Key parameters at a glance

A radius of 2.29 Earth radii
A mass of 5.86 Earth masses
Surface gravity around 1.12 g
An orbital period of 14.486 days
Semi-major axis 0.1091 AU
Equilibrium temperature 784 K (511 °C)
Distance from Earth 2,073.19 light-years
Earth Similarity Index 0.334
Travel time at Voyager 1 speed 36,560,665 years

Kepler-626 b Planet Profile

Physical Specs

Radius

2.29 R⊕

Radius (Jupiter)

0.204 R♃

Mass

5.86 M⊕

Mass (Jupiter)

0.018 M♃

Density

2.68 g/cm³

Surface Gravity

1.12 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.334

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

#1519of 1978

top 76.7%

This planet

2.29R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-319 d 2.29 R⊕ HD 35843 b 2.29 R⊕ Kepler-379 c 2.29 R⊕

Metric	Earth	Kepler-626 b	Jupiter
Radius (R⊕)	1.00	2.29	11.21
Mass (M⊕)	1.00	5.86	317.83
Density (g/cm³)	5.51	2.68	1.33
Surface Gravity (g)	1.00	1.12	2.53
Insolation (S⊕)	1.00	69.80	0.037

Star Catalogue Identifiers

TIC

TIC 121734202

Gaia DR2

Gaia DR2 2099728391973441920

Gaia DR3

Gaia DR3 2099728391973441920

System

Kepler-626

Percentile among Sub-Neptune cohort

Radius 2.290 R⊕ · percentile 23 / cohort 1978

Mass 5.860 M⊕ · percentile 22 / cohort 1978

Orbital period 14.49 d · percentile 49 / cohort 1946

Distance 635.64 pc · percentile 55 / cohort 1975

ESI 0.334 · percentile 36 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

14.486 days

Semi-major axis

0.1091 AU

Eccentricity

0.000

Inclination

86.48 °

Year Length

A year here lasts approximately 14.49 Earth days (4.0% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1091 AU.

Transit Fingerprint

Depth

0.046 %

Duration

2.714 h

Impact parameter b

0.015

Rp / R★

0.019745

Transit midpoint (BJD)

2,455,008.0056

Photometric dip

Transit produces a flux drop of 457 ppm lasting ≈ 2.71 h.

Extended Orbital Architecture

Planet / star radius ratio

0.019745

Semi-major axis / stellar radius

41.575

Impact parameter (b)

0.015

Transit mid-time (BJD)

2,455,008.0056

Angular separation (arcsec)

0.17200

Eq. Temperature

784K

(511 °C)

Insolation (S⊕)

69.80

Earth = 1.00

Earth Similarity (ESI)

0.334

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-626

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,813 K — hotter than the Sun (5,778 K)

Estimated Age

5.37 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

1.050 R☉

Stellar Mass

1.010 M☉

Metallicity [Fe/H]

0.01

Extended Stellar Properties

Surface gravity (log g)

4.400 dex

Stellar density

0.930 g/cm³

Metallicity ratio

[Fe/H]

Distance

635.64 parsec

Light-years 2,073.19 ly

V-band magnitude

14.09 mag

Voyager-speed travel 36,560,665 yr

Multi-band Host Photometry — 17 bands

Astrometric Data

Parallax

1.544 mas

Total Proper Motion

15.065 mas/yr

PM Right Ascension

2.38 mas/yr

PM Declination

-14.88 mas/yr

Galactic Cartesian (pc)

x = 0.247 · y = -0.729 · z = 0.639

Equatorial (J2000)

RA 288.69868° · Dec 39.70820°

Galactic ℓ, b

71.226° · 12.807°

Ecliptic λ, β

300.753° · 61.166°

HTM-20 index

-75535203