Key parameters at a glance

A radius of 3.79 Earth radii
A mass of 13.80 Earth masses
Surface gravity around 0.96 g
An orbital period of 50.286 days
Semi-major axis 0.2672 AU
Equilibrium temperature 543 K (270 °C)
Distance from Earth 2,086.65 light-years
Earth Similarity Index 0.389
Travel time at Voyager 1 speed 36,798,097 years

Kepler-803 b Planet Profile

Physical Specs

Radius

3.79 R⊕

Radius (Jupiter)

0.338 R♃

Mass

13.80 M⊕

Mass (Jupiter)

0.043 M♃

Density

1.39 g/cm³

Surface Gravity

0.96 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.389

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

#61of 1978

top 3.0%

This planet

3.79R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-1793 b 3.79 R⊕ Kepler-920 c 3.80 R⊕ K2-10 b 3.77 R⊕

Metric	Earth	Kepler-803 b	Jupiter
Radius (R⊕)	1.00	3.79	11.21
Mass (M⊕)	1.00	13.80	317.83
Density (g/cm³)	5.51	1.39	1.33
Surface Gravity (g)	1.00	0.96	2.53
Insolation (S⊕)	1.00	20.88	0.037

Star Catalogue Identifiers

TIC

TIC 268608781

Gaia DR2

Gaia DR2 2079139864948330752

Gaia DR3

Gaia DR3 2079139864948330752

System

Kepler-803

Percentile among Sub-Neptune cohort

Radius 3.790 R⊕ · percentile 97 / cohort 1978

Mass 13.800 M⊕ · percentile 90 / cohort 1978

Orbital period 50.29 d · percentile 85 / cohort 1946

Distance 639.77 pc · percentile 56 / cohort 1975

ESI 0.389 · percentile 50 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

50.286 days

Semi-major axis

0.2672 AU

Eccentricity

0.000

Inclination

89.98 °

Year Length

A year here lasts approximately 50.29 Earth days (13.8% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.2672 AU.

Transit Fingerprint

Depth

0.112 %

Duration

6.367 h

Impact parameter b

0.123

Rp / R★

0.031049

Transit midpoint (BJD)

2,455,000.6324

Photometric dip

Transit produces a flux drop of 1,119 ppm lasting ≈ 6.37 h.

Extended Orbital Architecture

Planet / star radius ratio

0.031049

Semi-major axis / stellar radius

61.770

Impact parameter (b)

0.123

Transit mid-time (BJD)

2,455,000.6324

Angular separation (arcsec)

0.41800

Eq. Temperature

543K

(270 °C)

Insolation (S⊕)

20.88

Earth = 1.00

Earth Similarity (ESI)

0.389

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

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-803

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,919 K — hotter than the Sun (5,778 K)

Estimated Age

4.90 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

1.120 R☉

Stellar Mass

1.050 M☉

Metallicity [Fe/H]

0.02

Extended Stellar Properties

Surface gravity (log g)

4.360 dex

Stellar density

0.680 g/cm³

Metallicity ratio

[Fe/H]

Distance

639.77 parsec

Light-years 2,086.65 ly

V-band magnitude

13.86 mag

Voyager-speed travel 36,798,097 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.534 mas

Total Proper Motion

11.503 mas/yr

PM Right Ascension

10.93 mas/yr

PM Declination

3.59 mas/yr

Galactic Cartesian (pc)

x = 0.347 · y = -0.620 · z = 0.703

Equatorial (J2000)

RA 299.22167° · Dec 44.69390°

Galactic ℓ, b

79.372° · 8.191°

Ecliptic λ, β

320.167° · 63.134°

HTM-20 index

-2076771812