Key parameters at a glance

A radius of 8.56 Earth radii
A mass of 69.92 Earth masses
Surface gravity around 0.95 g
An orbital period of 288.822 days
Semi-major axis 1.0896 AU
Distance from Earth 5,873.48 light-years
Earth Similarity Index 0.359
Travel time at Voyager 1 speed 103,578,858 years

brightness_6

Circumbinary planet

Kepler-34 b orbits a binary-star pair rather than a single host — a minority architecture in the confirmed catalogue.

Kepler-34 b Planet Profile

Physical Specs

Radius

8.56 R⊕

Radius (Jupiter)

0.764 R♃

Mass

69.92 M⊕

Mass (Jupiter)

0.220 M♃

Density

0.61 g/cm³

Surface Gravity

0.95 g (Earth)

Classification

Planet Type

Neptune-like

ESI Score 0.359

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

#117of 574

top 20.2%

This planet

8.56R⊕

Neptune-like median

6.39R⊕

Nearest-size peers

HD 3765 b 8.56 R⊕ HATS-49 b 8.57 R⊕ TOI-4994 b 8.54 R⊕

Metric	Earth	Kepler-34 b	Jupiter
Radius (R⊕)	1.00	8.56	11.21
Mass (M⊕)	1.00	69.92	317.83
Density (g/cm³)	5.51	0.61	1.33
Surface Gravity (g)	1.00	0.95	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	69.920 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

TIC

TIC 272369124

Gaia DR2

Gaia DR2 2079692678777827712

Gaia DR3

Gaia DR3 2079692678777827712

System

Kepler-34

Percentile among Neptune-like cohort

Radius 8.564 R⊕ · percentile 80 / cohort 574

Mass 69.920 M⊕ · percentile 86 / cohort 574

Orbital period 288.82 d · percentile 93 / cohort 524

Distance 1,800.82 pc · percentile 88 / cohort 572

ESI 0.359 · percentile 65 / cohort 574

Orbit & Habitability

Orbital Dynamics

Period

288.822 days

Semi-major axis

1.0896 AU

Eccentricity

0.182

Inclination

90.36 °

Year Length

A year here lasts approximately 288.82 Earth days (79.1% of a terrestrial year) on a mildly elliptical path at a mean orbital distance of 1.0896 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.359

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-29 c · Sub-Neptune

Host System: Kepler-34

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,913 K — hotter than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

1.162 R☉

Stellar Mass

1.048 M☉

Metallicity [Fe/H]

-0.07

Extended Stellar Properties

Surface gravity (log g)

4.328 dex

Stellar density

0.253 g/cm³

Rotational v·sin i

5.00 km/s

Metallicity ratio

[M/H]

Distance

1,800.82 parsec

Light-years 5,873.48 ly

V-band magnitude

15.09 mag

Voyager-speed travel 103,578,858 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.527 mas

Total Proper Motion

6.179 mas/yr

PM Right Ascension

-3.45 mas/yr

PM Declination

-5.13 mas/yr

Galactic Cartesian (pc)

x = 0.317 · y = -0.637 · z = 0.703

Equatorial (J2000)

RA 296.43580° · Dec 44.64154°

Galactic ℓ, b

78.339° · 9.890°

Ecliptic λ, β

316.077° · 63.912°

HTM-20 index

-1956013079