Key parameters at a glance

A radius of 2.12 Earth radii
A mass of 5.14 Earth masses
Surface gravity around 1.14 g
An orbital period of 21.416 days
Semi-major axis 0.1548 AU
Equilibrium temperature 748 K (475 °C)
Distance from Earth 3,141.47 light-years
Earth Similarity Index 0.360
Travel time at Voyager 1 speed 55,399,809 years

Kepler-544 b Planet Profile

Physical Specs

Radius

2.12 R⊕

Radius (Jupiter)

0.189 R♃

Mass

5.14 M⊕

Mass (Jupiter)

0.016 M♃

Density

2.96 g/cm³

Surface Gravity

1.14 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.360

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

#1782of 1978

top 90.0%

This planet

2.12R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-161 b 2.12 R⊕ Kepler-158 b 2.12 R⊕ HD 97658 b 2.12 R⊕

Metric	Earth	Kepler-544 b	Jupiter
Radius (R⊕)	1.00	2.12	11.21
Mass (M⊕)	1.00	5.14	317.83
Density (g/cm³)	5.51	2.96	1.33
Surface Gravity (g)	1.00	1.14	2.53
Insolation (S⊕)	1.00	126.03	0.037

Star Catalogue Identifiers

TIC

TIC 138571095

Gaia DR2

Gaia DR2 2052388643966743424

Gaia DR3

Gaia DR3 2052388643966743424

System

Kepler-544

Percentile among Sub-Neptune cohort

Radius 2.120 R⊕ · percentile 9 / cohort 1978

Mass 5.140 M⊕ · percentile 10 / cohort 1978

Orbital period 21.42 d · percentile 65 / cohort 1946

Distance 963.18 pc · percentile 76 / cohort 1975

ESI 0.360 · percentile 43 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

21.416 days

Semi-major axis

0.1548 AU

Eccentricity

0.000

Inclination

89.80 °

Year Length

A year here lasts approximately 21.42 Earth days (5.9% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1548 AU.

Transit Fingerprint

Depth

0.031 %

Duration

7.089 h

Impact parameter b

0.778

Rp / R★

0.016246

Transit midpoint (BJD)

2,455,009.2512

Photometric dip

Transit produces a flux drop of 315 ppm lasting ≈ 7.09 h.

Extended Orbital Architecture

Planet / star radius ratio

0.016246

Semi-major axis / stellar radius

23.413

Impact parameter (b)

0.778

Transit mid-time (BJD)

2,455,009.2512

Angular separation (arcsec)

0.16100

Eq. Temperature

748K

(475 °C)

Insolation (S⊕)

126.03

Earth = 1.00

Earth Similarity (ESI)

0.360

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-544

Spectral Class

F-type yellow-white

Effective Temperature

6,206 K — hotter than the Sun (5,778 K)

Estimated Age

2.63 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.220 R☉

Stellar Mass

1.160 M☉

Metallicity [Fe/H]

0.02

Extended Stellar Properties

Surface gravity (log g)

4.330 dex

Stellar density

0.360 g/cm³

Metallicity ratio

[Fe/H]

Distance

963.18 parsec

Light-years 3,141.47 ly

V-band magnitude

13.67 mag

Voyager-speed travel 55,399,809 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.010 mas

Total Proper Motion

11.787 mas/yr

PM Right Ascension

-4.91 mas/yr

PM Declination

-10.72 mas/yr

Galactic Cartesian (pc)

x = 0.316 · y = -0.709 · z = 0.630

Equatorial (J2000)

RA 294.02907° · Dec 39.05179°

Galactic ℓ, b

72.489° · 8.824°

Ecliptic λ, β

308.315° · 59.336°

HTM-20 index

1313933446