Key parameters at a glance

A radius of 1.27 Earth radii
A mass of 2.15 Earth masses
Surface gravity around 1.33 g
An orbital period of 8.185 days
Semi-major axis 0.0794 AU
Equilibrium temperature 892 K (619 °C)
Distance from Earth 4,630.05 light-years
Earth Similarity Index 0.350
Travel time at Voyager 1 speed 81,650,845 years

Kepler-1591 b Planet Profile

Physical Specs

Radius

1.27 R⊕

Radius (Jupiter)

0.113 R♃

Mass

2.15 M⊕

Mass (Jupiter)

0.007 M♃

Density

5.77 g/cm³

Surface Gravity

1.33 g (Earth)

Classification

Planet Type

Super-Earth

ESI Score 0.350

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

#1135of 1176

top 96.4%

This planet

1.27R⊕

Super-Earth median

1.60R⊕

Nearest-size peers

Kepler-85 e 1.27 R⊕ Kepler-404 b 1.27 R⊕ Kepler-181 b 1.27 R⊕

Metric	Earth	Kepler-1591 b	Jupiter
Radius (R⊕)	1.00	1.27	11.21
Mass (M⊕)	1.00	2.15	317.83
Density (g/cm³)	5.51	5.77	1.33
Surface Gravity (g)	1.00	1.33	2.53
Insolation (S⊕)	1.00	439.43	0.037

Star Catalogue Identifiers

TIC

TIC 272491028

Gaia DR2

Gaia DR2 2079691991583086592

Gaia DR3

Gaia DR3 2079691991583086592

System

Kepler-1591

Percentile among Super-Earth cohort

Radius 1.270 R⊕ · percentile 3 / cohort 1176

Mass 2.150 M⊕ · percentile 4 / cohort 1176

Orbital period 8.19 d · percentile 58 / cohort 1164

Distance 1,419.58 pc · percentile 94 / cohort 1171

ESI 0.350 · percentile 50 / cohort 1176

Orbit & Habitability

Orbital Dynamics

Period

8.185 days

Semi-major axis

0.0794 AU

Eccentricity

0.000

Inclination

86.83 °

Year Length

A year here lasts approximately 8.19 Earth days (2.2% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0794 AU.

Transit Fingerprint

Depth

0.010 %

Duration

4.214 h

Impact parameter b

0.137

Rp / R★

0.009556

Transit midpoint (BJD)

2,454,967.5538

Photometric dip

Transit produces a flux drop of 98 ppm lasting ≈ 4.21 h.

Extended Orbital Architecture

Planet / star radius ratio

0.009556

Semi-major axis / stellar radius

14.850

Impact parameter (b)

0.137

Transit mid-time (BJD)

2,454,967.5538

Angular separation (arcsec)

0.05590

Eq. Temperature

892K

(619 °C)

Insolation (S⊕)

439.43

Earth = 1.00

Earth Similarity (ESI)

0.350

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-1591

Spectral Class

F-type yellow-white

Effective Temperature

6,082 K — hotter than the Sun (5,778 K)

Estimated Age

3.24 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.160 R☉

Stellar Mass

1.100 M☉

Metallicity [Fe/H]

0.01

Extended Stellar Properties

Surface gravity (log g)

4.350 dex

Stellar density

0.925 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,419.58 parsec

Light-years 4,630.05 ly

V-band magnitude

14.85 mag

Voyager-speed travel 81,650,845 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.676 mas

Total Proper Motion

1.712 mas/yr

PM Right Ascension

0.16 mas/yr

PM Declination

1.70 mas/yr

Galactic Cartesian (pc)

x = 0.318 · y = -0.637 · z = 0.702

Equatorial (J2000)

RA 296.51667° · Dec 44.60862°

Galactic ℓ, b

78.337° · 9.824°

Ecliptic λ, β

316.166° · 63.858°

HTM-20 index

-1949598176