Key parameters at a glance

A radius of 0.74 Earth radii
A mass of 0.48 Earth masses
Surface gravity around 0.88 g
An orbital period of 7.416 days
Semi-major axis 0.0660 AU
Equilibrium temperature 622 K (349 °C)
Distance from Earth 848.01 light-years
Earth Similarity Index 0.497
Travel time at Voyager 1 speed 14,954,578 years
Almost certainly tidally locked to its host star given the close orbit

1 sibling around Kepler-345

Kepler-345 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-345 b this	Rocky Terrestrial	0.74	0.48	7.416	622	2014
Kepler-345 c	Rocky Terrestrial	1.20	2.20	9.387	575	2014

Kepler-345 b Planet Profile

Physical Specs

Radius

0.74 R⊕

Radius (Jupiter)

0.066 R♃

Mass

0.48 M⊕

Mass (Jupiter)

0.002 M♃

Density

4.80 g/cm³

Surface Gravity

0.88 g (Earth)

Classification

Planet Type

Rocky Terrestrial

ESI Score 0.497

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

#514of 570

top 90.0%

This planet

0.74R⊕

Rocky Terrestrial median

1.01R⊕

Nearest-size peers

Kepler-1869 c 0.74 R⊕ Kepler-125 c 0.74 R⊕ Kepler-444 f 0.74 R⊕

Metric	Earth	Kepler-345 b	Jupiter
Radius (R⊕)	1.00	0.74	11.21
Mass (M⊕)	1.00	0.48	317.83
Density (g/cm³)	5.51	4.80	1.33
Surface Gravity (g)	1.00	0.88	2.53
Insolation (S⊕)	1.00	35.37	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	0.480 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

TIC

TIC 271546191

Gaia DR2

Gaia DR2 2080067749681845504

Gaia DR3

Gaia DR3 2080067749681845504

System

Kepler-345

Percentile among Rocky Terrestrial cohort

Radius 0.740 R⊕ · percentile 9 / cohort 570

Mass 0.480 M⊕ · percentile 16 / cohort 570

Orbital period 7.42 d · percentile 69 / cohort 567

Distance 260.00 pc · percentile 36 / cohort 566

ESI 0.497 · percentile 70 / cohort 570

Orbit & Habitability

Orbital Dynamics

Period

7.416 days

Semi-major axis

0.0660 AU

Eccentricity

0.000

Inclination

89.05 °

Year Length

A year here lasts approximately 7.42 Earth days (2.0% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0660 AU.

Transit Fingerprint

Depth

0.017 %

Duration

1.971 h

Impact parameter b

0.150

Rp / R★

0.011421

Transit midpoint (BJD)

2,454,970.8151

Photometric dip

Transit produces a flux drop of 167 ppm lasting ≈ 1.97 h.

Extended Orbital Architecture

Planet / star radius ratio

0.011421

Semi-major axis / stellar radius

27.610

Impact parameter (b)

0.150

Transit mid-time (BJD)

2,454,970.8151

Angular separation (arcsec)

0.25400

Eq. Temperature

622K

(349 °C)

Insolation (S⊕)

35.37

Earth = 1.00

Earth Similarity (ESI)

0.497

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water. Close-orbiting tidally-locked around a cool host.

Detection Signatures

Transit photometry

A transit dip has been observed from at least one telescope.

Transit timing variations

Gravitational interactions from neighbours have been detected.

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-345

Spectral Class

K-type orange

Effective Temperature

4,504 K — cooler than the Sun (5,778 K)

Estimated Age

2.75 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.623 R☉

Stellar Mass

0.610 M☉

Metallicity [Fe/H]

0.19

Extended Stellar Properties

Surface gravity (log g)

4.683 dex

Stellar density

1.960 g/cm³

Metallicity ratio

[M/H]

Distance

260.00 parsec

Light-years 848.01 ly

V-band magnitude

14.34 mag

Voyager-speed travel 14,954,578 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

2.759 mas

Total Proper Motion

11.620 mas/yr

PM Right Ascension

9.97 mas/yr

PM Declination

5.96 mas/yr

Galactic Cartesian (pc)

x = 0.296 · y = -0.629 · z = 0.719

Equatorial (J2000)

RA 295.22885° · Dec 45.97104°

Galactic ℓ, b

79.126° · 11.265°

Ecliptic λ, β

315.523° · 65.471°

HTM-20 index

-2000904125

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