Key parameters at a glance

A radius of 2.71 Earth radii
A mass of 7.80 Earth masses
Surface gravity around 1.06 g
An orbital period of 6.967 days
Semi-major axis 0.0867 AU
Equilibrium temperature 1,774 K (1501 °C)
Distance from Earth 3,006.45 light-years
Earth Similarity Index 0.126
Travel time at Voyager 1 speed 53,018,810 years

Kepler-1543 b Planet Profile

Physical Specs

Radius

2.71 R⊕

Radius (Jupiter)

0.242 R♃

Mass

7.80 M⊕

Mass (Jupiter)

0.025 M♃

Density

2.15 g/cm³

Surface Gravity

1.06 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.126

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

#849of 1978

top 42.9%

This planet

2.71R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-48 c 2.71 R⊕ Kepler-355 c 2.71 R⊕ Kepler-233 c 2.71 R⊕

Metric	Earth	Kepler-1543 b	Jupiter
Radius (R⊕)	1.00	2.71	11.21
Mass (M⊕)	1.00	7.80	317.83
Density (g/cm³)	5.51	2.15	1.33
Surface Gravity (g)	1.00	1.06	2.53
Insolation (S⊕)	1.00	375.65	0.037

Star Catalogue Identifiers

TIC

TIC 272843289

Gaia DR2

Gaia DR2 2080362899835391360

Gaia DR3

Gaia DR3 2080362899836411136

System

Kepler-1543

Percentile among Sub-Neptune cohort

Radius 2.710 R⊕ · percentile 57 / cohort 1978

Mass 7.800 M⊕ · percentile 52 / cohort 1978

Orbital period 6.97 d · percentile 22 / cohort 1946

Distance 921.78 pc · percentile 73 / cohort 1975

ESI 0.126 · percentile 1 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

6.967 days

Semi-major axis

0.0867 AU

Eccentricity

0.000

Inclination

82.12 °

Year Length

A year here lasts approximately 6.97 Earth days (1.9% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0867 AU.

Transit Fingerprint

Depth

0.024 %

Duration

3.643 h

Impact parameter b

0.552

Rp / R★

0.014558

Transit midpoint (BJD)

2,454,971.2415

Photometric dip

Transit produces a flux drop of 235 ppm lasting ≈ 3.64 h.

Extended Orbital Architecture

Planet / star radius ratio

0.014558

Semi-major axis / stellar radius

6.610

Impact parameter (b)

0.552

Transit mid-time (BJD)

2,454,971.2415

Angular separation (arcsec)

0.09410

Eq. Temperature

1,774K

(1501 °C)

Insolation (S⊕)

375.65

Earth = 1.00

Earth Similarity (ESI)

0.126

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-1543

Spectral Class

F-type yellow-white

Effective Temperature

6,561 K — hotter than the Sun (5,778 K)

Estimated Age

1.91 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.650 R☉

Stellar Mass

1.390 M☉

Metallicity [Fe/H]

0.07

Extended Stellar Properties

Surface gravity (log g)

4.140 dex

Stellar density

0.754 g/cm³

Systemic radial velocity

-7.87 km/s

Rotational v·sin i

35.00 km/s

Metallicity ratio

[Fe/H]

Distance

921.78 parsec

Light-years 3,006.45 ly

V-band magnitude

13.50 mag

Voyager-speed travel 53,018,810 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.056 mas

Total Proper Motion

12.997 mas/yr

PM Right Ascension

-5.01 mas/yr

PM Declination

-11.99 mas/yr

Galactic Cartesian (pc)

x = 0.311 · y = -0.607 · z = 0.732

Equatorial (J2000)

RA 297.12429° · Dec 47.03699°

Galactic ℓ, b

80.709° · 10.616°

Ecliptic λ, β

319.491° · 65.879°

HTM-20 index

1307369002