Key parameters at a glance

A radius of 2.86 Earth radii
A mass of 53.00 Earth masses
Surface gravity around 6.48 g
An orbital period of 15.574 days
Semi-major axis 0.1231 AU
Equilibrium temperature 799 K (526 °C)
Distance from Earth 3,161.27 light-years
Earth Similarity Index 0.289
Travel time at Voyager 1 speed 55,749,056 years

3 siblings around Kepler-58

Kepler-58 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-58 e	Super-Earth	1.61	597.80	4.458	1,212	2023
Kepler-58 b	Sub-Neptune	2.78	35.50	10.218	920	2012
Kepler-58 c this	Sub-Neptune	2.86	53.00	15.574	799	2012
Kepler-58 d	Sub-Neptune	2.94	245.34	40.101	583	2014

Kepler-58 c Planet Profile

Physical Specs

Radius

2.86 R⊕

Radius (Jupiter)

0.255 R♃

Mass

53.00 M⊕

Mass (Jupiter)

0.167 M♃

Density

10.00 g/cm³

Surface Gravity

6.48 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.289

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

#671of 1978

top 33.9%

This planet

2.86R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-142 c 2.86 R⊕ Kepler-170 c 2.86 R⊕ Kepler-1237 b 2.86 R⊕

Metric	Earth	Kepler-58 c	Jupiter
Radius (R⊕)	1.00	2.86	11.21
Mass (M⊕)	1.00	53.00	317.83
Density (g/cm³)	5.51	10.00	1.33
Surface Gravity (g)	1.00	6.48	2.53
Insolation (S⊕)	1.00	64.39	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	53.000 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

TIC

TIC 184471242

Gaia DR2

Gaia DR2 2073274618947678464

Gaia DR3

Gaia DR3 2073274618947678464

System

Kepler-58

Percentile among Sub-Neptune cohort

Radius 2.860 R⊕ · percentile 66 / cohort 1978

Mass 53.000 M⊕ · percentile 98 / cohort 1978

Orbital period 15.57 d · percentile 52 / cohort 1946

Distance 969.25 pc · percentile 76 / cohort 1975

ESI 0.289 · percentile 25 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

15.574 days

Semi-major axis

0.1231 AU

Eccentricity

0.000

Inclination

83.89 °

Year Length

A year here lasts approximately 15.57 Earth days (4.3% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1231 AU.

Transit Fingerprint

Depth

0.047 %

Duration

5.101 h

Impact parameter b

0.775

Rp / R★

0.025420

Transit midpoint (BJD)

2,454,965.4321

Photometric dip

Transit produces a flux drop of 468 ppm lasting ≈ 5.10 h.

Extended Orbital Architecture

Planet / star radius ratio

0.025420

Semi-major axis / stellar radius

8.900

Impact parameter (b)

0.775

Transit mid-time (BJD)

2,454,965.4321

Angular separation (arcsec)

0.12700

Eq. Temperature

799K

(526 °C)

Insolation (S⊕)

64.39

Earth = 1.00

Earth Similarity (ESI)

0.289

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

Steffen et al. 2013

Instrument

Kepler CCD Array

Publication

2013-01

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-58

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,843 K — hotter than the Sun (5,778 K)

Estimated Age

2.14 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.030 R☉

Stellar Mass

0.950 M☉

Metallicity [Fe/H]

0.10

Extended Stellar Properties

Surface gravity (log g)

4.390 dex

Stellar density

1.150 g/cm³

Metallicity ratio

[Fe/H]

Distance

969.25 parsec

Light-years 3,161.27 ly

V-band magnitude

15.09 mag

Voyager-speed travel 55,749,056 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.004 mas

Total Proper Motion

4.187 mas/yr

PM Right Ascension

-4.18 mas/yr

PM Declination

0.14 mas/yr

Galactic Cartesian (pc)

x = 0.344 · y = -0.695 · z = 0.631

Equatorial (J2000)

RA 296.35863° · Dec 39.11520°

Galactic ℓ, b

73.419° · 7.266°

Ecliptic λ, β

311.677° · 58.800°

HTM-20 index

-1154929470