Key parameters at a glance

A radius of 0.71 Earth radii
A mass of 0.29 Earth masses
Surface gravity around 0.57 g
An orbital period of 1.342 days
Semi-major axis 0.0236 AU
Equilibrium temperature 1,642 K (1369 °C)
Distance from Earth 1,210.20 light-years
Earth Similarity Index 0.167
Travel time at Voyager 1 speed 21,341,851 years

Kepler-1339 b Planet Profile

Physical Specs

Radius

0.71 R⊕

Radius (Jupiter)

0.063 R♃

Mass

0.29 M⊕

Mass (Jupiter)

0.001 M♃

Density

4.38 g/cm³

Surface Gravity

0.57 g (Earth)

Classification

Planet Type

Rocky Terrestrial

ESI Score 0.167

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

#524of 570

top 91.8%

This planet

0.71R⊕

Rocky Terrestrial median

1.01R⊕

Nearest-size peers

K2-266 c 0.71 R⊕ Kepler-378 c 0.70 R⊕ Kepler-1349 b 0.70 R⊕

Metric	Earth	Kepler-1339 b	Jupiter
Radius (R⊕)	1.00	0.71	11.21
Mass (M⊕)	1.00	0.29	317.83
Density (g/cm³)	5.51	4.38	1.33
Surface Gravity (g)	1.00	0.57	2.53
Insolation (S⊕)	1.00	3,094.82	0.037

Star Catalogue Identifiers

TIC

TIC 48354224

Gaia DR2

Gaia DR2 2131677584235170048

Gaia DR3

Gaia DR3 2131677584235170048

System

Kepler-1339

Percentile among Rocky Terrestrial cohort

Radius 0.710 R⊕ · percentile 8 / cohort 570

Mass 0.285 M⊕ · percentile 6 / cohort 570

Orbital period 1.34 d · percentile 14 / cohort 567

Distance 371.05 pc · percentile 49 / cohort 566

ESI 0.167 · percentile 8 / cohort 570

Orbit & Habitability

Orbital Dynamics

Period

1.342 days

Semi-major axis

0.0236 AU

Eccentricity

0.000

Inclination

87.56 °

Year Length

A year here lasts approximately 1.34 Earth days (0.4% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0236 AU.

Transit Fingerprint

Depth

0.006 %

Duration

1.701 h

Impact parameter b

0.059

Rp / R★

0.007001

Transit midpoint (BJD)

2,454,965.7388

Photometric dip

Transit produces a flux drop of 58 ppm lasting ≈ 1.70 h.

Extended Orbital Architecture

Planet / star radius ratio

0.007001

Semi-major axis / stellar radius

6.085

Impact parameter (b)

0.059

Transit mid-time (BJD)

2,454,965.7388

Angular separation (arcsec)

0.06350

Eq. Temperature

1,642K

(1369 °C)

Insolation (S⊕)

3,094.82

Earth = 1.00

Earth Similarity (ESI)

0.167

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-1339

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,586 K — cooler than the Sun (5,778 K)

Estimated Age

5.62 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

0.930 R☉

Stellar Mass

0.940 M☉

Metallicity [Fe/H]

0.01

Extended Stellar Properties

Surface gravity (log g)

4.470 dex

Stellar density

0.500 g/cm³

Systemic radial velocity

-48.79 km/s

Metallicity ratio

[Fe/H]

Distance

371.05 parsec

Light-years 1,210.20 ly

V-band magnitude

12.34 mag

Voyager-speed travel 21,341,851 yr

Multi-band Host Photometry — 14 bands

Astrometric Data

Parallax

2.668 mas

Total Proper Motion

18.078 mas/yr

PM Right Ascension

-14.54 mas/yr

PM Declination

10.75 mas/yr

Galactic Cartesian (pc)

x = 0.158 · y = -0.645 · z = 0.747

Equatorial (J2000)

RA 283.74577° · Dec 48.37347°

Galactic ℓ, b

78.179° · 19.372°

Ecliptic λ, β

298.172° · 70.471°

HTM-20 index

1410791117