Key parameters at a glance

A radius of 4.32 Earth radii
A mass of 79.40 Earth masses
Surface gravity around 4.25 g
An orbital period of 42.882 days
Semi-major axis 0.2624 AU
Equilibrium temperature 709 K (436 °C)
Distance from Earth 1,848.82 light-years
Earth Similarity Index 0.303
Travel time at Voyager 1 speed 32,603,856 years

1 sibling around Kepler-145

Kepler-145 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-145 b	Sub-Neptune	2.65	37.10	22.951	873	2013
Kepler-145 c this	Neptune-like	4.32	79.40	42.882	709	2013

Kepler-145 c Planet Profile

Physical Specs

Radius

4.32 R⊕

Radius (Jupiter)

0.385 R♃

Mass

79.40 M⊕

Mass (Jupiter)

0.250 M♃

Density

2.58 g/cm³

Surface Gravity

4.25 g (Earth)

Classification

Planet Type

Neptune-like

ESI Score 0.303

HZ Position Inner

Controversial No

Discovery

Year 2013

Method Transit

Facility Kepler

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#488of 574

top 84.8%

This planet

4.32R⊕

Neptune-like median

6.39R⊕

Nearest-size peers

KOI-94 c 4.32 R⊕ GJ 687 b 4.32 R⊕ CoRoT-7 d 4.31 R⊕

Metric	Earth	Kepler-145 c	Jupiter
Radius (R⊕)	1.00	4.32	11.21
Mass (M⊕)	1.00	79.40	317.83
Density (g/cm³)	5.51	2.58	1.33
Surface Gravity (g)	1.00	4.25	2.53
Insolation (S⊕)	1.00	67.19	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	79.400 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

TIC

TIC 159721091

Gaia DR2

Gaia DR2 2126237131982289280

Gaia DR3

Gaia DR3 2126237131982289280

System

Kepler-145

Percentile among Neptune-like cohort

Radius 4.320 R⊕ · percentile 15 / cohort 574

Mass 79.400 M⊕ · percentile 88 / cohort 574

Orbital period 42.88 d · percentile 68 / cohort 524

Distance 566.85 pc · percentile 59 / cohort 572

ESI 0.303 · percentile 50 / cohort 574

Orbit & Habitability

Orbital Dynamics

Period

42.882 days

Semi-major axis

0.2624 AU

Eccentricity

0.110

Inclination

89.29 °

Year Length

A year here lasts approximately 42.88 Earth days (11.7% of a terrestrial year) on a mildly elliptical path at a mean orbital distance of 0.2624 AU.

Transit Fingerprint

Depth

0.041 %

Duration

9.747 h

Impact parameter b

0.742

Rp / R★

0.019980

Transit midpoint (BJD)

2,455,036.6478

Photometric dip

Transit produces a flux drop of 409 ppm lasting ≈ 9.75 h.

Extended Orbital Architecture

Planet / star radius ratio

0.019980

Semi-major axis / stellar radius

23.170

Impact parameter (b)

0.742

Transit mid-time (BJD)

2,455,036.6478

Angular separation (arcsec)

0.46300

Eq. Temperature

709K

(436 °C)

Insolation (S⊕)

67.19

Earth = 1.00

Earth Similarity (ESI)

0.303

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water.

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

Xie 2014

Instrument

Kepler CCD Array

Publication

2014-02

Observation locale

Space

Discovery cohort

Planets confirmed in 2013 at Kepler (12 shown).

Kepler-69 c · Super-Earth Kepler-61 b · Sub-Neptune Kepler-62 e · Super-Earth KOI-351 f · Sub-Neptune Kepler-62 f · Super-Earth KOI-351 e · Sub-Neptune Kepler-1704 b · Gas Giant Kepler-37 d · Sub-Neptune Kepler-282 e · Sub-Neptune KOI-351 h · Gas Giant KOI-351 d · Sub-Neptune Kepler-114 c · Super-Earth

Host System: Kepler-145

Spectral Class

F-type yellow-white

Effective Temperature

6,022 K — hotter than the Sun (5,778 K)

Estimated Age

3.24 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.850 R☉

Stellar Mass

1.320 M☉

Metallicity [Fe/H]

0.00

Extended Stellar Properties

Surface gravity (log g)

4.020 dex

Stellar density

0.200 g/cm³

Systemic radial velocity

-26.09 km/s

Metallicity ratio

[M/H]

Distance

566.85 parsec

Light-years 1,848.82 ly

V-band magnitude

11.98 mag

Voyager-speed travel 32,603,856 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.736 mas

Total Proper Motion

12.157 mas/yr

PM Right Ascension

-2.76 mas/yr

PM Declination

-11.84 mas/yr

Galactic Cartesian (pc)

x = 0.260 · y = -0.664 · z = 0.701

Equatorial (J2000)

RA 291.38774° · Dec 44.52905°

Galactic ℓ, b

76.573° · 13.043°

Ecliptic λ, β

308.221° · 65.155°

HTM-20 index

561090173