Key parameters at a glance

A radius of 0.95 Earth radii
A mass of 0.81 Earth masses
Surface gravity around 0.90 g
An orbital period of 4.342 days
Semi-major axis 0.0521 AU
Equilibrium temperature 1,236 K (963 °C)
Distance from Earth 2,021.72 light-years
Earth Similarity Index 0.252
Travel time at Voyager 1 speed 35,652,979 years

Kepler-1598 b Planet Profile

Physical Specs

Radius

0.95 R⊕

Radius (Jupiter)

0.085 R♃

Mass

0.81 M⊕

Mass (Jupiter)

0.003 M♃

Density

5.18 g/cm³

Surface Gravity

0.90 g (Earth)

Classification

Planet Type

Rocky Terrestrial

ESI Score 0.252

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

#376of 570

top 65.8%

This planet

0.95R⊕

Rocky Terrestrial median

1.01R⊕

Nearest-size peers

Kepler-1049 b 0.95 R⊕ Kepler-106 d 0.95 R⊕ Kepler-271 c 0.95 R⊕

Metric	Earth	Kepler-1598 b	Jupiter
Radius (R⊕)	1.00	0.95	11.21
Mass (M⊕)	1.00	0.81	317.83
Density (g/cm³)	5.51	5.18	1.33
Surface Gravity (g)	1.00	0.90	2.53
Insolation (S⊕)	1.00	308.46	0.037

Star Catalogue Identifiers

TIC

TIC 158730471

Gaia DR2

Gaia DR2 2130770766319922560

Gaia DR3

Gaia DR3 2130770766319922560

System

Kepler-1598

Percentile among Rocky Terrestrial cohort

Radius 0.950 R⊕ · percentile 33 / cohort 570

Mass 0.809 M⊕ · percentile 29 / cohort 570

Orbital period 4.34 d · percentile 48 / cohort 567

Distance 619.86 pc · percentile 75 / cohort 566

ESI 0.252 · percentile 25 / cohort 570

Orbit & Habitability

Orbital Dynamics

Period

4.342 days

Semi-major axis

0.0521 AU

Eccentricity

0.000

Inclination

89.47 °

Year Length

A year here lasts approximately 4.34 Earth days (1.2% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0521 AU.

Transit Fingerprint

Depth

0.008 %

Duration

2.696 h

Impact parameter b

0.002

Rp / R★

0.008065

Transit midpoint (BJD)

2,454,967.1850

Photometric dip

Transit produces a flux drop of 77 ppm lasting ≈ 2.70 h.

Extended Orbital Architecture

Planet / star radius ratio

0.008065

Semi-major axis / stellar radius

12.790

Impact parameter (b)

0.002

Transit mid-time (BJD)

2,454,967.1850

Angular separation (arcsec)

0.08400

Eq. Temperature

1,236K

(963 °C)

Insolation (S⊕)

308.46

Earth = 1.00

Earth Similarity (ESI)

0.252

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched.

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-1598

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,940 K — hotter than the Sun (5,778 K)

Estimated Age

3.80 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.090 R☉

Stellar Mass

1.070 M☉

Metallicity [Fe/H]

0.04

Extended Stellar Properties

Surface gravity (log g)

4.390 dex

Stellar density

1.270 g/cm³

Metallicity ratio

[Fe/H]

Distance

619.86 parsec

Light-years 2,021.72 ly

V-band magnitude

13.93 mag

Voyager-speed travel 35,652,979 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.585 mas

Total Proper Motion

9.079 mas/yr

PM Right Ascension

1.54 mas/yr

PM Declination

-8.95 mas/yr

Galactic Cartesian (pc)

x = 0.217 · y = -0.649 · z = 0.729

Equatorial (J2000)

RA 288.46911° · Dec 46.78365°

Galactic ℓ, b

77.833° · 15.827°

Ecliptic λ, β

305.329° · 67.970°

HTM-20 index

1860711382