Key parameters at a glance

A radius of 12.45 Earth radii
An orbital period of 127.282 days
Semi-major axis 0.5030 AU
Equilibrium temperature 392 K (119 °C)
Distance from Earth 4,574.60 light-years
Earth Similarity Index 0.366
Travel time at Voyager 1 speed 80,673,046 years

1 sibling around Kepler-302

Kepler-302 c shares its host star with 1 other confirmed planet. Side-by-side measurements below.

Planet	Type	Radius (R⊕)	Mass (M⊕)	Period (d)	Eq. T (K)	Year
Kepler-302 b	Neptune-like	4.06	15.50	30.184	634	2014
Kepler-302 c this	Gas Giant	12.45	—	127.282	392	2014

Kepler-302 c Planet Profile

Physical Specs

Radius

12.45 R⊕

Radius (Jupiter)

1.111 R♃

Mass

— M⊕

Mass (Jupiter)

— M♃

Density

— g/cm³

Surface Gravity

— g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.366

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

#1284of 1771

top 72.4%

This planet

12.45R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

KELT-1 b 12.44 R⊕ KOI-217 b 12.44 R⊕ WASP-11 b 12.44 R⊕

Metric	Earth	Kepler-302 c	Jupiter
Radius (R⊕)	1.00	12.45	11.21
Mass (M⊕)	1.00	—	317.83
Density (g/cm³)	5.51	—	1.33
Surface Gravity (g)	1.00	—	2.53
Insolation (S⊕)	1.00	4.59	0.037

Star Catalogue Identifiers

TIC

TIC 270951852

Gaia DR2

Gaia DR2 2078195212660287616

Gaia DR3

Gaia DR3 2078195212660287616

System

Kepler-302

Percentile among Gas Giant cohort

Radius 12.450 R⊕ · percentile 27 / cohort 1771

Orbital period 127.28 d · percentile 55 / cohort 1533

Distance 1,402.58 pc · percentile 89 / cohort 1759

ESI 0.366 · percentile 75 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

127.282 days

Semi-major axis

0.5030 AU

Eccentricity

0.000

Inclination

89.51 °

Year Length

A year here lasts approximately 127.28 Earth days (34.8% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.5030 AU.

Transit Fingerprint

Depth

0.809 %

Duration

7.160 h

Impact parameter b

0.830

Rp / R★

0.093207

Transit midpoint (BJD)

2,454,996.8894

Photometric dip

Transit produces a flux drop of 8,089 ppm lasting ≈ 7.16 h.

Extended Orbital Architecture

Planet / star radius ratio

0.093207

Semi-major axis / stellar radius

97.120

Impact parameter (b)

0.830

Transit mid-time (BJD)

2,454,996.8894

Angular separation (arcsec)

0.35900

Eq. Temperature

392K

(119 °C)

Insolation (S⊕)

4.59

Earth = 1.00

Earth Similarity (ESI)

0.366

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

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-302

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,740 K — cooler than the Sun (5,778 K)

Estimated Age

4.47 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.220 R☉

Stellar Mass

1.021 M☉

Metallicity [Fe/H]

0.16

Extended Stellar Properties

Surface gravity (log g)

4.286 dex

Stellar density

1.070 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,402.58 parsec

Light-years 4,574.60 ly

V-band magnitude

15.69 mag

Voyager-speed travel 80,673,046 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.685 mas

Total Proper Motion

17.566 mas/yr

PM Right Ascension

-6.25 mas/yr

PM Declination

-16.42 mas/yr

Galactic Cartesian (pc)

x = 0.298 · y = -0.660 · z = 0.690

Equatorial (J2000)

RA 294.31693° · Dec 43.62924°

Galactic ℓ, b

76.705° · 10.758°

Ecliptic λ, β

312.023° · 63.563°

HTM-20 index

-1340158003