Key parameters at a glance

A radius of 2.64 Earth radii
A mass of 7.46 Earth masses
Surface gravity around 1.07 g
An orbital period of 4.799 days
Semi-major axis 0.0546 AU
Equilibrium temperature 978 K (705 °C)
Distance from Earth 2,360.96 light-years
Earth Similarity Index 0.251
Travel time at Voyager 1 speed 41,635,558 years

Kepler-571 b Planet Profile

Physical Specs

Radius

2.64 R⊕

Radius (Jupiter)

0.236 R♃

Mass

7.46 M⊕

Mass (Jupiter)

0.024 M♃

Density

2.23 g/cm³

Surface Gravity

1.07 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.251

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

#958of 1978

top 48.4%

This planet

2.64R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-635 b 2.64 R⊕ Kepler-1134 b 2.64 R⊕ TOI-421 b 2.64 R⊕

Metric	Earth	Kepler-571 b	Jupiter
Radius (R⊕)	1.00	2.64	11.21
Mass (M⊕)	1.00	7.46	317.83
Density (g/cm³)	5.51	2.23	1.33
Surface Gravity (g)	1.00	1.07	2.53
Insolation (S⊕)	1.00	219.04	0.037

Star Catalogue Identifiers

TIC

TIC 243271972

Gaia DR2

Gaia DR2 2132069598789224960

Gaia DR3

Gaia DR3 2132069598789224960

System

Kepler-571

Percentile among Sub-Neptune cohort

Radius 2.640 R⊕ · percentile 51 / cohort 1978

Mass 7.460 M⊕ · percentile 47 / cohort 1978

Orbital period 4.80 d · percentile 11 / cohort 1946

Distance 723.88 pc · percentile 61 / cohort 1975

ESI 0.251 · percentile 16 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

4.799 days

Semi-major axis

0.0546 AU

Eccentricity

0.000

Inclination

86.64 °

Year Length

A year here lasts approximately 4.80 Earth days (1.3% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0546 AU.

Transit Fingerprint

Depth

0.082 %

Duration

2.998 h

Impact parameter b

0.314

Rp / R★

0.026937

Transit midpoint (BJD)

2,455,006.2578

Photometric dip

Transit produces a flux drop of 817 ppm lasting ≈ 3.00 h.

Extended Orbital Architecture

Planet / star radius ratio

0.026937

Semi-major axis / stellar radius

11.970

Impact parameter (b)

0.314

Transit mid-time (BJD)

2,455,006.2578

Angular separation (arcsec)

0.07540

Eq. Temperature

978K

(705 °C)

Insolation (S⊕)

219.04

Earth = 1.00

Earth Similarity (ESI)

0.251

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-571

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,527 K — cooler than the Sun (5,778 K)

Estimated Age

4.68 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

0.900 R☉

Stellar Mass

0.930 M☉

Metallicity [Fe/H]

0.01

Extended Stellar Properties

Surface gravity (log g)

4.510 dex

Stellar density

1.410 g/cm³

Metallicity ratio

[Fe/H]

Distance

723.88 parsec

Light-years 2,360.96 ly

V-band magnitude

14.95 mag

Voyager-speed travel 41,635,558 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.353 mas

Total Proper Motion

7.648 mas/yr

PM Right Ascension

3.42 mas/yr

PM Declination

6.84 mas/yr

Galactic Cartesian (pc)

x = 0.185 · y = -0.624 · z = 0.759

Equatorial (J2000)

RA 286.55104° · Dec 49.41873°

Galactic ℓ, b

79.886° · 18.001°

Ecliptic λ, β

304.459° · 70.884°

HTM-20 index

339715298