Key parameters at a glance

A radius of 2.57 Earth radii
A mass of 7.13 Earth masses
Surface gravity around 1.08 g
An orbital period of 37.814 days
Semi-major axis 0.2316 AU
Equilibrium temperature 626 K (353 °C)
Distance from Earth 3,080.74 light-years
Earth Similarity Index 0.399
Travel time at Voyager 1 speed 54,328,889 years

Kepler-839 b Planet Profile

Physical Specs

Radius

2.57 R⊕

Radius (Jupiter)

0.229 R♃

Mass

7.13 M⊕

Mass (Jupiter)

0.022 M♃

Density

2.31 g/cm³

Surface Gravity

1.08 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.399

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

#1074of 1978

top 54.2%

This planet

2.57R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-1549 b 2.57 R⊕ Kepler-245 b 2.57 R⊕ Kepler-313 c 2.57 R⊕

Metric	Earth	Kepler-839 b	Jupiter
Radius (R⊕)	1.00	2.57	11.21
Mass (M⊕)	1.00	7.13	317.83
Density (g/cm³)	5.51	2.31	1.33
Surface Gravity (g)	1.00	1.08	2.53
Insolation (S⊕)	1.00	46.30	0.037

Star Catalogue Identifiers

TIC

TIC 159580625

Gaia DR2

Gaia DR2 2127396880530950272

Gaia DR3

Gaia DR3 2127396880530950272

System

Kepler-839

Percentile among Sub-Neptune cohort

Radius 2.570 R⊕ · percentile 45 / cohort 1978

Mass 7.130 M⊕ · percentile 42 / cohort 1978

Orbital period 37.81 d · percentile 79 / cohort 1946

Distance 944.56 pc · percentile 75 / cohort 1975

ESI 0.399 · percentile 52 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

37.814 days

Semi-major axis

0.2316 AU

Eccentricity

0.000

Inclination

87.34 °

Year Length

A year here lasts approximately 37.81 Earth days (10.4% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.2316 AU.

Transit Fingerprint

Depth

0.041 %

Duration

8.579 h

Impact parameter b

0.905

Rp / R★

0.018398

Transit midpoint (BJD)

2,454,967.6670

Photometric dip

Transit produces a flux drop of 413 ppm lasting ≈ 8.58 h.

Extended Orbital Architecture

Planet / star radius ratio

0.018398

Semi-major axis / stellar radius

34.290

Impact parameter (b)

0.905

Transit mid-time (BJD)

2,454,967.6670

Angular separation (arcsec)

0.24500

Eq. Temperature

626K

(353 °C)

Insolation (S⊕)

46.30

Earth = 1.00

Earth Similarity (ESI)

0.399

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-839

Spectral Class

F-type yellow-white

Effective Temperature

6,058 K — hotter than the Sun (5,778 K)

Estimated Age

2.82 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.310 R☉

Stellar Mass

1.220 M☉

Metallicity [Fe/H]

0.29

Extended Stellar Properties

Surface gravity (log g)

4.290 dex

Stellar density

0.360 g/cm³

Metallicity ratio

[Fe/H]

Distance

944.56 parsec

Light-years 3,080.74 ly

V-band magnitude

13.69 mag

Voyager-speed travel 54,328,889 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.030 mas

Total Proper Motion

10.140 mas/yr

PM Right Ascension

1.18 mas/yr

PM Declination

-10.07 mas/yr

Galactic Cartesian (pc)

x = 0.253 · y = -0.657 · z = 0.710

Equatorial (J2000)

RA 291.07468° · Dec 45.24254°

Galactic ℓ, b

77.139° · 13.547°

Ecliptic λ, β

308.318° · 65.901°

HTM-20 index

1594501570