Key parameters at a glance

A radius of 3.05 Earth radii
A mass of 9.53 Earth masses
Surface gravity around 1.02 g
An orbital period of 14.554 days
Semi-major axis 0.1256 AU
Equilibrium temperature 939 K (666 °C)
Distance from Earth 4,130.24 light-years
Earth Similarity Index 0.248
Travel time at Voyager 1 speed 72,836,847 years

Kepler-791 b Planet Profile

Physical Specs

Radius

3.05 R⊕

Radius (Jupiter)

0.272 R♃

Mass

9.53 M⊕

Mass (Jupiter)

0.030 M♃

Density

1.85 g/cm³

Surface Gravity

1.02 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.248

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

#472of 1978

top 23.8%

This planet

3.05R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-1518 b 3.05 R⊕ Kepler-1204 b 3.05 R⊕ HD 168009 b 3.05 R⊕

Metric	Earth	Kepler-791 b	Jupiter
Radius (R⊕)	1.00	3.05	11.21
Mass (M⊕)	1.00	9.53	317.83
Density (g/cm³)	5.51	1.85	1.33
Surface Gravity (g)	1.00	1.02	2.53
Insolation (S⊕)	1.00	140.06	0.037

Star Catalogue Identifiers

TIC

TIC 138303317

Gaia DR2

Gaia DR2 2052397886736075264

Gaia DR3

Gaia DR3 2052397886736075264

System

Kepler-791

Percentile among Sub-Neptune cohort

Radius 3.050 R⊕ · percentile 76 / cohort 1978

Mass 9.530 M⊕ · percentile 69 / cohort 1978

Orbital period 14.55 d · percentile 50 / cohort 1946

Distance 1,266.34 pc · percentile 88 / cohort 1975

ESI 0.248 · percentile 16 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

14.554 days

Semi-major axis

0.1256 AU

Eccentricity

0.000

Inclination

80.57 °

Year Length

A year here lasts approximately 14.55 Earth days (4.0% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1256 AU.

Transit Fingerprint

Depth

0.032 %

Duration

6.254 h

Impact parameter b

0.863

Rp / R★

0.019311

Transit midpoint (BJD)

2,454,967.1131

Photometric dip

Transit produces a flux drop of 320 ppm lasting ≈ 6.25 h.

Extended Orbital Architecture

Planet / star radius ratio

0.019311

Semi-major axis / stellar radius

10.100

Impact parameter (b)

0.863

Transit mid-time (BJD)

2,454,967.1131

Angular separation (arcsec)

0.09920

Eq. Temperature

939K

(666 °C)

Insolation (S⊕)

140.06

Earth = 1.00

Earth Similarity (ESI)

0.248

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-791

Spectral Class

F-type yellow-white

Effective Temperature

6,383 K — hotter than the Sun (5,778 K)

Estimated Age

2.24 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.470 R☉

Stellar Mass

1.300 M☉

Metallicity [Fe/H]

0.06

Extended Stellar Properties

Surface gravity (log g)

4.210 dex

Stellar density

0.018 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,266.34 parsec

Light-years 4,130.24 ly

V-band magnitude

14.47 mag

Voyager-speed travel 72,836,847 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.762 mas

Total Proper Motion

13.839 mas/yr

PM Right Ascension

-5.29 mas/yr

PM Declination

-12.79 mas/yr

Galactic Cartesian (pc)

x = 0.311 · y = -0.712 · z = 0.630

Equatorial (J2000)

RA 293.59580° · Dec 39.02943°

Galactic ℓ, b

72.310° · 9.111°

Ecliptic λ, β

307.674° · 59.420°

HTM-20 index

1335474878