Key parameters at a glance

A radius of 3.36 Earth radii
A mass of 11.20 Earth masses
Surface gravity around 0.99 g
An orbital period of 14.088 days
Semi-major axis 0.1138 AU
Equilibrium temperature 724 K (451 °C)
Distance from Earth 3,919.81 light-years
Earth Similarity Index 0.311
Travel time at Voyager 1 speed 69,125,811 years

Kepler-1057 b Planet Profile

Physical Specs

Radius

3.36 R⊕

Radius (Jupiter)

0.300 R♃

Mass

11.20 M⊕

Mass (Jupiter)

0.035 M♃

Density

1.62 g/cm³

Surface Gravity

0.99 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.311

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

#242of 1978

top 12.2%

This planet

3.36R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-541 b 3.36 R⊕ Kepler-1510 b 3.36 R⊕ Kepler-1083 b 3.36 R⊕

Metric	Earth	Kepler-1057 b	Jupiter
Radius (R⊕)	1.00	3.36	11.21
Mass (M⊕)	1.00	11.20	317.83
Density (g/cm³)	5.51	1.62	1.33
Surface Gravity (g)	1.00	0.99	2.53
Insolation (S⊕)	1.00	69.21	0.037

Star Catalogue Identifiers

TIC

TIC 169463893

Gaia DR2

Gaia DR2 2076891329311747584

Gaia DR3

Gaia DR3 2076891329311747584

System

Kepler-1057

Percentile among Sub-Neptune cohort

Radius 3.360 R⊕ · percentile 87 / cohort 1978

Mass 11.200 M⊕ · percentile 81 / cohort 1978

Orbital period 14.09 d · percentile 48 / cohort 1946

Distance 1,201.82 pc · percentile 86 / cohort 1975

ESI 0.311 · percentile 31 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

14.088 days

Semi-major axis

0.1138 AU

Eccentricity

0.000

Inclination

89.71 °

Year Length

A year here lasts approximately 14.09 Earth days (3.9% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1138 AU.

Transit Fingerprint

Depth

0.095 %

Duration

4.162 h

Impact parameter b

0.183

Rp / R★

0.028128

Transit midpoint (BJD)

2,454,970.3442

Photometric dip

Transit produces a flux drop of 947 ppm lasting ≈ 4.16 h.

Extended Orbital Architecture

Planet / star radius ratio

0.028128

Semi-major axis / stellar radius

26.200

Impact parameter (b)

0.183

Transit mid-time (BJD)

2,454,970.3442

Angular separation (arcsec)

0.09470

Eq. Temperature

724K

(451 °C)

Insolation (S⊕)

69.21

Earth = 1.00

Earth Similarity (ESI)

0.311

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-1057

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,987 K — hotter than the Sun (5,778 K)

Estimated Age

3.09 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.100 R☉

Stellar Mass

1.070 M☉

Metallicity [Fe/H]

0.01

Extended Stellar Properties

Surface gravity (log g)

4.380 dex

Stellar density

1.709 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,201.82 parsec

Light-years 3,919.81 ly

V-band magnitude

15.83 mag

Voyager-speed travel 69,125,811 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.805 mas

Total Proper Motion

10.725 mas/yr

PM Right Ascension

-3.69 mas/yr

PM Declination

-10.07 mas/yr

Galactic Cartesian (pc)

x = 0.345 · y = -0.664 · z = 0.663

Equatorial (J2000)

RA 297.45213° · Dec 41.55808°

Galactic ℓ, b

75.978° · 7.741°

Ecliptic λ, β

314.964° · 60.782°

HTM-20 index

-855820136