Key parameters at a glance

A radius of 11.23 Earth radii
A mass of 157.18 Earth masses
Surface gravity around 1.25 g
An orbital period of 125.872 days
Semi-major axis 0.5016 AU
Equilibrium temperature 394 K (121 °C)
Distance from Earth 2,297.57 light-years
Earth Similarity Index 0.347
Travel time at Voyager 1 speed 40,517,588 years

3 siblings around Kepler-289

Kepler-289 c shares its host star with 3 other confirmed planets. Side-by-side measurements below.

Planet	Type	Radius (R⊕)	Mass (M⊕)	Period (d)	Eq. T (K)	Year
Kepler-289 b	Sub-Neptune	2.49	3.70	34.538	607	2014
Kepler-289 d	Sub-Neptune	3.03	5.33	66.028	—	2014
Kepler-289 c this	Gas Giant	11.23	157.18	125.872	394	2014
Kepler-289 e	Sub-Neptune	2.94	17.40	330.072	286	2025

Kepler-289 c Planet Profile

Physical Specs

Radius

11.23 R⊕

Radius (Jupiter)

1.002 R♃

Mass

157.18 M⊕

Mass (Jupiter)

0.490 M♃

Density

0.66 g/cm³

Surface Gravity

1.25 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.347

HZ Position Inner

Controversial No

Discovery

Year 2014

Method Transit

Facility Kepler

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#1627of 1771

top 91.8%

This planet

11.23R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

TOI-2449 b 11.24 R⊕ WASP-69 b 11.21 R⊕ TIC 172900988 b 11.25 R⊕

Metric	Earth	Kepler-289 c	Jupiter
Radius (R⊕)	1.00	11.23	11.21
Mass (M⊕)	1.00	157.18	317.83
Density (g/cm³)	5.51	0.66	1.33
Surface Gravity (g)	1.00	1.25	2.53
Insolation (S⊕)	1.00	4.88	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	157.180 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

TIC

TIC 273234825

Gaia DR2

Gaia DR2 2078515170549178880

Gaia DR3

Gaia DR3 2078515170549178880

System

Kepler-289

Percentile among Gas Giant cohort

Radius 11.230 R⊕ · percentile 8 / cohort 1771

Mass 157.180 M⊕ · percentile 13 / cohort 1747

Orbital period 125.87 d · percentile 55 / cohort 1533

Distance 704.44 pc · percentile 81 / cohort 1759

ESI 0.347 · percentile 70 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

125.872 days

Semi-major axis

0.5016 AU

Eccentricity

0.000

Inclination

89.78 °

Year Length

A year here lasts approximately 125.87 Earth days (34.5% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.5016 AU.

Transit Fingerprint

Depth

1.239 %

Duration

9.019 h

Impact parameter b

0.394

Rp / R★

0.102970

Transit midpoint (BJD)

2,455,069.6734

Photometric dip

Transit produces a flux drop of 12,390 ppm lasting ≈ 9.02 h.

Extended Orbital Architecture

Planet / star radius ratio

0.102970

Semi-major axis / stellar radius

108.950

Impact parameter (b)

0.394

Transit mid-time (BJD)

2,455,069.6734

Angular separation (arcsec)

0.71200

Eq. Temperature

394K

(121 °C)

Insolation (S⊕)

4.88

Earth = 1.00

Earth Similarity (ESI)

0.347

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water.

Detection Signatures

Transit photometry

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

Transit timing variations

Gravitational interactions from neighbours have been detected.

Discovery Paper

Primary reference

Rowe et al. 2014

Instrument

Kepler CCD Array

Publication

2014-03

Observation locale

Space

Discovery cohort

Planets confirmed in 2014 at Kepler (12 shown).

Kepler-186 e · Super-Earth Kepler-395 c · Super-Earth Kepler-220 e · Super-Earth Kepler-249 d · Super-Earth Kepler-296 f · Super-Earth Kepler-367 c · Rocky Terrestrial Kepler-296 e · Super-Earth Kepler-155 c · Sub-Neptune Kepler-138 d · Super-Earth Kepler-333 c · Rocky Terrestrial Kepler-331 d · Super-Earth Kepler-267 d · Sub-Neptune

Host System: Kepler-289

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,990 K — hotter than the Sun (5,778 K)

Estimated Age

0.65 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.000 R☉

Stellar Mass

1.080 M☉

Metallicity [Fe/H]

0.05

Extended Stellar Properties

Surface gravity (log g)

4.470 dex

Stellar density

1.580 g/cm³

Metallicity ratio

[Fe/H]

Distance

704.44 parsec

Light-years 2,297.57 ly

V-band magnitude

14.14 mag

Voyager-speed travel 40,517,588 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.391 mas

Total Proper Motion

4.785 mas/yr

PM Right Ascension

4.78 mas/yr

PM Declination

-0.24 mas/yr

Galactic Cartesian (pc)

x = 0.338 · y = -0.650 · z = 0.681

Equatorial (J2000)

RA 297.46534° · Dec 42.88285°

Galactic ℓ, b

77.147° · 8.386°

Ecliptic λ, β

316.043° · 62.002°

HTM-20 index

1432308909