Key parameters at a glance

A radius of 1.11 Earth radii
A mass of 1.41 Earth masses
Surface gravity around 1.14 g
An orbital period of 1.139 days
Semi-major axis 0.0220 AU
Equilibrium temperature 2,537 K (2264 °C)
Distance from Earth 2,173.29 light-years
Earth Similarity Index 0.106
Travel time at Voyager 1 speed 38,325,937 years

Kepler-1531 b Planet Profile

Physical Specs

Radius

1.11 R⊕

Radius (Jupiter)

0.099 R♃

Mass

1.41 M⊕

Mass (Jupiter)

0.004 M♃

Density

5.67 g/cm³

Surface Gravity

1.14 g (Earth)

Classification

Planet Type

Rocky Terrestrial

ESI Score 0.106

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

#209of 570

top 36.5%

This planet

1.11R⊕

Rocky Terrestrial median

1.01R⊕

Nearest-size peers

Kepler-124 d 1.11 R⊕ Kepler-327 b 1.11 R⊕ Kepler-333 c 1.11 R⊕

Metric	Earth	Kepler-1531 b	Jupiter
Radius (R⊕)	1.00	1.11	11.21
Mass (M⊕)	1.00	1.41	317.83
Density (g/cm³)	5.51	5.67	1.33
Surface Gravity (g)	1.00	1.14	2.53
Insolation (S⊕)	1.00	4,457.20	0.037

Star Catalogue Identifiers

TIC

TIC 120424814

Gaia DR2

Gaia DR2 2100303539632796032

Gaia DR3

Gaia DR3 2100303539632796032

System

Kepler-1531

Percentile among Rocky Terrestrial cohort

Radius 1.110 R⊕ · percentile 61 / cohort 570

Mass 1.410 M⊕ · percentile 56 / cohort 570

Orbital period 1.14 d · percentile 13 / cohort 567

Distance 666.33 pc · percentile 77 / cohort 566

ESI 0.106 · percentile 1 / cohort 570

Orbit & Habitability

Orbital Dynamics

Period

1.139 days

Semi-major axis

0.0220 AU

Eccentricity

0.000

Inclination

81.07 °

Year Length

A year here lasts approximately 1.14 Earth days (0.3% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0220 AU.

Transit Fingerprint

Depth

0.007 %

Duration

2.092 h

Impact parameter b

0.199

Rp / R★

0.007639

Transit midpoint (BJD)

2,454,965.4657

Photometric dip

Transit produces a flux drop of 66 ppm lasting ≈ 2.09 h.

Extended Orbital Architecture

Planet / star radius ratio

0.007639

Semi-major axis / stellar radius

4.151

Impact parameter (b)

0.199

Transit mid-time (BJD)

2,454,965.4657

Angular separation (arcsec)

0.03310

Eq. Temperature

2,537K

(2264 °C)

Insolation (S⊕)

4,457.20

Earth = 1.00

Earth Similarity (ESI)

0.106

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-1531

Spectral Class

F-type yellow-white

Effective Temperature

6,260 K — hotter than the Sun (5,778 K)

Estimated Age

2.82 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.270 R☉

Stellar Mass

1.160 M☉

Metallicity [Fe/H]

-0.03

Extended Stellar Properties

Surface gravity (log g)

4.290 dex

Stellar density

0.530 g/cm³

Metallicity ratio

[Fe/H]

Distance

666.33 parsec

Light-years 2,173.29 ly

V-band magnitude

13.20 mag

Voyager-speed travel 38,325,937 yr

Multi-band Host Photometry — 17 bands

Astrometric Data

Parallax

1.472 mas

Total Proper Motion

4.262 mas/yr

PM Right Ascension

3.76 mas/yr

PM Declination

2.01 mas/yr

Galactic Cartesian (pc)

x = 0.202 · y = -0.746 · z = 0.634

Equatorial (J2000)

RA 285.14662° · Dec 39.37081°

Galactic ℓ, b

69.768° · 15.176°

Ecliptic λ, β

295.040° · 61.500°

HTM-20 index

-486880157