Key parameters at a glance

A radius of 2.64 Earth radii
A mass of 7.46 Earth masses
Surface gravity around 1.07 g
An orbital period of 23.450 days
Semi-major axis 0.1833 AU
Equilibrium temperature 802 K (529 °C)
Distance from Earth 3,721.70 light-years
Earth Similarity Index 0.309
Travel time at Voyager 1 speed 65,632,191 years

Kepler-635 b Planet Profile

Physical Specs

Radius

2.64 R⊕

Radius (Jupiter)

0.236 R♃

Mass

7.46 M⊕

Mass (Jupiter)

0.024 M♃

Density

2.23 g/cm³

Surface Gravity

1.07 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.309

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

#958of 1978

top 48.4%

This planet

2.64R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

TOI-421 b 2.64 R⊕ Kepler-1134 b 2.64 R⊕ Kepler-571 b 2.64 R⊕

Metric	Earth	Kepler-635 b	Jupiter
Radius (R⊕)	1.00	2.64	11.21
Mass (M⊕)	1.00	7.46	317.83
Density (g/cm³)	5.51	2.23	1.33
Surface Gravity (g)	1.00	1.07	2.53
Insolation (S⊕)	1.00	193.93	0.037

Star Catalogue Identifiers

TIC

TIC 394174221

Gaia DR2

Gaia DR2 2101380545634324096

Gaia DR3

Gaia DR3 2101380545634324096

System

Kepler-635

Percentile among Sub-Neptune cohort

Radius 2.640 R⊕ · percentile 51 / cohort 1978

Mass 7.460 M⊕ · percentile 47 / cohort 1978

Orbital period 23.45 d · percentile 67 / cohort 1946

Distance 1,141.08 pc · percentile 85 / cohort 1975

ESI 0.309 · percentile 30 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

23.450 days

Semi-major axis

0.1833 AU

Eccentricity

0.000

Inclination

89.46 °

Year Length

A year here lasts approximately 23.45 Earth days (6.4% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1833 AU.

Transit Fingerprint

Depth

0.032 %

Duration

8.653 h

Impact parameter b

0.800

Rp / R★

0.016193

Transit midpoint (BJD)

2,455,015.9229

Photometric dip

Transit produces a flux drop of 316 ppm lasting ≈ 8.65 h.

Extended Orbital Architecture

Planet / star radius ratio

0.016193

Semi-major axis / stellar radius

21.042

Impact parameter (b)

0.800

Transit mid-time (BJD)

2,455,015.9229

Angular separation (arcsec)

0.16100

Eq. Temperature

802K

(529 °C)

Insolation (S⊕)

193.93

Earth = 1.00

Earth Similarity (ESI)

0.309

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-635

Spectral Class

F-type yellow-white

Effective Temperature

6,174 K — hotter than the Sun (5,778 K)

Estimated Age

2.34 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.510 R☉

Stellar Mass

1.330 M☉

Metallicity [Fe/H]

0.41

Extended Stellar Properties

Surface gravity (log g)

4.200 dex

Stellar density

0.180 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,141.08 parsec

Light-years 3,721.70 ly

V-band magnitude

13.36 mag

Voyager-speed travel 65,632,191 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.848 mas

Total Proper Motion

4.562 mas/yr

PM Right Ascension

-3.22 mas/yr

PM Declination

-3.24 mas/yr

Galactic Cartesian (pc)

x = 0.256 · y = -0.712 · z = 0.653

Equatorial (J2000)

RA 289.77326° · Dec 40.80070°

Galactic ℓ, b

72.596° · 12.524°

Ecliptic λ, β

303.042° · 61.990°

HTM-20 index

-1562659140