Key parameters at a glance

A radius of 2.67 Earth radii
A mass of 7.61 Earth masses
Surface gravity around 1.07 g
An orbital period of 60.928 days
Semi-major axis 0.2868 AU
Equilibrium temperature 467 K (194 °C)
Distance from Earth 945.55 light-years
Earth Similarity Index 0.514
Travel time at Voyager 1 speed 16,674,757 years

Kepler-517 b Planet Profile

Physical Specs

Radius

2.67 R⊕

Radius (Jupiter)

0.238 R♃

Mass

7.61 M⊕

Mass (Jupiter)

0.024 M♃

Density

2.20 g/cm³

Surface Gravity

1.07 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.514

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

#904of 1978

top 45.7%

This planet

2.67R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-357 c 2.67 R⊕ Kepler-96 b 2.67 R⊕ K2-26 b 2.67 R⊕

Metric	Earth	Kepler-517 b	Jupiter
Radius (R⊕)	1.00	2.67	11.21
Mass (M⊕)	1.00	7.61	317.83
Density (g/cm³)	5.51	2.20	1.33
Surface Gravity (g)	1.00	1.07	2.53
Insolation (S⊕)	1.00	10.56	0.037

Star Catalogue Identifiers

TIC

TIC 138297129

Gaia DR2

Gaia DR2 2077409645964537472

Gaia DR3

Gaia DR3 2077409645964537472

System

Kepler-517

Percentile among Sub-Neptune cohort

Radius 2.670 R⊕ · percentile 53 / cohort 1978

Mass 7.610 M⊕ · percentile 49 / cohort 1978

Orbital period 60.93 d · percentile 89 / cohort 1946

Distance 289.91 pc · percentile 34 / cohort 1975

ESI 0.514 · percentile 72 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

60.928 days

Semi-major axis

0.2868 AU

Eccentricity

0.000

Inclination

89.99 °

Year Length

A year here lasts approximately 60.93 Earth days (16.7% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.2868 AU.

Transit Fingerprint

Depth

0.074 %

Duration

6.326 h

Impact parameter b

0.789

Rp / R★

0.024748

Transit midpoint (BJD)

2,455,006.3705

Photometric dip

Transit produces a flux drop of 744 ppm lasting ≈ 6.33 h.

Extended Orbital Architecture

Planet / star radius ratio

0.024748

Semi-major axis / stellar radius

75.319

Impact parameter (b)

0.789

Transit mid-time (BJD)

2,455,006.3705

Angular separation (arcsec)

0.98900

Eq. Temperature

467K

(194 °C)

Insolation (S⊕)

10.56

Earth = 1.00

Earth Similarity (ESI)

0.514

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-517

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,690 K — cooler than the Sun (5,778 K)

Estimated Age

6.31 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

0.980 R☉

Stellar Mass

0.950 M☉

Metallicity [Fe/H]

-0.06

Extended Stellar Properties

Surface gravity (log g)

4.430 dex

Stellar density

0.840 g/cm³

Systemic radial velocity

-73.48 km/s

Metallicity ratio

[Fe/H]

Distance

289.91 parsec

Light-years 945.55 ly

V-band magnitude

12.37 mag

Voyager-speed travel 16,674,757 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

3.421 mas

Total Proper Motion

44.699 mas/yr

PM Right Ascension

31.65 mas/yr

PM Declination

-31.56 mas/yr

Galactic Cartesian (pc)

x = 0.302 · y = -0.688 · z = 0.660

Equatorial (J2000)

RA 293.67551° · Dec 41.29521°

Galactic ℓ, b

74.376° · 10.104°

Ecliptic λ, β

309.281° · 61.544°

HTM-20 index

1415475576