Key parameters at a glance

A radius of 2.02 Earth radii
A mass of 4.74 Earth masses
Surface gravity around 1.16 g
An orbital period of 4.140 days
Semi-major axis 0.0537 AU
Equilibrium temperature 1,352 K (1079 °C)
Distance from Earth 4,464.52 light-years
Earth Similarity Index 0.193
Travel time at Voyager 1 speed 78,731,827 years

Kepler-1626 b Planet Profile

Physical Specs

Radius

2.02 R⊕

Radius (Jupiter)

0.180 R♃

Mass

4.74 M⊕

Mass (Jupiter)

0.015 M♃

Density

3.16 g/cm³

Surface Gravity

1.16 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.193

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

#1927of 1978

top 97.4%

This planet

2.02R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

DMPP-1 d 2.02 R⊕ Kepler-343 c 2.02 R⊕ Kepler-833 b 2.02 R⊕

Metric	Earth	Kepler-1626 b	Jupiter
Radius (R⊕)	1.00	2.02	11.21
Mass (M⊕)	1.00	4.74	317.83
Density (g/cm³)	5.51	3.16	1.33
Surface Gravity (g)	1.00	1.16	2.53
Insolation (S⊕)	1.00	1,328.65	0.037

Star Catalogue Identifiers

TIC

TIC 184559893

Gaia DR2

Gaia DR2 2076748083562850560

Gaia DR3

Gaia DR3 2076748083562850560

System

Kepler-1626

Percentile among Sub-Neptune cohort

Radius 2.020 R⊕ · percentile 2 / cohort 1978

Mass 4.740 M⊕ · percentile 4 / cohort 1978

Orbital period 4.14 d · percentile 9 / cohort 1946

Distance 1,368.83 pc · percentile 91 / cohort 1975

ESI 0.193 · percentile 6 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

4.140 days

Semi-major axis

0.0537 AU

Eccentricity

0.000

Inclination

87.83 °

Year Length

A year here lasts approximately 4.14 Earth days (1.1% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0537 AU.

Transit Fingerprint

Depth

0.011 %

Duration

3.284 h

Impact parameter b

0.144

Rp / R★

0.009738

Transit midpoint (BJD)

2,454,967.0417

Photometric dip

Transit produces a flux drop of 111 ppm lasting ≈ 3.28 h.

Extended Orbital Architecture

Planet / star radius ratio

0.009738

Semi-major axis / stellar radius

9.640

Impact parameter (b)

0.144

Transit mid-time (BJD)

2,454,967.0417

Angular separation (arcsec)

0.03920

Eq. Temperature

1,352K

(1079 °C)

Insolation (S⊕)

1,328.65

Earth = 1.00

Earth Similarity (ESI)

0.193

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-1626

Spectral Class

F-type yellow-white

Effective Temperature

6,826 K — hotter than the Sun (5,778 K)

Estimated Age

1.55 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.850 R☉

Stellar Mass

1.510 M☉

Metallicity [Fe/H]

0.04

Extended Stellar Properties

Surface gravity (log g)

4.080 dex

Stellar density

0.989 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,368.83 parsec

Light-years 4,464.52 ly

V-band magnitude

14.36 mag

Voyager-speed travel 78,731,827 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.702 mas

Total Proper Motion

6.168 mas/yr

PM Right Ascension

-2.44 mas/yr

PM Declination

-5.66 mas/yr

Galactic Cartesian (pc)

x = 0.338 · y = -0.678 · z = 0.652

Equatorial (J2000)

RA 296.50044° · Dec 40.72121°

Galactic ℓ, b

74.887° · 7.955°

Ecliptic λ, β

312.985° · 60.267°

HTM-20 index

-1422511107