Key parameters at a glance

A radius of 3.64 Earth radii
A mass of 12.90 Earth masses
Surface gravity around 0.97 g
An orbital period of 469.631 days
Semi-major axis 1.1266 AU
Equilibrium temperature 200 K (-73 °C)
Distance from Earth 3,488.08 light-years
Earth Similarity Index 0.500
Travel time at Voyager 1 speed 61,512,205 years

Kepler-1635 b Planet Profile

Physical Specs

Radius

3.64 R⊕

Radius (Jupiter)

0.325 R♃

Mass

12.90 M⊕

Mass (Jupiter)

0.041 M♃

Density

1.47 g/cm³

Surface Gravity

0.97 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.500

HZ Position Habitable

Controversial No

Discovery

Year 2016

Method Transit

Facility Kepler

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#120of 1978

top 6.0%

This planet

3.64R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-150 f 3.64 R⊕ Kepler-608 b 3.64 R⊕ Kepler-565 b 3.64 R⊕

Metric	Earth	Kepler-1635 b	Jupiter
Radius (R⊕)	1.00	3.64	11.21
Mass (M⊕)	1.00	12.90	317.83
Density (g/cm³)	5.51	1.47	1.33
Surface Gravity (g)	1.00	0.97	2.53
Insolation (S⊕)	1.00	0.40	0.037

Star Catalogue Identifiers

TIC

TIC 164891054

Gaia DR2

Gaia DR2 2106414144223503360

Gaia DR3

Gaia DR3 2106414144223503360

System

Kepler-1635

Percentile among Sub-Neptune cohort

Radius 3.640 R⊕ · percentile 94 / cohort 1978

Mass 12.900 M⊕ · percentile 87 / cohort 1978

Orbital period 469.63 d · percentile 100 / cohort 1946

Distance 1,069.45 pc · percentile 82 / cohort 1975

ESI 0.500 · percentile 70 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

469.631 days

Semi-major axis

1.1266 AU

Eccentricity

0.000

Inclination

89.61 °

Year Length

A year here lasts about 1.29 Earth years on a nearly circular orbit at a mean orbital distance of 1.1266 AU.

Transit Fingerprint

Depth

0.123 %

Duration

13.556 h

Impact parameter b

0.901

Rp / R★

0.038732

Transit midpoint (BJD)

2,455,255.4954

Photometric dip

Transit produces a flux drop of 1,235 ppm lasting ≈ 13.56 h.

Extended Orbital Architecture

Planet / star radius ratio

0.038732

Semi-major axis / stellar radius

133.100

Impact parameter (b)

0.901

Transit mid-time (BJD)

2,455,255.4954

Angular separation (arcsec)

1.05000

Eq. Temperature

200K

(-73 °C)

Insolation (S⊕)

0.40

Earth = 1.00

Earth Similarity (ESI)

0.500

0 = alien, 1 = Earth-identical

Within the conservative habitable zone — surface water would be frozen.

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-1635

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,347 K — cooler than the Sun (5,778 K)

Estimated Age

4.90 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

0.850 R☉

Stellar Mass

0.890 M☉

Metallicity [Fe/H]

0.06

Extended Stellar Properties

Surface gravity (log g)

4.530 dex

Stellar density

1.460 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,069.45 parsec

Light-years 3,488.08 ly

V-band magnitude

15.82 mag

Voyager-speed travel 61,512,205 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.907 mas

Total Proper Motion

6.048 mas/yr

PM Right Ascension

5.80 mas/yr

PM Declination

-1.70 mas/yr

Galactic Cartesian (pc)

x = 0.185 · y = -0.675 · z = 0.714

Equatorial (J2000)

RA 285.34905° · Dec 45.55618°

Galactic ℓ, b

75.797° · 17.366°

Ecliptic λ, β

298.912° · 67.461°

HTM-20 index

-1481311954