Key parameters at a glance

A radius of 4.75 Earth radii
A mass of 20.20 Earth masses
Surface gravity around 0.90 g
An orbital period of 23.206 days
Semi-major axis 0.1662 AU
Equilibrium temperature 1,002 K (729 °C)
Distance from Earth 2,563.88 light-years
Earth Similarity Index 0.191
Travel time at Voyager 1 speed 45,214,074 years

Kepler-637 b Planet Profile

Physical Specs

Radius

4.75 R⊕

Radius (Jupiter)

0.424 R♃

Mass

20.20 M⊕

Mass (Jupiter)

0.064 M♃

Density

1.04 g/cm³

Surface Gravity

0.90 g (Earth)

Classification

Planet Type

Neptune-like

ESI Score 0.191

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

#420of 574

top 73.0%

This planet

4.75R⊕

Neptune-like median

6.39R⊕

Nearest-size peers

Kepler-553 b 4.74 R⊕ K2-27 b 4.74 R⊕ TOI-5126 b 4.74 R⊕

Metric	Earth	Kepler-637 b	Jupiter
Radius (R⊕)	1.00	4.75	11.21
Mass (M⊕)	1.00	20.20	317.83
Density (g/cm³)	5.51	1.04	1.33
Surface Gravity (g)	1.00	0.90	2.53
Insolation (S⊕)	1.00	63.81	0.037

Star Catalogue Identifiers

TIC

TIC 137626872

Gaia DR2

Gaia DR2 2053626934575934464

Gaia DR3

Gaia DR3 2053626934575934464

System

Kepler-637

Percentile among Neptune-like cohort

Radius 4.750 R⊕ · percentile 27 / cohort 574

Mass 20.200 M⊕ · percentile 30 / cohort 574

Orbital period 23.21 d · percentile 54 / cohort 524

Distance 786.09 pc · percentile 67 / cohort 572

ESI 0.191 · percentile 25 / cohort 574

Orbit & Habitability

Orbital Dynamics

Period

23.206 days

Semi-major axis

0.1662 AU

Eccentricity

0.000

Inclination

89.92 °

Year Length

A year here lasts approximately 23.21 Earth days (6.4% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1662 AU.

Transit Fingerprint

Depth

0.035 %

Duration

4.300 h

Impact parameter b

0.059

Rp / R★

0.017269

Transit midpoint (BJD)

2,455,013.7614

Photometric dip

Transit produces a flux drop of 348 ppm lasting ≈ 4.30 h.

Extended Orbital Architecture

Planet / star radius ratio

0.017269

Semi-major axis / stellar radius

41.610

Impact parameter (b)

0.059

Transit mid-time (BJD)

2,455,013.7614

Angular separation (arcsec)

0.21100

Eq. Temperature

1,002K

(729 °C)

Insolation (S⊕)

63.81

Earth = 1.00

Earth Similarity (ESI)

0.191

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-637

Spectral Class

F-type yellow-white

Effective Temperature

6,096 K — hotter than the Sun (5,778 K)

Estimated Age

2.19 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

2.560 R☉

Stellar Mass

1.640 M☉

Metallicity [Fe/H]

0.38

Extended Stellar Properties

Surface gravity (log g)

3.840 dex

Stellar density

0.600 g/cm³

Metallicity ratio

[Fe/H]

Distance

786.09 parsec

Light-years 2,563.88 ly

V-band magnitude

13.50 mag

Voyager-speed travel 45,214,074 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.243 mas

Total Proper Motion

5.469 mas/yr

PM Right Ascension

2.69 mas/yr

PM Declination

-4.76 mas/yr

Galactic Cartesian (pc)

x = 0.286 · y = -0.693 · z = 0.662

Equatorial (J2000)

RA 292.41726° · Dec 41.41684°

Galactic ℓ, b

74.050° · 11.001°

Ecliptic λ, β

307.481° · 61.970°

HTM-20 index

-429923768