Key parameters at a glance

A radius of 12.30 Earth radii
A mass of 640.00 Earth masses
Surface gravity around 4.23 g
An orbital period of 60.323 days
Semi-major axis 0.3000 AU
Equilibrium temperature 411 K (138 °C)
Distance from Earth 2,981.79 light-years
Earth Similarity Index 0.380
Travel time at Voyager 1 speed 52,583,805 years

2 siblings around Kepler-30

Kepler-30 c shares its host star with 2 other confirmed planets. Side-by-side measurements below.

Planet	Type	Radius (R⊕)	Mass (M⊕)	Period (d)	Eq. T (K)	Year
Kepler-30 b	Sub-Neptune	3.90	11.30	29.334	524	2012
Kepler-30 c this	Gas Giant	12.30	640.00	60.323	411	2012
Kepler-30 d	Neptune-like	8.80	23.10	143.344	308	2012

Kepler-30 c Planet Profile

Physical Specs

Radius

12.30 R⊕

Radius (Jupiter)

1.097 R♃

Mass

640.00 M⊕

Mass (Jupiter)

2.010 M♃

Density

1.88 g/cm³

Surface Gravity

4.23 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.380

HZ Position Inner

Controversial No

Discovery

Year 2012

Method Transit

Facility Kepler

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#1349of 1771

top 76.1%

This planet

12.30R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HAT-P-13 c 12.30 R⊕ HD 22781 b 12.30 R⊕ CHXR 73 b 12.30 R⊕

Metric	Earth	Kepler-30 c	Jupiter
Radius (R⊕)	1.00	12.30	11.21
Mass (M⊕)	1.00	640.00	317.83
Density (g/cm³)	5.51	1.88	1.33
Surface Gravity (g)	1.00	4.23	2.53
Insolation (S⊕)	1.00	6.22	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	640.000 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

TIC

TIC 399794329

Gaia DR2

Gaia DR2 2100243616248608896

Gaia DR3

Gaia DR3 2100243616248608896

System

Kepler-30

Percentile among Gas Giant cohort

Radius 12.300 R⊕ · percentile 22 / cohort 1771

Mass 640.000 M⊕ · percentile 55 / cohort 1747

Orbital period 60.32 d · percentile 51 / cohort 1533

Distance 914.22 pc · percentile 85 / cohort 1759

ESI 0.380 · percentile 79 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

60.323 days

Semi-major axis

0.3000 AU

Eccentricity

0.011

Inclination

90.32 °

Year Length

A year here lasts approximately 60.32 Earth days (16.5% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.3000 AU.

Transit Fingerprint

Depth

1.620 %

Duration

5.741 h

Impact parameter b

0.400

Rp / R★

0.136013

Transit midpoint (BJD)

2,455,357.8870

Photometric dip

Transit produces a flux drop of 16,200 ppm lasting ≈ 5.74 h.

Extended Orbital Architecture

Planet / star radius ratio

0.136013

Semi-major axis / stellar radius

61.300

Impact parameter (b)

0.400

Transit mid-time (BJD)

2,455,357.8870

Long. of periastron (ω)

-49.00°

Sky-projected obliquity (λ)

4.00°

Angular separation (arcsec)

0.32800

Eq. Temperature

411K

(138 °C)

Insolation (S⊕)

6.22

Earth = 1.00

Earth Similarity (ESI)

0.380

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

Sanchis Ojeda et al. 2012

Instrument

Kepler CCD Array

Publication

2012-07

Observation locale

Space

Discovery cohort

Planets confirmed in 2012 at Kepler (12 shown).

Kepler-54 c · Rocky Terrestrial Kepler-49 c · Sub-Neptune Kepler-55 b · Sub-Neptune Kepler-49 b · Sub-Neptune Kepler-81 c · Sub-Neptune Kepler-55 c · Sub-Neptune Kepler-52 c · Super-Earth Kepler-83 c · Sub-Neptune Kepler-32 d · Sub-Neptune Kepler-83 b · Sub-Neptune Kepler-54 b · Sub-Neptune Kepler-80 c · Sub-Neptune

Host System: Kepler-30

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,498 K — cooler than the Sun (5,778 K)

Estimated Age

2.00 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.950 R☉

Stellar Mass

0.990 M☉

Metallicity [Fe/H]

0.18

Extended Stellar Properties

Surface gravity (log g)

4.770 dex

Stellar density

2.000 g/cm³

Rotational v·sin i

1.94 km/s

Metallicity ratio

[Fe/H]

Distance

914.22 parsec

Light-years 2,981.79 ly

V-band magnitude

15.73 mag

Voyager-speed travel 52,583,805 yr

Multi-band Host Photometry — 17 bands

Astrometric Data

Parallax

1.066 mas

Total Proper Motion

4.812 mas/yr

PM Right Ascension

0.70 mas/yr

PM Declination

-4.76 mas/yr

Galactic Cartesian (pc)

x = 0.205 · y = -0.750 · z = 0.629

Equatorial (J2000)

RA 285.28365° · Dec 38.94726°

Galactic ℓ, b

69.407° · 14.913°

Ecliptic λ, β

295.065° · 61.063°

HTM-20 index

292778943