Key parameters at a glance

A radius of 0.84 Earth radii
A mass of 0.52 Earth masses
Surface gravity around 0.74 g
An orbital period of 0.850 days
Semi-major axis 0.0140 AU
Equilibrium temperature 1,139 K (866 °C)
Distance from Earth 1,519.89 light-years
Earth Similarity Index 0.267
Travel time at Voyager 1 speed 26,803,205 years
Almost certainly tidally locked to its host star given the close orbit

Kepler-1579 b Planet Profile

Physical Specs

Radius

0.84 R⊕

Radius (Jupiter)

0.075 R♃

Mass

0.52 M⊕

Mass (Jupiter)

0.002 M♃

Density

4.82 g/cm³

Surface Gravity

0.74 g (Earth)

Classification

Planet Type

Rocky Terrestrial

ESI Score 0.267

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

#456of 570

top 79.8%

This planet

0.84R⊕

Rocky Terrestrial median

1.01R⊕

Nearest-size peers

Kepler-1507 b 0.84 R⊕ Kepler-131 c 0.84 R⊕ Kepler-450 d 0.84 R⊕

Metric	Earth	Kepler-1579 b	Jupiter
Radius (R⊕)	1.00	0.84	11.21
Mass (M⊕)	1.00	0.52	317.83
Density (g/cm³)	5.51	4.82	1.33
Surface Gravity (g)	1.00	0.74	2.53
Insolation (S⊕)	1.00	396.64	0.037

Star Catalogue Identifiers

TIC

TIC 275571034

Gaia DR2

Gaia DR2 2078225792827512704

Gaia DR3

Gaia DR3 2078225792827512704

System

Kepler-1579

Percentile among Rocky Terrestrial cohort

Radius 0.840 R⊕ · percentile 20 / cohort 570

Mass 0.520 M⊕ · percentile 16 / cohort 570

Orbital period 0.85 d · percentile 9 / cohort 567

Distance 466.00 pc · percentile 60 / cohort 566

ESI 0.267 · percentile 29 / cohort 570

Orbit & Habitability

Orbital Dynamics

Period

0.850 days

Semi-major axis

0.0140 AU

Eccentricity

0.000

Inclination

81.86 °

Year Length

A year here lasts roughly 20.4 hours long on a nearly circular orbit at a mean orbital distance of 0.0140 AU.

Transit Fingerprint

Depth

0.013 %

Duration

1.093 h

Impact parameter b

0.259

Rp / R★

0.010679

Transit midpoint (BJD)

2,454,964.6718

Photometric dip

Transit produces a flux drop of 131 ppm lasting ≈ 1.09 h.

Extended Orbital Architecture

Planet / star radius ratio

0.010679

Semi-major axis / stellar radius

4.520

Impact parameter (b)

0.259

Transit mid-time (BJD)

2,454,964.6718

Angular separation (arcsec)

0.03000

Eq. Temperature

1,139K

(866 °C)

Insolation (S⊕)

396.64

Earth = 1.00

Earth Similarity (ESI)

0.267

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched. Close-orbiting tidally-locked around a cool host.

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-1579

Spectral Class

K-type orange

Effective Temperature

4,584 K — cooler than the Sun (5,778 K)

Estimated Age

2.24 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.700 R☉

Stellar Mass

0.750 M☉

Metallicity [Fe/H]

0.11

Extended Stellar Properties

Surface gravity (log g)

4.630 dex

Stellar density

2.421 g/cm³

Metallicity ratio

[Fe/H]

Distance

466.00 parsec

Light-years 1,519.89 ly

V-band magnitude

15.49 mag

Voyager-speed travel 26,803,205 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

2.698 mas

Total Proper Motion

7.654 mas/yr

PM Right Ascension

7.65 mas/yr

PM Declination

0.16 mas/yr

Galactic Cartesian (pc)

x = 0.287 · y = -0.666 · z = 0.689

Equatorial (J2000)

RA 293.28802° · Dec 43.51491°

Galactic ℓ, b

76.255° · 11.370°

Ecliptic λ, β

310.364° · 63.726°

HTM-20 index

-614045590