Key parameters at a glance

A radius of 1.58 Earth radii
A mass of 3.12 Earth masses
Surface gravity around 1.25 g
An orbital period of 0.939 days
Semi-major axis 0.0187 AU
Equilibrium temperature 1,676 K (1403 °C)
Distance from Earth 2,823.19 light-years
Earth Similarity Index 0.163
Travel time at Voyager 1 speed 49,787,011 years

Kepler-1523 b Planet Profile

Physical Specs

Radius

1.58 R⊕

Radius (Jupiter)

0.141 R♃

Mass

3.12 M⊕

Mass (Jupiter)

0.010 M♃

Density

4.35 g/cm³

Surface Gravity

1.25 g (Earth)

Classification

Planet Type

Super-Earth

ESI Score 0.163

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

#603of 1176

top 51.2%

This planet

1.58R⊕

Super-Earth median

1.60R⊕

Nearest-size peers

Kepler-111 b 1.58 R⊕ Kepler-445 b 1.58 R⊕ Kepler-386 c 1.58 R⊕

Metric	Earth	Kepler-1523 b	Jupiter
Radius (R⊕)	1.00	1.58	11.21
Mass (M⊕)	1.00	3.12	317.83
Density (g/cm³)	5.51	4.35	1.33
Surface Gravity (g)	1.00	1.25	2.53
Insolation (S⊕)	1.00	2,218.15	0.037

Star Catalogue Identifiers

TIC

TIC 272083995

Gaia DR2

Gaia DR2 2080193506325008256

Gaia DR3

Gaia DR3 2080193506325008256

System

Kepler-1523

Percentile among Super-Earth cohort

Radius 1.580 R⊕ · percentile 48 / cohort 1176

Mass 3.120 M⊕ · percentile 44 / cohort 1176

Orbital period 0.94 d · percentile 5 / cohort 1164

Distance 865.60 pc · percentile 73 / cohort 1171

ESI 0.163 · percentile 6 / cohort 1176

Orbit & Habitability

Orbital Dynamics

Period

0.939 days

Semi-major axis

0.0187 AU

Eccentricity

0.000

Inclination

89.86 °

Year Length

A year here lasts roughly 22.5 hours long on a nearly circular orbit at a mean orbital distance of 0.0187 AU.

Transit Fingerprint

Depth

0.028 %

Duration

1.390 h

Impact parameter b

0.013

Rp / R★

0.015350

Transit midpoint (BJD)

2,454,964.6821

Photometric dip

Transit produces a flux drop of 281 ppm lasting ≈ 1.39 h.

Extended Orbital Architecture

Planet / star radius ratio

0.015350

Semi-major axis / stellar radius

5.397

Impact parameter (b)

0.013

Transit mid-time (BJD)

2,454,964.6821

Angular separation (arcsec)

0.02160

Eq. Temperature

1,676K

(1403 °C)

Insolation (S⊕)

2,218.15

Earth = 1.00

Earth Similarity (ESI)

0.163

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-1523

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,708 K — cooler than the Sun (5,778 K)

Estimated Age

4.37 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.960 R☉

Stellar Mass

0.970 M☉

Metallicity [Fe/H]

0.00

Extended Stellar Properties

Surface gravity (log g)

4.460 dex

Stellar density

1.270 g/cm³

Metallicity ratio

[Fe/H]

Distance

865.60 parsec

Light-years 2,823.19 ly

V-band magnitude

14.99 mag

Voyager-speed travel 49,787,011 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.127 mas

Total Proper Motion

3.926 mas/yr

PM Right Ascension

-0.11 mas/yr

PM Declination

-3.92 mas/yr

Galactic Cartesian (pc)

x = 0.306 · y = -0.626 · z = 0.717

Equatorial (J2000)

RA 296.05407° · Dec 45.82704°

Galactic ℓ, b

79.269° · 10.690°

Ecliptic λ, β

316.633° · 65.103°

HTM-20 index

-1993469234