Key parameters at a glance

A radius of 1.42 Earth radii
A mass of 2.60 Earth masses
Surface gravity around 1.29 g
An orbital period of 7.561 days
Semi-major axis 0.0751 AU
Equilibrium temperature 891 K (618 °C)
Distance from Earth 2,928.17 light-years
Earth Similarity Index 0.344
Travel time at Voyager 1 speed 51,638,330 years

Kepler-1303 b Planet Profile

Physical Specs

Radius

1.42 R⊕

Radius (Jupiter)

0.127 R♃

Mass

2.60 M⊕

Mass (Jupiter)

0.008 M♃

Density

4.99 g/cm³

Surface Gravity

1.29 g (Earth)

Classification

Planet Type

Super-Earth

ESI Score 0.344

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

#884of 1176

top 75.1%

This planet

1.42R⊕

Super-Earth median

1.60R⊕

Nearest-size peers

Kepler-763 c 1.42 R⊕ Kepler-1290 b 1.42 R⊕ TOI-286 b 1.42 R⊕

Metric	Earth	Kepler-1303 b	Jupiter
Radius (R⊕)	1.00	1.42	11.21
Mass (M⊕)	1.00	2.60	317.83
Density (g/cm³)	5.51	4.99	1.33
Surface Gravity (g)	1.00	1.29	2.53
Insolation (S⊕)	1.00	182.38	0.037

Star Catalogue Identifiers

TIC

TIC 164674711

Gaia DR2

Gaia DR2 2104156984291199360

Gaia DR3

Gaia DR3 2104156984291199360

System

Kepler-1303

Percentile among Super-Earth cohort

Radius 1.420 R⊕ · percentile 24 / cohort 1176

Mass 2.600 M⊕ · percentile 23 / cohort 1176

Orbital period 7.56 d · percentile 55 / cohort 1164

Distance 897.78 pc · percentile 75 / cohort 1171

ESI 0.344 · percentile 49 / cohort 1176

Orbit & Habitability

Orbital Dynamics

Period

7.561 days

Semi-major axis

0.0751 AU

Eccentricity

0.000

Inclination

89.27 °

Year Length

A year here lasts approximately 7.56 Earth days (2.1% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0751 AU.

Transit Fingerprint

Depth

0.018 %

Duration

2.938 h

Impact parameter b

0.030

Rp / R★

0.012788

Transit midpoint (BJD)

2,454,968.6360

Photometric dip

Transit produces a flux drop of 181 ppm lasting ≈ 2.94 h.

Extended Orbital Architecture

Planet / star radius ratio

0.012788

Semi-major axis / stellar radius

20.000

Impact parameter (b)

0.030

Transit mid-time (BJD)

2,454,968.6360

Angular separation (arcsec)

0.08370

Eq. Temperature

891K

(618 °C)

Insolation (S⊕)

182.38

Earth = 1.00

Earth Similarity (ESI)

0.344

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-1303

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,771 K — cooler than the Sun (5,778 K)

Estimated Age

4.47 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.000 R☉

Stellar Mass

1.010 M☉

Metallicity [Fe/H]

0.04

Extended Stellar Properties

Surface gravity (log g)

4.440 dex

Stellar density

2.566 g/cm³

Metallicity ratio

[Fe/H]

Distance

897.78 parsec

Light-years 2,928.17 ly

V-band magnitude

14.85 mag

Voyager-speed travel 51,638,330 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.085 mas

Total Proper Motion

6.600 mas/yr

PM Right Ascension

-0.73 mas/yr

PM Declination

-6.56 mas/yr

Galactic Cartesian (pc)

x = 0.182 · y = -0.716 · z = 0.674

Equatorial (J2000)

RA 284.28715° · Dec 42.35558°

Galactic ℓ, b

72.387° · 16.907°

Ecliptic λ, β

295.112° · 64.554°

HTM-20 index

1528278514