Key parameters at a glance

A radius of 1.32 Earth radii
A mass of 2.30 Earth masses
Surface gravity around 1.32 g
An orbital period of 1.683 days
Semi-major axis 0.0219 AU
Equilibrium temperature 750 K (477 °C)
Distance from Earth 565.40 light-years
Earth Similarity Index 0.419
Travel time at Voyager 1 speed 9,970,907 years
Almost certainly tidally locked to its host star given the close orbit

Kepler-617 b Planet Profile

Physical Specs

Radius

1.32 R⊕

Radius (Jupiter)

0.118 R♃

Mass

2.30 M⊕

Mass (Jupiter)

0.007 M♃

Density

5.50 g/cm³

Surface Gravity

1.32 g (Earth)

Classification

Planet Type

Super-Earth

ESI Score 0.419

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

#1049of 1176

top 89.1%

This planet

1.32R⊕

Super-Earth median

1.60R⊕

Nearest-size peers

Kepler-1506 b 1.32 R⊕ Kepler-383 b 1.32 R⊕ Kepler-157 b 1.32 R⊕

Metric	Earth	Kepler-617 b	Jupiter
Radius (R⊕)	1.00	1.32	11.21
Mass (M⊕)	1.00	2.30	317.83
Density (g/cm³)	5.51	5.50	1.33
Surface Gravity (g)	1.00	1.32	2.53
Insolation (S⊕)	1.00	100.30	0.037

Star Catalogue Identifiers

TIC

TIC 164557035

Gaia DR2

Gaia DR2 2107607354856794880

Gaia DR3

Gaia DR3 2107607354856794880

System

Kepler-617

Percentile among Super-Earth cohort

Radius 1.320 R⊕ · percentile 9 / cohort 1176

Mass 2.300 M⊕ · percentile 9 / cohort 1176

Orbital period 1.68 d · percentile 10 / cohort 1164

Distance 173.35 pc · percentile 22 / cohort 1171

ESI 0.419 · percentile 64 / cohort 1176

Orbit & Habitability

Orbital Dynamics

Period

1.683 days

Semi-major axis

0.0219 AU

Eccentricity

0.000

Inclination

89.85 °

Year Length

A year here lasts approximately 1.68 Earth days (0.5% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0219 AU.

Transit Fingerprint

Depth

0.070 %

Duration

1.380 h

Impact parameter b

0.119

Rp / R★

0.024759

Transit midpoint (BJD)

2,455,003.4530

Photometric dip

Transit produces a flux drop of 704 ppm lasting ≈ 1.38 h.

Extended Orbital Architecture

Planet / star radius ratio

0.024759

Semi-major axis / stellar radius

9.507

Impact parameter (b)

0.119

Transit mid-time (BJD)

2,455,003.4530

Angular separation (arcsec)

0.12600

Eq. Temperature

750K

(477 °C)

Insolation (S⊕)

100.30

Earth = 1.00

Earth Similarity (ESI)

0.419

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water. Close-orbiting tidally-locked around a cool host.

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-617

Spectral Class

M-type red dwarf

Effective Temperature

3,712 K — cooler than the Sun (5,778 K)

Estimated Age

3.98 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.480 R☉

Stellar Mass

0.510 M☉

Metallicity [Fe/H]

-0.07

Extended Stellar Properties

Surface gravity (log g)

4.770 dex

Stellar density

4.722 g/cm³

Metallicity ratio

[Fe/H]

Distance

173.35 parsec

Light-years 565.40 ly

V-band magnitude

15.55 mag

Voyager-speed travel 9,970,907 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

5.740 mas

Total Proper Motion

37.659 mas/yr

PM Right Ascension

0.00 mas/yr

PM Declination

-37.66 mas/yr

Galactic Cartesian (pc)

x = 0.160 · y = -0.656 · z = 0.737

Equatorial (J2000)

RA 283.74072° · Dec 47.51612°

Galactic ℓ, b

77.322° · 19.089°

Ecliptic λ, β

297.466° · 69.648°

HTM-20 index

-922603980