Key parameters at a glance

A radius of 1.73 Earth radii
A mass of 3.64 Earth masses
Surface gravity around 1.22 g
An orbital period of 1.848 days
Semi-major axis 0.0288 AU
Equilibrium temperature 1,374 K (1101 °C)
Distance from Earth 2,655.32 light-years
Earth Similarity Index 0.200
Travel time at Voyager 1 speed 46,826,522 years

Kepler-1522 b Planet Profile

Physical Specs

Radius

1.73 R⊕

Radius (Jupiter)

0.154 R♃

Mass

3.64 M⊕

Mass (Jupiter)

0.012 M♃

Density

3.86 g/cm³

Surface Gravity

1.22 g (Earth)

Classification

Planet Type

Super-Earth

ESI Score 0.200

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

#356of 1176

top 30.2%

This planet

1.73R⊕

Super-Earth median

1.60R⊕

Nearest-size peers

Kepler-327 d 1.73 R⊕ Kepler-1608 b 1.73 R⊕ Kepler-238 b 1.73 R⊕

Metric	Earth	Kepler-1522 b	Jupiter
Radius (R⊕)	1.00	1.73	11.21
Mass (M⊕)	1.00	3.64	317.83
Density (g/cm³)	5.51	3.86	1.33
Surface Gravity (g)	1.00	1.22	2.53
Insolation (S⊕)	1.00	1,513.46	0.037

Star Catalogue Identifiers

TIC

TIC 267673944

Gaia DR2

Gaia DR2 2139306790481711232

Gaia DR3

Gaia DR3 2139306790481711232

System

Kepler-1522

Percentile among Super-Earth cohort

Radius 1.730 R⊕ · percentile 68 / cohort 1176

Mass 3.640 M⊕ · percentile 62 / cohort 1176

Orbital period 1.85 d · percentile 11 / cohort 1164

Distance 814.13 pc · percentile 69 / cohort 1171

ESI 0.200 · percentile 12 / cohort 1176

Orbit & Habitability

Orbital Dynamics

Period

1.848 days

Semi-major axis

0.0288 AU

Eccentricity

0.000

Inclination

89.73 °

Year Length

A year here lasts approximately 1.85 Earth days (0.5% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0288 AU.

Transit Fingerprint

Depth

0.032 %

Duration

1.893 h

Impact parameter b

0.218

Rp / R★

0.016749

Transit midpoint (BJD)

2,454,965.1998

Photometric dip

Transit produces a flux drop of 323 ppm lasting ≈ 1.89 h.

Extended Orbital Architecture

Planet / star radius ratio

0.016749

Semi-major axis / stellar radius

7.608

Impact parameter (b)

0.218

Transit mid-time (BJD)

2,454,965.1998

Angular separation (arcsec)

0.03540

Eq. Temperature

1,374K

(1101 °C)

Insolation (S⊕)

1,513.46

Earth = 1.00

Earth Similarity (ESI)

0.200

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-1522

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,706 K — cooler than the Sun (5,778 K)

Estimated Age

3.89 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.930 R☉

Stellar Mass

0.960 M☉

Metallicity [Fe/H]

-0.07

Extended Stellar Properties

Surface gravity (log g)

4.490 dex

Stellar density

2.272 g/cm³

Metallicity ratio

[Fe/H]

Distance

814.13 parsec

Light-years 2,655.32 ly

V-band magnitude

14.36 mag

Voyager-speed travel 46,826,522 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.200 mas

Total Proper Motion

11.951 mas/yr

PM Right Ascension

-2.16 mas/yr

PM Declination

11.75 mas/yr

Galactic Cartesian (pc)

x = 0.209 · y = -0.578 · z = 0.789

Equatorial (J2000)

RA 289.84323° · Dec 52.07021°

Galactic ℓ, b

83.276° · 17.046°

Ecliptic λ, β

313.908° · 72.491°

HTM-20 index

3367509