Key parameters at a glance

A radius of 2.66 Earth radii
A mass of 7.56 Earth masses
Surface gravity around 1.07 g
An orbital period of 6.511 days
Semi-major axis 0.0710 AU
Equilibrium temperature 1,008 K (735 °C)
Distance from Earth 3,209.72 light-years
Earth Similarity Index 0.242
Travel time at Voyager 1 speed 56,603,365 years

1 sibling around Kepler-346

Kepler-346 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-346 b this	Sub-Neptune	2.66	7.56	6.511	1,008	2014
Kepler-346 c	Sub-Neptune	3.07	9.64	23.852	654	2014

Kepler-346 b Planet Profile

Physical Specs

Radius

2.66 R⊕

Radius (Jupiter)

0.237 R♃

Mass

7.56 M⊕

Mass (Jupiter)

0.024 M♃

Density

2.21 g/cm³

Surface Gravity

1.07 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.242

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

#928of 1978

top 46.9%

This planet

2.66R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-1987 d 2.66 R⊕ KOI-351 e 2.66 R⊕ Kepler-1110 b 2.66 R⊕

Metric	Earth	Kepler-346 b	Jupiter
Radius (R⊕)	1.00	2.66	11.21
Mass (M⊕)	1.00	7.56	317.83
Density (g/cm³)	5.51	2.21	1.33
Surface Gravity (g)	1.00	1.07	2.53
Insolation (S⊕)	1.00	134.36	0.037

Star Catalogue Identifiers

TIC

TIC 158660363

Gaia DR2

Gaia DR2 2130363259822710272

Gaia DR3

Gaia DR3 2130363259822710272

System

Kepler-346

Percentile among Sub-Neptune cohort

Radius 2.660 R⊕ · percentile 52 / cohort 1978

Mass 7.560 M⊕ · percentile 48 / cohort 1978

Orbital period 6.51 d · percentile 20 / cohort 1946

Distance 984.11 pc · percentile 77 / cohort 1975

ESI 0.242 · percentile 15 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

6.511 days

Semi-major axis

0.0710 AU

Eccentricity

0.000

Inclination

86.75 °

Year Length

A year here lasts approximately 6.51 Earth days (1.8% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0710 AU.

Transit Fingerprint

Depth

0.070 %

Duration

1.509 h

Impact parameter b

0.320

Rp / R★

0.024817

Transit midpoint (BJD)

2,454,964.7057

Photometric dip

Transit produces a flux drop of 695 ppm lasting ≈ 1.51 h.

Extended Orbital Architecture

Planet / star radius ratio

0.024817

Semi-major axis / stellar radius

12.100

Impact parameter (b)

0.320

Transit mid-time (BJD)

2,454,964.7057

Angular separation (arcsec)

0.07210

Eq. Temperature

1,008K

(735 °C)

Insolation (S⊕)

134.36

Earth = 1.00

Earth Similarity (ESI)

0.242

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-346

Spectral Class

F-type yellow-white

Effective Temperature

6,033 K — hotter than the Sun (5,778 K)

Estimated Age

2.40 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.021 R☉

Stellar Mass

0.943 M☉

Metallicity [Fe/H]

0.10

Extended Stellar Properties

Surface gravity (log g)

4.464 dex

Stellar density

1.390 g/cm³

Metallicity ratio

[Fe/H]

Distance

984.11 parsec

Light-years 3,209.72 ly

V-band magnitude

15.26 mag

Voyager-speed travel 56,603,365 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.988 mas

Total Proper Motion

0.773 mas/yr

PM Right Ascension

0.46 mas/yr

PM Declination

0.62 mas/yr

Galactic Cartesian (pc)

x = 0.214 · y = -0.659 · z = 0.721

Equatorial (J2000)

RA 288.01192° · Dec 46.11760°

Galactic ℓ, b

77.068° · 15.858°

Ecliptic λ, β

303.968° · 67.444°

HTM-20 index

1687984669