Key parameters at a glance

A radius of 0.79 Earth radii
A mass of 0.42 Earth masses
Surface gravity around 0.67 g
An orbital period of 0.540 days
Semi-major axis 0.0120 AU
Equilibrium temperature 1,871 K (1598 °C)
Distance from Earth 1,521.80 light-years
Earth Similarity Index 0.147
Travel time at Voyager 1 speed 26,836,910 years

Kepler-1566 b Planet Profile

Physical Specs

Radius

0.79 R⊕

Radius (Jupiter)

0.070 R♃

Mass

0.42 M⊕

Mass (Jupiter)

0.001 M♃

Density

4.66 g/cm³

Surface Gravity

0.67 g (Earth)

Classification

Planet Type

Rocky Terrestrial

ESI Score 0.147

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

#488of 570

top 85.4%

This planet

0.79R⊕

Rocky Terrestrial median

1.01R⊕

Nearest-size peers

Kepler-1235 b 0.79 R⊕ Kepler-1222 b 0.79 R⊕ Kepler-390 c 0.79 R⊕

Metric	Earth	Kepler-1566 b	Jupiter
Radius (R⊕)	1.00	0.79	11.21
Mass (M⊕)	1.00	0.42	317.83
Density (g/cm³)	5.51	4.66	1.33
Surface Gravity (g)	1.00	0.67	2.53
Insolation (S⊕)	1.00	2,340.98	0.037

Star Catalogue Identifiers

TIC

TIC 237191392

Gaia DR2

Gaia DR2 2103579397088495616

Gaia DR3

Gaia DR3 2103579397088495616

System

Kepler-1566

Percentile among Rocky Terrestrial cohort

Radius 0.790 R⊕ · percentile 14 / cohort 570

Mass 0.418 M⊕ · percentile 12 / cohort 570

Orbital period 0.54 d · percentile 3 / cohort 567

Distance 466.59 pc · percentile 60 / cohort 566

ESI 0.147 · percentile 4 / cohort 570

Orbit & Habitability

Orbital Dynamics

Period

0.540 days

Semi-major axis

0.0120 AU

Eccentricity

0.000

Inclination

85.27 °

Year Length

A year here lasts roughly 13 hours long on a nearly circular orbit at a mean orbital distance of 0.0120 AU.

Transit Fingerprint

Depth

0.010 %

Duration

1.139 h

Impact parameter b

0.078

Rp / R★

0.009235

Transit midpoint (BJD)

2,454,964.5518

Photometric dip

Transit produces a flux drop of 97 ppm lasting ≈ 1.14 h.

Extended Orbital Architecture

Planet / star radius ratio

0.009235

Semi-major axis / stellar radius

3.692

Impact parameter (b)

0.078

Transit mid-time (BJD)

2,454,964.5518

Angular separation (arcsec)

0.02570

Eq. Temperature

1,871K

(1598 °C)

Insolation (S⊕)

2,340.98

Earth = 1.00

Earth Similarity (ESI)

0.147

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-1566

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,254 K — cooler than the Sun (5,778 K)

Estimated Age

5.01 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

0.810 R☉

Stellar Mass

0.840 M☉

Metallicity [Fe/H]

-0.07

Extended Stellar Properties

Surface gravity (log g)

4.560 dex

Stellar density

1.910 g/cm³

Metallicity ratio

[Fe/H]

Distance

466.59 parsec

Light-years 1,521.80 ly

V-band magnitude

14.56 mag

Voyager-speed travel 26,836,910 yr

Multi-band Host Photometry — 17 bands

Astrometric Data

Parallax

2.114 mas

Total Proper Motion

14.328 mas/yr

PM Right Ascension

-11.44 mas/yr

PM Declination

-8.62 mas/yr

Galactic Cartesian (pc)

x = 0.178 · y = -0.738 · z = 0.650

Equatorial (J2000)

RA 283.58755° · Dec 40.57490°

Galactic ℓ, b

70.456° · 16.738°

Ecliptic λ, β

293.082° · 62.929°

HTM-20 index

-898351429