Key parameters at a glance

A radius of 1.20 Earth radii
A mass of 1.87 Earth masses
Surface gravity around 1.30 g
An orbital period of 27.479 days
Semi-major axis 0.1771 AU
Equilibrium temperature 736 K (463 °C)
Distance from Earth 2,929.89 light-years
Earth Similarity Index 0.429
Travel time at Voyager 1 speed 51,668,642 years

Kepler-1617 b Planet Profile

Physical Specs

Radius

1.20 R⊕

Radius (Jupiter)

0.107 R♃

Mass

1.87 M⊕

Mass (Jupiter)

0.006 M♃

Density

5.95 g/cm³

Surface Gravity

1.30 g (Earth)

Classification

Planet Type

Rocky Terrestrial

ESI Score 0.429

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

#75of 570

top 13.0%

This planet

1.20R⊕

Rocky Terrestrial median

1.01R⊕

Nearest-size peers

Kepler-225 b 1.20 R⊕ Kepler-282 c 1.20 R⊕ Kepler-367 c 1.20 R⊕

Metric	Earth	Kepler-1617 b	Jupiter
Radius (R⊕)	1.00	1.20	11.21
Mass (M⊕)	1.00	1.87	317.83
Density (g/cm³)	5.51	5.95	1.33
Surface Gravity (g)	1.00	1.30	2.53
Insolation (S⊕)	1.00	64.69	0.037

Star Catalogue Identifiers

TIC

TIC 158625761

Gaia DR2

Gaia DR2 2130376453962481024

Gaia DR3

Gaia DR3 2130376453962481024

System

Kepler-1617

Percentile among Rocky Terrestrial cohort

Radius 1.200 R⊕ · percentile 84 / cohort 570

Mass 1.870 M⊕ · percentile 77 / cohort 570

Orbital period 27.48 d · percentile 96 / cohort 567

Distance 898.31 pc · percentile 91 / cohort 566

ESI 0.429 · percentile 63 / cohort 570

Orbit & Habitability

Orbital Dynamics

Period

27.479 days

Semi-major axis

0.1771 AU

Eccentricity

0.000

Inclination

89.98 °

Year Length

A year here lasts approximately 27.48 Earth days (7.5% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1771 AU.

Transit Fingerprint

Depth

0.009 %

Duration

8.305 h

Impact parameter b

0.008

Rp / R★

0.008813

Transit midpoint (BJD)

2,454,981.6285

Photometric dip

Transit produces a flux drop of 89 ppm lasting ≈ 8.31 h.

Extended Orbital Architecture

Planet / star radius ratio

0.008813

Semi-major axis / stellar radius

23.120

Impact parameter (b)

0.008

Transit mid-time (BJD)

2,454,981.6285

Angular separation (arcsec)

0.19700

Eq. Temperature

736K

(463 °C)

Insolation (S⊕)

64.69

Earth = 1.00

Earth Similarity (ESI)

0.429

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-1617

Spectral Class

F-type yellow-white

Effective Temperature

6,167 K — hotter than the Sun (5,778 K)

Estimated Age

3.02 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.220 R☉

Stellar Mass

1.150 M☉

Metallicity [Fe/H]

0.01

Extended Stellar Properties

Surface gravity (log g)

4.320 dex

Stellar density

0.390 g/cm³

Metallicity ratio

[Fe/H]

Distance

898.31 parsec

Light-years 2,929.89 ly

V-band magnitude

13.81 mag

Voyager-speed travel 51,668,642 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.084 mas

Total Proper Motion

6.363 mas/yr

PM Right Ascension

-6.00 mas/yr

PM Declination

-2.13 mas/yr

Galactic Cartesian (pc)

x = 0.212 · y = -0.656 · z = 0.724

Equatorial (J2000)

RA 287.93717° · Dec 46.41848°

Galactic ℓ, b

77.335° · 16.022°

Ecliptic λ, β

304.094° · 67.746°

HTM-20 index

-1716143479