Key parameters at a glance

A radius of 8.20 Earth radii
A mass of 51.10 Earth masses
Surface gravity around 0.76 g
An orbital period of 4.584 days
Semi-major axis 0.0535 AU
Equilibrium temperature 1,038 K (765 °C)
Distance from Earth 3,773.07 light-years
Earth Similarity Index 0.142
Travel time at Voyager 1 speed 66,538,094 years

Kepler-703 b Planet Profile

Physical Specs

Radius

8.20 R⊕

Radius (Jupiter)

0.732 R♃

Mass

51.10 M⊕

Mass (Jupiter)

0.161 M♃

Density

0.51 g/cm³

Surface Gravity

0.76 g (Earth)

Classification

Planet Type

Neptune-like

ESI Score 0.142

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

#141of 574

top 24.4%

This planet

8.20R⊕

Neptune-like median

6.39R⊕

Nearest-size peers

TOI-4507 b 8.20 R⊕ TOI-4641 b 8.18 R⊕ K2-281 b 8.18 R⊕

Metric	Earth	Kepler-703 b	Jupiter
Radius (R⊕)	1.00	8.20	11.21
Mass (M⊕)	1.00	51.10	317.83
Density (g/cm³)	5.51	0.51	1.33
Surface Gravity (g)	1.00	0.76	2.53
Insolation (S⊕)	1.00	373.11	0.037

Star Catalogue Identifiers

TIC

TIC 171968443

Gaia DR2

Gaia DR2 2075358472669256448

Gaia DR3

Gaia DR3 2075358472669256448

System

Kepler-703

Percentile among Neptune-like cohort

Radius 8.200 R⊕ · percentile 75 / cohort 574

Mass 51.100 M⊕ · percentile 72 / cohort 574

Orbital period 4.58 d · percentile 18 / cohort 524

Distance 1,156.83 pc · percentile 78 / cohort 572

ESI 0.142 · percentile 11 / cohort 574

Orbit & Habitability

Orbital Dynamics

Period

4.584 days

Semi-major axis

0.0535 AU

Eccentricity

0.000

Inclination

89.81 °

Year Length

A year here lasts approximately 4.58 Earth days (1.3% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0535 AU.

Transit Fingerprint

Depth

0.425 %

Duration

2.715 h

Impact parameter b

0.038

Rp / R★

0.059408

Transit midpoint (BJD)

2,455,002.9738

Photometric dip

Transit produces a flux drop of 4,248 ppm lasting ≈ 2.72 h.

Extended Orbital Architecture

Planet / star radius ratio

0.059408

Semi-major axis / stellar radius

13.668

Impact parameter (b)

0.038

Transit mid-time (BJD)

2,455,002.9738

Angular separation (arcsec)

0.04620

Eq. Temperature

1,038K

(765 °C)

Insolation (S⊕)

373.11

Earth = 1.00

Earth Similarity (ESI)

0.142

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched.

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-703

Spectral Class

F-type yellow-white

Effective Temperature

6,185 K — hotter than the Sun (5,778 K)

Estimated Age

2.69 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.270 R☉

Stellar Mass

1.180 M☉

Metallicity [Fe/H]

0.05

Extended Stellar Properties

Surface gravity (log g)

4.290 dex

Stellar density

2.299 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,156.83 parsec

Light-years 3,773.07 ly

V-band magnitude

15.60 mag

Voyager-speed travel 66,538,094 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.837 mas

Total Proper Motion

2.276 mas/yr

PM Right Ascension

-2.19 mas/yr

PM Declination

0.61 mas/yr

Galactic Cartesian (pc)

x = 0.364 · y = -0.651 · z = 0.666

Equatorial (J2000)

RA 299.18686° · Dec 41.74270°

Galactic ℓ, b

76.795° · 6.713°

Ecliptic λ, β

317.547° · 60.454°

HTM-20 index

-365658897