Key parameters at a glance

A radius of 1.96 Earth radii
A mass of 4.50 Earth masses
Surface gravity around 1.17 g
An orbital period of 5.836 days
Semi-major axis 0.0616 AU
Equilibrium temperature 884 K (611 °C)
Distance from Earth 826.14 light-years
Earth Similarity Index 0.312
Travel time at Voyager 1 speed 14,568,922 years

Kepler-523 b Planet Profile

Physical Specs

Radius

1.96 R⊕

Radius (Jupiter)

0.175 R♃

Mass

4.50 M⊕

Mass (Jupiter)

0.014 M♃

Density

3.28 g/cm³

Surface Gravity

1.17 g (Earth)

Classification

Planet Type

Super-Earth

ESI Score 0.312

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

#49of 1176

top 4.1%

This planet

1.96R⊕

Super-Earth median

1.60R⊕

Nearest-size peers

Kepler-174 b 1.96 R⊕ Kepler-792 b 1.96 R⊕ Kepler-118 b 1.96 R⊕

Metric	Earth	Kepler-523 b	Jupiter
Radius (R⊕)	1.00	1.96	11.21
Mass (M⊕)	1.00	4.50	317.83
Density (g/cm³)	5.51	3.28	1.33
Surface Gravity (g)	1.00	1.17	2.53
Insolation (S⊕)	1.00	149.14	0.037

Star Catalogue Identifiers

TIC

TIC 164654277

Gaia DR2

Gaia DR2 2106821925598401152

Gaia DR3

Gaia DR3 2106821925598401152

System

Kepler-523

Percentile among Super-Earth cohort

Radius 1.960 R⊕ · percentile 95 / cohort 1176

Mass 4.500 M⊕ · percentile 86 / cohort 1176

Orbital period 5.84 d · percentile 46 / cohort 1164

Distance 253.30 pc · percentile 28 / cohort 1171

ESI 0.312 · percentile 39 / cohort 1176

Orbit & Habitability

Orbital Dynamics

Period

5.836 days

Semi-major axis

0.0616 AU

Eccentricity

0.000

Inclination

89.66 °

Year Length

A year here lasts approximately 5.84 Earth days (1.6% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0616 AU.

Transit Fingerprint

Depth

0.055 %

Duration

2.060 h

Impact parameter b

0.129

Rp / R★

0.021113

Transit midpoint (BJD)

2,455,002.8751

Photometric dip

Transit produces a flux drop of 547 ppm lasting ≈ 2.06 h.

Extended Orbital Architecture

Planet / star radius ratio

0.021113

Semi-major axis / stellar radius

22.055

Impact parameter (b)

0.129

Transit mid-time (BJD)

2,455,002.8751

Angular separation (arcsec)

0.24300

Eq. Temperature

884K

(611 °C)

Insolation (S⊕)

149.14

Earth = 1.00

Earth Similarity (ESI)

0.312

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

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-523

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,515 K — cooler than the Sun (5,778 K)

Estimated Age

2.45 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.860 R☉

Stellar Mass

0.930 M☉

Metallicity [Fe/H]

-0.03

Extended Stellar Properties

Surface gravity (log g)

4.540 dex

Stellar density

1.640 g/cm³

Systemic radial velocity

6.37 km/s

Metallicity ratio

[Fe/H]

Distance

253.30 parsec

Light-years 826.14 ly

V-band magnitude

12.59 mag

Voyager-speed travel 14,568,922 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

3.919 mas

Total Proper Motion

7.915 mas/yr

PM Right Ascension

-0.77 mas/yr

PM Declination

-7.88 mas/yr

Galactic Cartesian (pc)

x = 0.170 · y = -0.680 · z = 0.713

Equatorial (J2000)

RA 284.06112° · Dec 45.50681°

Galactic ℓ, b

75.410° · 18.191°

Ecliptic λ, β

296.599° · 67.652°

HTM-20 index

493906016