Key parameters at a glance

A radius of 2.75 Earth radii
A mass of 8.00 Earth masses
Surface gravity around 1.06 g
An orbital period of 50.697 days
Semi-major axis 0.2860 AU
Equilibrium temperature 595 K (322 °C)
Distance from Earth 3,291.24 light-years
Earth Similarity Index 0.408
Travel time at Voyager 1 speed 58,041,018 years

1 sibling around Kepler-193

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

Kepler-193 c Planet Profile

Physical Specs

Radius

2.75 R⊕

Radius (Jupiter)

0.245 R♃

Mass

8.00 M⊕

Mass (Jupiter)

0.025 M♃

Density

2.11 g/cm³

Surface Gravity

1.06 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.408

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

#804of 1978

top 40.6%

This planet

2.75R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

TOI-2545 b 2.75 R⊕ HIP 97166 c 2.75 R⊕ Kepler-304 d 2.75 R⊕

Metric	Earth	Kepler-193 c	Jupiter
Radius (R⊕)	1.00	2.75	11.21
Mass (M⊕)	1.00	8.00	317.83
Density (g/cm³)	5.51	2.11	1.33
Surface Gravity (g)	1.00	1.06	2.53
Insolation (S⊕)	1.00	16.03	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 2.750 R⊕ · percentile 59 / cohort 1978

Mass 8.000 M⊕ · percentile 54 / cohort 1978

Orbital period 50.70 d · percentile 85 / cohort 1946

Distance 1,009.10 pc · percentile 78 / cohort 1975

ESI 0.408 · percentile 54 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

50.697 days

Semi-major axis

0.2860 AU

Eccentricity

0.000

Inclination

89.88 °

Year Length

A year here lasts approximately 50.70 Earth days (13.9% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.2860 AU.

Transit Fingerprint

Depth

0.061 %

Duration

6.115 h

Impact parameter b

0.060

Rp / R★

0.022991

Transit midpoint (BJD)

2,454,974.3229

Photometric dip

Transit produces a flux drop of 611 ppm lasting ≈ 6.12 h.

Extended Orbital Architecture

Planet / star radius ratio

0.022991

Semi-major axis / stellar radius

65.710

Impact parameter (b)

0.060

Transit mid-time (BJD)

2,454,974.3229

Angular separation (arcsec)

0.28300

Eq. Temperature

595K

(322 °C)

Insolation (S⊕)

16.03

Earth = 1.00

Earth Similarity (ESI)

0.408

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