Key parameters at a glance

A radius of 3.32 Earth radii
A mass of 11.00 Earth masses
Surface gravity around 1.00 g
An orbital period of 12.532 days
Semi-major axis 0.1054 AU
Equilibrium temperature 775 K (502 °C)
Distance from Earth 4,470.46 light-years
Earth Similarity Index 0.292
Travel time at Voyager 1 speed 78,836,509 years

Kepler-739 b Planet Profile

Physical Specs

Radius

3.32 R⊕

Radius (Jupiter)

0.296 R♃

Mass

11.00 M⊕

Mass (Jupiter)

0.035 M♃

Density

1.65 g/cm³

Surface Gravity

1.00 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.292

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

#268of 1978

top 13.5%

This planet

3.32R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-620 b 3.32 R⊕ Kepler-1270 b 3.32 R⊕ Kepler-411 d 3.32 R⊕

Metric	Earth	Kepler-739 b	Jupiter
Radius (R⊕)	1.00	3.32	11.21
Mass (M⊕)	1.00	11.00	317.83
Density (g/cm³)	5.51	1.65	1.33
Surface Gravity (g)	1.00	1.00	2.53
Insolation (S⊕)	1.00	115.96	0.037

Star Catalogue Identifiers

TIC

TIC 159225155

Gaia DR2

Gaia DR2 2127717182012104960

Gaia DR3

Gaia DR3 2127717182012104960

System

Kepler-739

Percentile among Sub-Neptune cohort

Radius 3.320 R⊕ · percentile 86 / cohort 1978

Mass 11.000 M⊕ · percentile 80 / cohort 1978

Orbital period 12.53 d · percentile 43 / cohort 1946

Distance 1,370.65 pc · percentile 91 / cohort 1975

ESI 0.292 · percentile 26 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

12.532 days

Semi-major axis

0.1054 AU

Eccentricity

0.000

Inclination

87.96 °

Year Length

A year here lasts approximately 12.53 Earth days (3.4% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1054 AU.

Transit Fingerprint

Depth

0.115 %

Duration

4.010 h

Impact parameter b

0.025

Rp / R★

0.034158

Transit midpoint (BJD)

2,455,003.7650

Photometric dip

Transit produces a flux drop of 1,146 ppm lasting ≈ 4.01 h.

Extended Orbital Architecture

Planet / star radius ratio

0.034158

Semi-major axis / stellar radius

25.200

Impact parameter (b)

0.025

Transit mid-time (BJD)

2,455,003.7650

Angular separation (arcsec)

0.07690

Eq. Temperature

775K

(502 °C)

Insolation (S⊕)

115.96

Earth = 1.00

Earth Similarity (ESI)

0.292

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-739

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,601 K — cooler than the Sun (5,778 K)

Estimated Age

4.27 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.900 R☉

Stellar Mass

0.930 M☉

Metallicity [Fe/H]

-0.08

Extended Stellar Properties

Surface gravity (log g)

4.510 dex

Stellar density

0.910 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,370.65 parsec

Light-years 4,470.46 ly

V-band magnitude

15.71 mag

Voyager-speed travel 78,836,509 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.701 mas

Total Proper Motion

3.492 mas/yr

PM Right Ascension

3.33 mas/yr

PM Declination

1.05 mas/yr

Galactic Cartesian (pc)

x = 0.236 · y = -0.646 · z = 0.726

Equatorial (J2000)

RA 290.06799° · Dec 46.57915°

Galactic ℓ, b

78.092° · 14.740°

Ecliptic λ, β

307.854° · 67.399°

HTM-20 index

1760844482