Key parameters at a glance

A radius of 1.53 Earth radii
A mass of 2.96 Earth masses
Surface gravity around 1.26 g
An orbital period of 12.611 days
Semi-major axis 0.1130 AU
Equilibrium temperature 953 K (680 °C)
Distance from Earth 3,398.61 light-years
Earth Similarity Index 0.313
Travel time at Voyager 1 speed 59,934,497 years

1 sibling around Kepler-147

Kepler-147 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-147 b this	Super-Earth	1.53	2.96	12.611	953	2014
Kepler-147 c	Sub-Neptune	2.43	6.48	33.416	689	2014

Kepler-147 b Planet Profile

Physical Specs

Radius

1.53 R⊕

Radius (Jupiter)

0.136 R♃

Mass

2.96 M⊕

Mass (Jupiter)

0.009 M♃

Density

4.54 g/cm³

Surface Gravity

1.26 g (Earth)

Classification

Planet Type

Super-Earth

ESI Score 0.313

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

#687of 1176

top 58.3%

This planet

1.53R⊕

Super-Earth median

1.60R⊕

Nearest-size peers

Kepler-296 e 1.53 R⊕ Kepler-228 b 1.53 R⊕ Kepler-54 d 1.53 R⊕

Metric	Earth	Kepler-147 b	Jupiter
Radius (R⊕)	1.00	1.53	11.21
Mass (M⊕)	1.00	2.96	317.83
Density (g/cm³)	5.51	4.54	1.33
Surface Gravity (g)	1.00	1.26	2.53
Insolation (S⊕)	1.00	224.61	0.037

Star Catalogue Identifiers

TIC

TIC 121458206

Gaia DR2

Gaia DR2 2099686125195464576

Gaia DR3

Gaia DR3 2099686125195464576

System

Kepler-147

Percentile among Super-Earth cohort

Radius 1.530 R⊕ · percentile 40 / cohort 1176

Mass 2.960 M⊕ · percentile 37 / cohort 1176

Orbital period 12.61 d · percentile 71 / cohort 1164

Distance 1,042.02 pc · percentile 82 / cohort 1171

ESI 0.313 · percentile 40 / cohort 1176

Orbit & Habitability

Orbital Dynamics

Period

12.611 days

Semi-major axis

0.1130 AU

Eccentricity

0.000

Inclination

86.26 °

Year Length

A year here lasts approximately 12.61 Earth days (3.5% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1130 AU.

Transit Fingerprint

Depth

0.008 %

Duration

4.448 h

Impact parameter b

0.510

Rp / R★

0.008559

Transit midpoint (BJD)

2,454,971.1902

Photometric dip

Transit produces a flux drop of 77 ppm lasting ≈ 4.45 h.

Extended Orbital Architecture

Planet / star radius ratio

0.008559

Semi-major axis / stellar radius

10.500

Impact parameter (b)

0.510

Transit mid-time (BJD)

2,454,971.1902

Angular separation (arcsec)

0.10800

Eq. Temperature

953K

(680 °C)

Insolation (S⊕)

224.61

Earth = 1.00

Earth Similarity (ESI)

0.313

0 = alien, 1 = Earth-identical

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

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-147

Spectral Class

F-type yellow-white

Effective Temperature

6,012 K — hotter than the Sun (5,778 K)

Estimated Age

5.50 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

1.468 R☉

Stellar Mass

1.145 M☉

Metallicity [Fe/H]

0.10

Extended Stellar Properties

Surface gravity (log g)

4.182 dex

Stellar density

0.340 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,042.02 parsec

Light-years 3,398.61 ly

V-band magnitude

14.13 mag

Voyager-speed travel 59,934,497 yr

Multi-band Host Photometry — 17 bands

Astrometric Data

Parallax

0.931 mas

Total Proper Motion

8.147 mas/yr

PM Right Ascension

-7.37 mas/yr

PM Declination

-3.47 mas/yr

Galactic Cartesian (pc)

x = 0.240 · y = -0.738 · z = 0.631

Equatorial (J2000)

RA 287.97572° · Dec 39.08717°

Galactic ℓ, b

70.408° · 13.056°

Ecliptic λ, β

299.312° · 60.710°

HTM-20 index

-720953842