Key parameters at a glance

A radius of 2.90 Earth radii
A mass of 8.75 Earth masses
Surface gravity around 1.04 g
An orbital period of 9.631 days
Semi-major axis 0.0905 AU
Equilibrium temperature 1,094 K (821 °C)
Distance from Earth 2,946.85 light-years
Earth Similarity Index 0.214
Travel time at Voyager 1 speed 51,967,733 years

1 sibling around Kepler-1518

Kepler-1518 c shares its host star with 1 other confirmed planet. Side-by-side measurements below.

Planet	Type	Radius (R⊕)	Mass (M⊕)	Period (d)	Eq. T (K)	Year
Kepler-1518 b	Sub-Neptune	3.05	9.53	5.112	1,351	2016
Kepler-1518 c this	Sub-Neptune	2.90	8.75	9.631	1,094	2023

Kepler-1518 c Planet Profile

Physical Specs

Radius

2.90 R⊕

Radius (Jupiter)

0.259 R♃

Mass

8.75 M⊕

Mass (Jupiter)

0.028 M♃

Density

1.97 g/cm³

Surface Gravity

1.04 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.214

HZ Position Inner

Controversial No

Discovery

Year 2023

Method Transit

Facility Kepler

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#621of 1978

top 31.3%

This planet

2.90R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-130 c 2.90 R⊕ Kepler-276 c 2.90 R⊕ Kepler-314 c 2.90 R⊕

Metric	Earth	Kepler-1518 c	Jupiter
Radius (R⊕)	1.00	2.90	11.21
Mass (M⊕)	1.00	8.75	317.83
Density (g/cm³)	5.51	1.97	1.33
Surface Gravity (g)	1.00	1.04	2.53
Insolation (S⊕)	1.00	338.33	0.037

Star Catalogue Identifiers

TIC

TIC 239289191

Gaia DR2

Gaia DR2 2082161219824397568

Gaia DR3

Gaia DR3 2082161219824397568

System

Kepler-1518

Percentile among Sub-Neptune cohort

Radius 2.900 R⊕ · percentile 68 / cohort 1978

Mass 8.750 M⊕ · percentile 62 / cohort 1978

Orbital period 9.63 d · percentile 32 / cohort 1946

Distance 903.51 pc · percentile 72 / cohort 1975

ESI 0.214 · percentile 9 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

9.631 days

Semi-major axis

0.0905 AU

Eccentricity

0.000

Inclination

79.56 °

Year Length

A year here lasts approximately 9.63 Earth days (2.6% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0905 AU.

Transit Fingerprint

Depth

0.030 %

Duration

5.255 h

Impact parameter b

0.951

Rp / R★

0.019733

Transit midpoint (BJD)

2,454,965.7273

Photometric dip

Transit produces a flux drop of 297 ppm lasting ≈ 5.26 h.

Extended Orbital Architecture

Planet / star radius ratio

0.019733

Semi-major axis / stellar radius

5.250

Impact parameter (b)

0.951

Transit mid-time (BJD)

2,454,965.7273

Angular separation (arcsec)

0.10000

Eq. Temperature

1,094K

(821 °C)

Insolation (S⊕)

338.33

Earth = 1.00

Earth Similarity (ESI)

0.214

0 = alien, 1 = Earth-identical

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

Discovery Paper

Primary reference

Valizadegan et al. 2023

Instrument

Kepler CCD Array

Publication

2023-05

Observation locale

Space

Discovery cohort

Planets confirmed in 2023 at Kepler (12 shown).

Kepler-1126 c · Super-Earth Kepler-2000 c · Super-Earth Kepler-1052 c · Sub-Neptune Kepler-311 d · Sub-Neptune Kepler-1996 c · Sub-Neptune Kepler-1162 c · Super-Earth Kepler-1996 b · Sub-Neptune Kepler-1610 c · Sub-Neptune Kepler-1801 c · Sub-Neptune Kepler-1995 b · Neptune-like Kepler-1992 b · Rocky Terrestrial Kepler-1986 b · Super-Earth

Host System: Kepler-1518

Spectral Class

F-type yellow-white

Effective Temperature

6,432 K — hotter than the Sun (5,778 K)

Estimated Age

1.48 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.345 R☉

Stellar Mass

1.060 M☉

Metallicity [Fe/H]

-0.34

Extended Stellar Properties

Surface gravity (log g)

4.207 dex

Stellar density

0.029 g/cm³

Metallicity ratio

[Fe/H]

Distance

903.51 parsec

Light-years 2,946.85 ly

V-band magnitude

13.37 mag

Voyager-speed travel 51,967,733 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.078 mas

Total Proper Motion

10.736 mas/yr

PM Right Ascension

-6.62 mas/yr

PM Declination

-8.45 mas/yr

Galactic Cartesian (pc)

x = 0.357 · y = -0.610 · z = 0.707

Equatorial (J2000)

RA 300.33234° · Dec 44.98611°

Galactic ℓ, b

80.032° · 7.663°

Ecliptic λ, β

322.014° · 63.053°

HTM-20 index

-1183964363