Key parameters at a glance

A radius of 9.76 Earth radii
A mass of 68.70 Earth masses
Surface gravity around 0.72 g
An orbital period of 5.546 days
Semi-major axis 0.0780 AU
Equilibrium temperature 2,336 K (2063 °C)
Distance from Earth 2,763.52 light-years
Earth Similarity Index 0.050
Travel time at Voyager 1 speed 48,734,611 years

Kepler-1517 b Planet Profile

Physical Specs

Radius

9.76 R⊕

Radius (Jupiter)

0.871 R♃

Mass

68.70 M⊕

Mass (Jupiter)

0.216 M♃

Density

0.41 g/cm³

Surface Gravity

0.72 g (Earth)

Classification

Planet Type

Neptune-like

ESI Score 0.050

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

#19of 574

top 3.1%

This planet

9.76R⊕

Neptune-like median

6.39R⊕

Nearest-size peers

Kepler-688 b 9.76 R⊕ TOI-1859 b 9.75 R⊕ TOI-5573 b 9.75 R⊕

Metric	Earth	Kepler-1517 b	Jupiter
Radius (R⊕)	1.00	9.76	11.21
Mass (M⊕)	1.00	68.70	317.83
Density (g/cm³)	5.51	0.41	1.33
Surface Gravity (g)	1.00	0.72	2.53
Insolation (S⊕)	1.00	1,526.98	0.037

Star Catalogue Identifiers

TIC

TIC 158555987

Gaia DR2

Gaia DR2 2102974833192340224

Gaia DR3

Gaia DR3 2102974833192340224

System

Kepler-1517

Percentile among Neptune-like cohort

Radius 9.760 R⊕ · percentile 97 / cohort 574

Mass 68.700 M⊕ · percentile 85 / cohort 574

Orbital period 5.55 d · percentile 23 / cohort 524

Distance 847.30 pc · percentile 69 / cohort 572

ESI 0.050 · percentile 0 / cohort 574

Orbit & Habitability

Orbital Dynamics

Period

5.546 days

Semi-major axis

0.0780 AU

Eccentricity

0.000

Inclination

83.88 °

Year Length

A year here lasts approximately 5.55 Earth days (1.5% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0780 AU.

Transit Fingerprint

Depth

0.215 %

Duration

2.393 h

Impact parameter b

0.741

Rp / R★

0.045920

Transit midpoint (BJD)

2,454,966.5034

Photometric dip

Transit produces a flux drop of 2,149 ppm lasting ≈ 2.39 h.

Extended Orbital Architecture

Planet / star radius ratio

0.045920

Semi-major axis / stellar radius

8.460

Impact parameter (b)

0.741

Transit mid-time (BJD)

2,454,966.5034

Angular separation (arcsec)

0.09210

Eq. Temperature

2,336K

(2063 °C)

Insolation (S⊕)

1,526.98

Earth = 1.00

Earth Similarity (ESI)

0.050

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched.

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-1517

Spectral Class

F-type yellow-white

Effective Temperature

7,010 K — hotter than the Sun (5,778 K)

Estimated Age

1.38 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.950 R☉

Stellar Mass

1.580 M☉

Metallicity [Fe/H]

0.01

Extended Stellar Properties

Surface gravity (log g)

4.060 dex

Stellar density

0.320 g/cm³

Metallicity ratio

[Fe/H]

Distance

847.30 parsec

Light-years 2,763.52 ly

V-band magnitude

12.23 mag

Voyager-speed travel 48,734,611 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.152 mas

Total Proper Motion

0.924 mas/yr

PM Right Ascension

0.68 mas/yr

PM Declination

0.62 mas/yr

Galactic Cartesian (pc)

x = 0.223 · y = -0.694 · z = 0.684

Equatorial (J2000)

RA 287.80721° · Dec 43.18880°

Galactic ℓ, b

74.216° · 14.840°

Ecliptic λ, β

301.440° · 64.696°

HTM-20 index

-2106698841