Key parameters at a glance

A radius of 8.16 Earth radii
A mass of 40.36 Earth masses
Surface gravity around 0.61 g
An orbital period of 131.458 days
Semi-major axis 0.6035 AU
Distance from Earth 5,933.33 light-years
Earth Similarity Index 0.331
Travel time at Voyager 1 speed 104,634,306 years

brightness_6

Circumbinary planet

Kepler-35 b orbits a binary-star pair rather than a single host — a minority architecture in the confirmed catalogue.

Kepler-35 b Planet Profile

Physical Specs

Radius

8.16 R⊕

Radius (Jupiter)

0.728 R♃

Mass

40.36 M⊕

Mass (Jupiter)

0.127 M♃

Density

0.41 g/cm³

Surface Gravity

0.61 g (Earth)

Classification

Planet Type

Neptune-like

ESI Score 0.331

HZ Position Unknown

Controversial No

Discovery

Year 2011

Method Transit

Facility Kepler

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#148of 574

top 25.6%

This planet

8.16R⊕

Neptune-like median

6.39R⊕

Nearest-size peers

TOI-2000 c 8.14 R⊕ KMT-2024-BLG-2005L b 8.18 R⊕ Kepler-108 c 8.18 R⊕

Metric	Earth	Kepler-35 b	Jupiter
Radius (R⊕)	1.00	8.16	11.21
Mass (M⊕)	1.00	40.36	317.83
Density (g/cm³)	5.51	0.41	1.33
Surface Gravity (g)	1.00	0.61	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	40.363 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

TIC

TIC 271040768

Gaia DR2

Gaia DR2 2128155371757730816

Gaia DR3

Gaia DR3 2128155371757730816

System

Kepler-35

Percentile among Neptune-like cohort

Radius 8.160 R⊕ · percentile 74 / cohort 574

Mass 40.363 M⊕ · percentile 63 / cohort 574

Orbital period 131.46 d · percentile 85 / cohort 524

Distance 1,819.17 pc · percentile 88 / cohort 572

ESI 0.331 · percentile 58 / cohort 574

Orbit & Habitability

Orbital Dynamics

Period

131.458 days

Semi-major axis

0.6035 AU

Eccentricity

0.042

Inclination

90.76 °

Year Length

A year here lasts approximately 131.46 Earth days (36.0% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.6035 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.331

0 = alien, 1 = Earth-identical

Detection Signatures

Transit photometry

A transit dip has been observed from at least one telescope.

Radial velocity

Stellar wobble has been measured spectroscopically.

Transit timing variations

Gravitational interactions from neighbours have been detected.

Discovery Paper

Primary reference

Welsh et al. 2012

Instrument

Kepler CCD Array

Publication

2012-01

Observation locale

Space

Discovery cohort

Planets confirmed in 2011 at Kepler (12 shown).

Kepler-22 b · Sub-Neptune Kepler-20 d · Sub-Neptune Kepler-26 c · Sub-Neptune Kepler-19 c · Sub-Neptune Kepler-26 b · Sub-Neptune Kepler-28 c · Super-Earth Kepler-10 c · Sub-Neptune Kepler-20 f · Rocky Terrestrial Kepler-42 d · Rocky Terrestrial Kepler-16 b · Neptune-like Kepler-28 b · Super-Earth Kepler-34 b · Neptune-like

Host System: Kepler-35

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,606 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

1.028 R☉

Stellar Mass

0.888 M☉

Metallicity [Fe/H]

-0.34

Extended Stellar Properties

Surface gravity (log g)

4.362 dex

Stellar density

2.806 g/cm³

Rotational v·sin i

5.00 km/s

Metallicity ratio

[M/H]

Distance

1,819.17 parsec

Light-years 5,933.33 ly

V-band magnitude

15.86 mag

Voyager-speed travel 104,634,306 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.522 mas

Total Proper Motion

8.570 mas/yr

PM Right Ascension

-2.28 mas/yr

PM Declination

-8.26 mas/yr

Galactic Cartesian (pc)

x = 0.284 · y = -0.624 · z = 0.728

Equatorial (J2000)

RA 294.49696° · Dec 46.68967°

Galactic ℓ, b

79.541° · 12.043°

Ecliptic λ, β

315.115° · 66.334°

HTM-20 index

-1096564739