Key parameters at a glance

A radius of 1.99 Earth radii
A mass of 4.62 Earth masses
Surface gravity around 1.17 g
An orbital period of 7.234 days
Semi-major axis 0.0720 AU
Equilibrium temperature 831 K (558 °C)
Distance from Earth 1,800.57 light-years
Earth Similarity Index 0.331
Travel time at Voyager 1 speed 31,753,055 years

Kepler-1017 b Planet Profile

Physical Specs

Radius

1.99 R⊕

Radius (Jupiter)

0.178 R♃

Mass

4.62 M⊕

Mass (Jupiter)

0.015 M♃

Density

3.22 g/cm³

Surface Gravity

1.17 g (Earth)

Classification

Planet Type

Super-Earth

ESI Score 0.331

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

#4of 1176

top 0.3%

This planet

1.99R⊕

Super-Earth median

1.60R⊕

Nearest-size peers

K2-62 c 1.99 R⊕ Kepler-136 c 1.99 R⊕ Kepler-243 c 1.99 R⊕

Metric	Earth	Kepler-1017 b	Jupiter
Radius (R⊕)	1.00	1.99	11.21
Mass (M⊕)	1.00	4.62	317.83
Density (g/cm³)	5.51	3.22	1.33
Surface Gravity (g)	1.00	1.17	2.53
Insolation (S⊕)	1.00	119.60	0.037

Star Catalogue Identifiers

TIC

TIC 237188153

Gaia DR2

Gaia DR2 2103516759284836992

Gaia DR3

Gaia DR3 2103516759284836992

System

Kepler-1017

Percentile among Super-Earth cohort

Radius 1.990 R⊕ · percentile 98 / cohort 1176

Mass 4.620 M⊕ · percentile 90 / cohort 1176

Orbital period 7.23 d · percentile 54 / cohort 1164

Distance 552.06 pc · percentile 50 / cohort 1171

ESI 0.331 · percentile 45 / cohort 1176

Orbit & Habitability

Orbital Dynamics

Period

7.234 days

Semi-major axis

0.0720 AU

Eccentricity

0.000

Inclination

89.93 °

Year Length

A year here lasts approximately 7.23 Earth days (2.0% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0720 AU.

Transit Fingerprint

Depth

0.049 %

Duration

2.165 h

Impact parameter b

0.032

Rp / R★

0.021247

Transit midpoint (BJD)

2,454,970.6773

Photometric dip

Transit produces a flux drop of 492 ppm lasting ≈ 2.16 h.

Extended Orbital Architecture

Planet / star radius ratio

0.021247

Semi-major axis / stellar radius

26.010

Impact parameter (b)

0.032

Transit mid-time (BJD)

2,454,970.6773

Angular separation (arcsec)

0.13000

Eq. Temperature

831K

(558 °C)

Insolation (S⊕)

119.60

Earth = 1.00

Earth Similarity (ESI)

0.331

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-1017

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,473 K — cooler than the Sun (5,778 K)

Estimated Age

2.95 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.870 R☉

Stellar Mass

0.930 M☉

Metallicity [Fe/H]

0.04

Extended Stellar Properties

Surface gravity (log g)

4.530 dex

Stellar density

1.490 g/cm³

Metallicity ratio

[Fe/H]

Distance

552.06 parsec

Light-years 1,800.57 ly

V-band magnitude

14.32 mag

Voyager-speed travel 31,753,055 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.783 mas

Total Proper Motion

16.862 mas/yr

PM Right Ascension

-6.63 mas/yr

PM Declination

-15.50 mas/yr

Galactic Cartesian (pc)

x = 0.178 · y = -0.744 · z = 0.645

Equatorial (J2000)

RA 283.46930° · Dec 40.13252°

Galactic ℓ, b

69.992° · 16.658°

Ecliptic λ, β

292.693° · 62.515°

HTM-20 index

-54843237