Key parameters at a glance

A radius of 2.39 Earth radii
A mass of 6.30 Earth masses
Surface gravity around 1.10 g
An orbital period of 11.388 days
Semi-major axis 0.1060 AU
Equilibrium temperature 979 K (706 °C)
Distance from Earth 3,291.24 light-years
Earth Similarity Index 0.260
Travel time at Voyager 1 speed 58,041,018 years

1 sibling around Kepler-193

Kepler-193 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-193 b this	Sub-Neptune	2.39	6.30	11.388	979	2014
Kepler-193 c	Sub-Neptune	2.75	8.00	50.697	595	2014

Kepler-193 b Planet Profile

Physical Specs

Radius

2.39 R⊕

Radius (Jupiter)

0.213 R♃

Mass

6.30 M⊕

Mass (Jupiter)

0.020 M♃

Density

2.54 g/cm³

Surface Gravity

1.10 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.260

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

#1343of 1978

top 67.8%

This planet

2.39R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

TOI-1184 b 2.39 R⊕ Kepler-152 c 2.39 R⊕ Kepler-238 c 2.39 R⊕

Metric	Earth	Kepler-193 b	Jupiter
Radius (R⊕)	1.00	2.39	11.21
Mass (M⊕)	1.00	6.30	317.83
Density (g/cm³)	5.51	2.54	1.33
Surface Gravity (g)	1.00	1.10	2.53
Insolation (S⊕)	1.00	117.30	0.037

Star Catalogue Identifiers

TIC

TIC 272496083

Gaia DR2

Gaia DR2 2080334106374197376

Gaia DR3

Gaia DR3 2080334106374197376

System

Kepler-193

Percentile among Sub-Neptune cohort

Radius 2.390 R⊕ · percentile 31 / cohort 1978

Mass 6.300 M⊕ · percentile 30 / cohort 1978

Orbital period 11.39 d · percentile 39 / cohort 1946

Distance 1,009.10 pc · percentile 78 / cohort 1975

ESI 0.260 · percentile 19 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

11.388 days

Semi-major axis

0.1060 AU

Eccentricity

0.000

Inclination

89.40 °

Year Length

A year here lasts approximately 11.39 Earth days (3.1% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1060 AU.

Transit Fingerprint

Depth

0.046 %

Duration

3.618 h

Impact parameter b

0.120

Rp / R★

0.019680

Transit midpoint (BJD)

2,455,007.5512

Photometric dip

Transit produces a flux drop of 457 ppm lasting ≈ 3.62 h.

Extended Orbital Architecture

Planet / star radius ratio

0.019680

Semi-major axis / stellar radius

24.374

Impact parameter (b)

0.120

Transit mid-time (BJD)

2,455,007.5512

Angular separation (arcsec)

0.10500

Eq. Temperature

979K

(706 °C)

Insolation (S⊕)

117.30

Earth = 1.00

Earth Similarity (ESI)

0.260

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-193

Spectral Class

F-type yellow-white

Effective Temperature

6,335 K — hotter than the Sun (5,778 K)

Estimated Age

0.30 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.147 R☉

Stellar Mass

1.051 M☉

Metallicity [Fe/H]

0.00

Extended Stellar Properties

Surface gravity (log g)

4.403 dex

Stellar density

1.030 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,009.10 parsec

Light-years 3,291.24 ly

V-band magnitude

14.71 mag

Voyager-speed travel 58,041,018 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.963 mas

Total Proper Motion

2.948 mas/yr

PM Right Ascension

-0.85 mas/yr

PM Declination

-2.82 mas/yr

Galactic Cartesian (pc)

x = 0.307 · y = -0.615 · z = 0.726

Equatorial (J2000)

RA 296.49860° · Dec 46.57725°

Galactic ℓ, b

80.090° · 10.773°

Ecliptic λ, β

318.063° · 65.653°

HTM-20 index

-1901555536