Key parameters at a glance

A radius of 2.53 Earth radii
A mass of 6.94 Earth masses
Surface gravity around 1.08 g
An orbital period of 14.844 days
Semi-major axis 0.1340 AU
Equilibrium temperature 1,092 K (819 °C)
Distance from Earth 2,637.83 light-years
Earth Similarity Index 0.226
Travel time at Voyager 1 speed 46,518,055 years

1 sibling around Kepler-340

Kepler-340 b 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-340 b this	Sub-Neptune	2.53	6.94	14.844	1,092	2014
Kepler-340 c	Sub-Neptune	3.37	11.30	22.825	946	2014

Kepler-340 b Planet Profile

Physical Specs

Radius

2.53 R⊕

Radius (Jupiter)

0.226 R♃

Mass

6.94 M⊕

Mass (Jupiter)

0.022 M♃

Density

2.35 g/cm³

Surface Gravity

1.08 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.226

HZ Position Inner

Controversial No

Discovery

Year 2014

Method Transit

Facility Kepler

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#1133of 1978

top 57.2%

This planet

2.53R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-896 b 2.53 R⊕ Kepler-313 b 2.53 R⊕ TOI-1136 g 2.53 R⊕

Metric	Earth	Kepler-340 b	Jupiter
Radius (R⊕)	1.00	2.53	11.21
Mass (M⊕)	1.00	6.94	317.83
Density (g/cm³)	5.51	2.35	1.33
Surface Gravity (g)	1.00	1.08	2.53
Insolation (S⊕)	1.00	274.32	0.037

Star Catalogue Identifiers

TIC

TIC 184247532

Gaia DR2

Gaia DR2 2076383625510685824

Gaia DR3

Gaia DR3 2076383625510685824

System

Kepler-340

Percentile among Sub-Neptune cohort

Radius 2.530 R⊕ · percentile 42 / cohort 1978

Mass 6.940 M⊕ · percentile 39 / cohort 1978

Orbital period 14.84 d · percentile 50 / cohort 1946

Distance 808.76 pc · percentile 66 / cohort 1975

ESI 0.226 · percentile 11 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

14.844 days

Semi-major axis

0.1340 AU

Eccentricity

0.000

Inclination

89.54 °

Year Length

A year here lasts approximately 14.84 Earth days (4.1% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1340 AU.

Transit Fingerprint

Depth

0.018 %

Duration

5.626 h

Impact parameter b

0.310

Rp / R★

0.013293

Transit midpoint (BJD)

2,454,976.5829

Photometric dip

Transit produces a flux drop of 178 ppm lasting ≈ 5.63 h.

Extended Orbital Architecture

Planet / star radius ratio

0.013293

Semi-major axis / stellar radius

16.560

Impact parameter (b)

0.310

Transit mid-time (BJD)

2,454,976.5829

Angular separation (arcsec)

0.16600

Eq. Temperature

1,092K

(819 °C)

Insolation (S⊕)

274.32

Earth = 1.00

Earth Similarity (ESI)

0.226

0 = alien, 1 = Earth-identical

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

Discovery Paper

Primary reference

Rowe et al. 2014

Instrument

Kepler CCD Array

Publication

2014-03

Observation locale

Space

Discovery cohort

Planets confirmed in 2014 at Kepler (12 shown).

Kepler-186 e · Super-Earth Kepler-395 c · Super-Earth Kepler-220 e · Super-Earth Kepler-249 d · Super-Earth Kepler-296 f · Super-Earth Kepler-367 c · Rocky Terrestrial Kepler-296 e · Super-Earth Kepler-155 c · Sub-Neptune Kepler-138 d · Super-Earth Kepler-333 c · Rocky Terrestrial Kepler-331 d · Super-Earth Kepler-267 d · Sub-Neptune

Host System: Kepler-340

Spectral Class

F-type yellow-white

Effective Temperature

6,620 K — hotter than the Sun (5,778 K)

Estimated Age

1.29 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.850 R☉

Stellar Mass

1.650 M☉

Metallicity [Fe/H]

0.06

Extended Stellar Properties

Surface gravity (log g)

4.063 dex

Stellar density

0.621 g/cm³

Metallicity ratio

[Fe/H]

Distance

808.76 parsec

Light-years 2,637.83 ly

V-band magnitude

12.33 mag

Voyager-speed travel 46,518,055 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.209 mas

Total Proper Motion

1.252 mas/yr

PM Right Ascension

0.06 mas/yr

PM Declination

-1.25 mas/yr

Galactic Cartesian (pc)

x = 0.334 · y = -0.686 · z = 0.647

Equatorial (J2000)

RA 295.93347° · Dec 40.30055°

Galactic ℓ, b

74.304° · 8.128°

Ecliptic λ, β

311.876° · 60.025°

HTM-20 index

-1522982276