Key parameters at a glance

A radius of 1.01 Earth radii
A mass of 1.01 Earth masses
Surface gravity around 0.99 g
An orbital period of 3.857 days
Semi-major axis 0.0466 AU
Equilibrium temperature 972 K (699 °C)
Distance from Earth 1,370.56 light-years
Earth Similarity Index 0.334
Travel time at Voyager 1 speed 24,169,761 years

Kepler-1081 b Planet Profile

Physical Specs

Radius

1.01 R⊕

Radius (Jupiter)

0.090 R♃

Mass

1.01 M⊕

Mass (Jupiter)

0.003 M♃

Density

5.39 g/cm³

Surface Gravity

0.99 g (Earth)

Classification

Planet Type

Rocky Terrestrial

ESI Score 0.334

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

#326of 570

top 57.0%

This planet

1.01R⊕

Rocky Terrestrial median

1.01R⊕

Nearest-size peers

Kepler-1278 b 1.01 R⊕ Kepler-282 b 1.01 R⊕ Kepler-398 c 1.01 R⊕

Metric	Earth	Kepler-1081 b	Jupiter
Radius (R⊕)	1.00	1.01	11.21
Mass (M⊕)	1.00	1.01	317.83
Density (g/cm³)	5.51	5.39	1.33
Surface Gravity (g)	1.00	0.99	2.53
Insolation (S⊕)	1.00	225.22	0.037

Star Catalogue Identifiers

TIC

TIC 122066167

Gaia DR2

Gaia DR2 2101476065707700480

Gaia DR3

Gaia DR3 2101476065707700480

System

Kepler-1081

Percentile among Rocky Terrestrial cohort

Radius 1.010 R⊕ · percentile 42 / cohort 570

Mass 1.010 M⊕ · percentile 37 / cohort 570

Orbital period 3.86 d · percentile 42 / cohort 567

Distance 420.22 pc · percentile 55 / cohort 566

ESI 0.334 · percentile 47 / cohort 570

Orbit & Habitability

Orbital Dynamics

Period

3.857 days

Semi-major axis

0.0466 AU

Eccentricity

0.000

Inclination

87.90 °

Year Length

A year here lasts approximately 3.86 Earth days (1.1% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0466 AU.

Transit Fingerprint

Depth

0.013 %

Duration

1.984 h

Impact parameter b

0.113

Rp / R★

0.010965

Transit midpoint (BJD)

2,454,967.4717

Photometric dip

Transit produces a flux drop of 128 ppm lasting ≈ 1.98 h.

Extended Orbital Architecture

Planet / star radius ratio

0.010965

Semi-major axis / stellar radius

14.932

Impact parameter (b)

0.113

Transit mid-time (BJD)

2,454,967.4717

Angular separation (arcsec)

0.11100

Eq. Temperature

972K

(699 °C)

Insolation (S⊕)

225.22

Earth = 1.00

Earth Similarity (ESI)

0.334

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-1081

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,345 K — cooler than the Sun (5,778 K)

Estimated Age

4.68 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

0.840 R☉

Stellar Mass

0.880 M☉

Metallicity [Fe/H]

0.01

Extended Stellar Properties

Surface gravity (log g)

4.540 dex

Stellar density

1.550 g/cm³

Metallicity ratio

[Fe/H]

Distance

420.22 parsec

Light-years 1,370.56 ly

V-band magnitude

13.83 mag

Voyager-speed travel 24,169,761 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

2.351 mas

Total Proper Motion

56.652 mas/yr

PM Right Ascension

34.44 mas/yr

PM Declination

44.98 mas/yr

Galactic Cartesian (pc)

x = 0.250 · y = -0.708 · z = 0.660

Equatorial (J2000)

RA 289.44475° · Dec 41.31797°

Galactic ℓ, b

72.969° · 12.968°

Ecliptic λ, β

302.851° · 62.557°

HTM-20 index

-1367848643