Key parameters at a glance

A radius of 2.18 Earth radii
A mass of 5.39 Earth masses
Surface gravity around 1.13 g
An orbital period of 9.468 days
Semi-major axis 0.0691 AU
Equilibrium temperature 407 K (134 °C)
Distance from Earth 570.21 light-years
Earth Similarity Index 0.623
Travel time at Voyager 1 speed 10,055,573 years
Almost certainly tidally locked to its host star given the close orbit

1 sibling around Kepler-732

Kepler-732 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-732 c	Super-Earth	1.27	2.15	0.893	893	2016
Kepler-732 b this	Sub-Neptune	2.18	5.39	9.468	407	2016

Kepler-732 b Planet Profile

Physical Specs

Radius

2.18 R⊕

Radius (Jupiter)

0.194 R♃

Mass

5.39 M⊕

Mass (Jupiter)

0.017 M♃

Density

2.86 g/cm³

Surface Gravity

1.13 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.623

HZ Position Inner

Controversial No

Discovery

Year 2016

Method Transit

Facility Kepler

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#1703of 1978

top 86.0%

This planet

2.18R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

GJ 3090 b 2.18 R⊕ Kepler-261 b 2.18 R⊕ Kepler-250 d 2.18 R⊕

Metric	Earth	Kepler-732 b	Jupiter
Radius (R⊕)	1.00	2.18	11.21
Mass (M⊕)	1.00	5.39	317.83
Density (g/cm³)	5.51	2.86	1.33
Surface Gravity (g)	1.00	1.13	2.53
Insolation (S⊕)	1.00	8.56	0.037

Star Catalogue Identifiers

TIC

TIC 164555597

Gaia DR2

Gaia DR2 2107406178588473728

Gaia DR3

Gaia DR3 2107406178588473728

System

Kepler-732

Percentile among Sub-Neptune cohort

Radius 2.180 R⊕ · percentile 13 / cohort 1978

Mass 5.390 M⊕ · percentile 14 / cohort 1978

Orbital period 9.47 d · percentile 31 / cohort 1946

Distance 174.83 pc · percentile 27 / cohort 1975

ESI 0.623 · percentile 85 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

9.468 days

Semi-major axis

0.0691 AU

Eccentricity

0.000

Inclination

89.85 °

Year Length

A year here lasts approximately 9.47 Earth days (2.6% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0691 AU.

Transit Fingerprint

Depth

0.224 %

Duration

2.444 h

Impact parameter b

0.081

Rp / R★

0.043323

Transit midpoint (BJD)

2,455,011.4165

Photometric dip

Transit produces a flux drop of 2,237 ppm lasting ≈ 2.44 h.

Extended Orbital Architecture

Planet / star radius ratio

0.043323

Semi-major axis / stellar radius

30.870

Impact parameter (b)

0.081

Transit mid-time (BJD)

2,455,011.4165

Angular separation (arcsec)

0.39500

Eq. Temperature

407K

(134 °C)

Insolation (S⊕)

8.56

Earth = 1.00

Earth Similarity (ESI)

0.623

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.

Discovery Paper

Primary reference

Morton et al. 2016

Instrument

Kepler CCD Array

Publication

2016-05

Observation locale

Space

Discovery cohort

Planets confirmed in 2016 at Kepler (12 shown).

Kepler-1512 b · Rocky Terrestrial Kepler-1410 b · Super-Earth Kepler-560 b · Super-Earth Kepler-1389 b · Super-Earth Kepler-1450 b · Super-Earth Kepler-1544 b · Super-Earth Kepler-1459 b · Super-Earth Kepler-1638 b · Super-Earth Kepler-737 b · Super-Earth Kepler-1185 b · Super-Earth Kepler-1178 b · Rocky Terrestrial Kepler-1040 b · Sub-Neptune

Host System: Kepler-732

Spectral Class

M-type red dwarf

Effective Temperature

3,631 K — cooler than the Sun (5,778 K)

Estimated Age

4.47 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.460 R☉

Stellar Mass

0.490 M☉

Metallicity [Fe/H]

-0.01

Extended Stellar Properties

Surface gravity (log g)

4.790 dex

Stellar density

5.141 g/cm³

Metallicity ratio

[Fe/H]

Distance

174.83 parsec

Light-years 570.21 ly

V-band magnitude

16.53 mag

Voyager-speed travel 10,055,573 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

5.691 mas

Total Proper Motion

66.815 mas/yr

PM Right Ascension

-41.14 mas/yr

PM Declination

-52.65 mas/yr

Galactic Cartesian (pc)

x = 0.165 · y = -0.675 · z = 0.719

Equatorial (J2000)

RA 283.73173° · Dec 45.95853°

Galactic ℓ, b

75.772° · 18.564°

Ecliptic λ, β

296.313° · 68.147°

HTM-20 index

325038288