel 75,117,420 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.738 mas

Total Proper Motion

2.941 mas/yr

PM Right Ascension

-1.78 mas/yr

PM Declination

-2.34 mas/yr

Galactic Cartesian (pc)

x = 0.301 · y = -0.656 · z = 0.692

Equatorial (J2000)

RA 294.63258° · Dec 43.80767°

Galactic ℓ, b

76.973° · 10.638°

Ecliptic λ, β

312.648° · 63.645°

HTM-20 index

-1279891180