Key parameters at a glance

A radius of 1.07 Earth radii
A mass of 1.24 Earth masses
Surface gravity around 1.08 g
An orbital period of 5.211 days
Semi-major axis 0.0604 AU
Equilibrium temperature 1,107 K (834 °C)
Distance from Earth 2,034.89 light-years
Earth Similarity Index 0.287
Travel time at Voyager 1 speed 35,885,293 years

1 sibling around Kepler-520

Kepler-520 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-520 c this	Rocky Terrestrial	1.07	1.24	5.211	1,107	2016
Kepler-520 b	Super-Earth	1.66	3.39	19.674	711	2016

Kepler-520 c Planet Profile

Physical Specs

Radius

1.07 R⊕

Radius (Jupiter)

0.095 R♃

Mass

1.24 M⊕

Mass (Jupiter)

0.004 M♃

Density

5.56 g/cm³

Surface Gravity

1.08 g (Earth)

Classification

Planet Type

Rocky Terrestrial

ESI Score 0.287

HZ Position Inner

Controversial No

Discovery

Year 2016

Method Transit

Facility Kepler

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#262of 570

top 45.8%

This planet

1.07R⊕

Rocky Terrestrial median

1.01R⊕

Nearest-size peers

Kepler-376 b 1.07 R⊕ Kepler-186 b 1.07 R⊕ Kepler-1570 b 1.07 R⊕

Metric	Earth	Kepler-520 c	Jupiter
Radius (R⊕)	1.00	1.07	11.21
Mass (M⊕)	1.00	1.24	317.83
Density (g/cm³)	5.51	5.56	1.33
Surface Gravity (g)	1.00	1.08	2.53
Insolation (S⊕)	1.00	351.69	0.037

Star Catalogue Identifiers

TIC

TIC 138097531

Gaia DR2

Gaia DR2 2077598384004774912

Gaia DR3

Gaia DR3 2077598384004774912

System

Kepler-520

Percentile among Rocky Terrestrial cohort

Radius 1.070 R⊕ · percentile 53 / cohort 570

Mass 1.240 M⊕ · percentile 48 / cohort 570

Orbital period 5.21 d · percentile 55 / cohort 567

Distance 623.90 pc · percentile 75 / cohort 566

ESI 0.287 · percentile 35 / cohort 570

Orbit & Habitability

Orbital Dynamics

Period

5.211 days

Semi-major axis

0.0604 AU

Eccentricity

0.000

Inclination

83.02 °

Year Length

A year here lasts approximately 5.21 Earth days (1.4% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0604 AU.

Transit Fingerprint

Depth

0.010 %

Duration

3.301 h

Impact parameter b

0.660

Rp / R★

0.009331

Transit midpoint (BJD)

2,454,964.5396

Photometric dip

Transit produces a flux drop of 104 ppm lasting ≈ 3.30 h.

Extended Orbital Architecture

Planet / star radius ratio

0.009331

Semi-major axis / stellar radius

12.158

Impact parameter (b)

0.660

Transit mid-time (BJD)

2,454,964.5396

Angular separation (arcsec)

0.09670

Eq. Temperature

1,107K

(834 °C)

Insolation (S⊕)

351.69

Earth = 1.00

Earth Similarity (ESI)

0.287

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched.

Discovery Paper

Primary reference

Morton et al. 2016

Instrument

Kepler CCD Array

Publication

2016-05

Observation locale

Space

Discovery cohort

Planets confirmed in 2016 at Kepler (12 shown).

Kepler-1512 b · Rocky Terrestrial Kepler-1410 b · Super-Earth Kepler-560 b · Super-Earth Kepler-1389 b · Super-Earth Kepler-1450 b · Super-Earth Kepler-1544 b · Super-Earth Kepler-1459 b · Super-Earth Kepler-1638 b · Super-Earth Kepler-737 b · Super-Earth Kepler-1185 b · Super-Earth Kepler-1178 b · Rocky Terrestrial Kepler-1040 b · Sub-Neptune

Host System: Kepler-520

Spectral Class

F-type yellow-white

Effective Temperature

6,112 K — hotter than the Sun (5,778 K)

Estimated Age

2.04 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.090 R☉

Stellar Mass

1.100 M☉

Metallicity [Fe/H]

-0.03

Extended Stellar Properties

Surface gravity (log g)

4.410 dex

Stellar density

0.260 g/cm³

Systemic radial velocity

23.01 km/s

Metallicity ratio

[Fe/H]

Distance

623.90 parsec

Light-years 2,034.89 ly

V-band magnitude

12.80 mag

Voyager-speed travel 35,885,293 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.337 mas

Total Proper Motion

6.140 mas/yr

PM Right Ascension

-4.09 mas/yr

PM Declination

-4.58 mas/yr

Galactic Cartesian (pc)

x = 0.294 · y = -0.687 · z = 0.664

Equatorial (J2000)

RA 293.18029° · Dec 41.61774°

Galactic ℓ, b

74.495° · 10.582°

Ecliptic λ, β

308.770° · 61.972°

HTM-20 index

-198086880