Key parameters at a glance

A radius of 2.82 Earth radii
A mass of 8.35 Earth masses
Surface gravity around 1.05 g
An orbital period of 20.834 days
Semi-major axis 0.1483 AU
Equilibrium temperature 595 K (322 °C)
Distance from Earth 2,989.89 light-years
Earth Similarity Index 0.404
Travel time at Voyager 1 speed 52,726,736 years

Kepler-733 b Planet Profile

Physical Specs

Radius

2.82 R⊕

Radius (Jupiter)

0.252 R♃

Mass

8.35 M⊕

Mass (Jupiter)

0.026 M♃

Density

2.05 g/cm³

Surface Gravity

1.05 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.404

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

#720of 1978

top 36.3%

This planet

2.82R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-281 b 2.82 R⊕ Kepler-198 b 2.82 R⊕ Kepler-722 c 2.82 R⊕

Metric	Earth	Kepler-733 b	Jupiter
Radius (R⊕)	1.00	2.82	11.21
Mass (M⊕)	1.00	8.35	317.83
Density (g/cm³)	5.51	2.05	1.33
Surface Gravity (g)	1.00	1.05	2.53
Insolation (S⊕)	1.00	24.51	0.037

Star Catalogue Identifiers

TIC

TIC 240179452

Gaia DR2

Gaia DR2 2128047069862606208

Gaia DR3

Gaia DR3 2128047069862606208

System

Kepler-733

Percentile among Sub-Neptune cohort

Radius 2.820 R⊕ · percentile 63 / cohort 1978

Mass 8.350 M⊕ · percentile 58 / cohort 1978

Orbital period 20.83 d · percentile 64 / cohort 1946

Distance 916.71 pc · percentile 73 / cohort 1975

ESI 0.404 · percentile 53 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

20.834 days

Semi-major axis

0.1483 AU

Eccentricity

0.000

Inclination

89.63 °

Year Length

A year here lasts approximately 20.83 Earth days (5.7% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1483 AU.

Transit Fingerprint

Depth

0.099 %

Duration

4.075 h

Impact parameter b

0.256

Rp / R★

0.029888

Transit midpoint (BJD)

2,455,009.5857

Photometric dip

Transit produces a flux drop of 988 ppm lasting ≈ 4.07 h.

Extended Orbital Architecture

Planet / star radius ratio

0.029888

Semi-major axis / stellar radius

39.200

Impact parameter (b)

0.256

Transit mid-time (BJD)

2,455,009.5857

Angular separation (arcsec)

0.16200

Eq. Temperature

595K

(322 °C)

Insolation (S⊕)

24.51

Earth = 1.00

Earth Similarity (ESI)

0.404

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

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-733

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,418 K — cooler than the Sun (5,778 K)

Estimated Age

4.27 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.860 R☉

Stellar Mass

0.900 M☉

Metallicity [Fe/H]

0.01

Extended Stellar Properties

Surface gravity (log g)

4.530 dex

Stellar density

2.625 g/cm³

Metallicity ratio

[Fe/H]

Distance

916.71 parsec

Light-years 2,989.89 ly

V-band magnitude

15.56 mag

Voyager-speed travel 52,726,736 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.063 mas

Total Proper Motion

12.643 mas/yr

PM Right Ascension

-12.64 mas/yr

PM Declination

-0.18 mas/yr

Galactic Cartesian (pc)

x = 0.272 · y = -0.640 · z = 0.718

Equatorial (J2000)

RA 293.01819° · Dec 45.91471°

Galactic ℓ, b

78.364° · 12.611°

Ecliptic λ, β

312.031° · 66.028°

HTM-20 index

-1376845246