Key parameters at a glance

A radius of 2.79 Earth radii
A mass of 8.20 Earth masses
Surface gravity around 1.05 g
An orbital period of 22.183 days
Semi-major axis 0.1453 AU
Equilibrium temperature 646 K (373 °C)
Distance from Earth 2,516.20 light-years
Earth Similarity Index 0.375
Travel time at Voyager 1 speed 44,373,166 years

Kepler-573 b Planet Profile

Physical Specs

Radius

2.79 R⊕

Radius (Jupiter)

0.249 R♃

Mass

8.20 M⊕

Mass (Jupiter)

0.026 M♃

Density

2.07 g/cm³

Surface Gravity

1.05 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.375

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

#754of 1978

top 38.1%

This planet

2.79R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

AU Mic c 2.79 R⊕ Kepler-150 d 2.79 R⊕ Kepler-192 c 2.79 R⊕

Metric	Earth	Kepler-573 b	Jupiter
Radius (R⊕)	1.00	2.79	11.21
Mass (M⊕)	1.00	8.20	317.83
Density (g/cm³)	5.51	2.07	1.33
Surface Gravity (g)	1.00	1.05	2.53
Insolation (S⊕)	1.00	46.44	0.037

Star Catalogue Identifiers

TIC

TIC 416266820

Gaia DR2

Gaia DR2 2133242846415831936

Gaia DR3

Gaia DR3 2133242846415831936

System

Kepler-573

Percentile among Sub-Neptune cohort

Radius 2.790 R⊕ · percentile 61 / cohort 1978

Mass 8.200 M⊕ · percentile 56 / cohort 1978

Orbital period 22.18 d · percentile 66 / cohort 1946

Distance 771.47 pc · percentile 63 / cohort 1975

ESI 0.375 · percentile 47 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

22.183 days

Semi-major axis

0.1453 AU

Eccentricity

0.000

Inclination

89.96 °

Year Length

A year here lasts approximately 22.18 Earth days (6.1% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1453 AU.

Transit Fingerprint

Depth

0.075 %

Duration

5.061 h

Impact parameter b

0.025

Rp / R★

0.025415

Transit midpoint (BJD)

2,455,002.4969

Photometric dip

Transit produces a flux drop of 748 ppm lasting ≈ 5.06 h.

Extended Orbital Architecture

Planet / star radius ratio

0.025415

Semi-major axis / stellar radius

34.333

Impact parameter (b)

0.025

Transit mid-time (BJD)

2,455,002.4969

Angular separation (arcsec)

0.18800

Eq. Temperature

646K

(373 °C)

Insolation (S⊕)

46.44

Earth = 1.00

Earth Similarity (ESI)

0.375

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-573

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,746 K — cooler than the Sun (5,778 K)

Estimated Age

5.89 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

1.020 R☉

Stellar Mass

0.990 M☉

Metallicity [Fe/H]

0.02

Extended Stellar Properties

Surface gravity (log g)

4.410 dex

Stellar density

0.750 g/cm³

Metallicity ratio

[Fe/H]

Distance

771.47 parsec

Light-years 2,516.20 ly

V-band magnitude

14.29 mag

Voyager-speed travel 44,373,166 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.267 mas

Total Proper Motion

20.440 mas/yr

PM Right Ascension

4.87 mas/yr

PM Declination

19.85 mas/yr

Galactic Cartesian (pc)

x = 0.209 · y = -0.590 · z = 0.780

Equatorial (J2000)

RA 289.52120° · Dec 51.23741°

Galactic ℓ, b

82.392° · 16.912°

Ecliptic λ, β

312.132° · 71.830°

HTM-20 index

48166459