Key parameters at a glance

A radius of 2.47 Earth radii
A mass of 6.66 Earth masses
Surface gravity around 1.09 g
An orbital period of 81.315 days
Semi-major axis 0.3483 AU
Equilibrium temperature 393 K (120 °C)
Distance from Earth 2,421.62 light-years
Earth Similarity Index 0.611
Travel time at Voyager 1 speed 42,705,271 years

Kepler-1101 b Planet Profile

Physical Specs

Radius

2.47 R⊕

Radius (Jupiter)

0.220 R♃

Mass

6.66 M⊕

Mass (Jupiter)

0.021 M♃

Density

2.43 g/cm³

Surface Gravity

1.09 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.611

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

#1226of 1978

top 61.9%

This planet

2.47R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-263 c 2.47 R⊕ Kepler-269 b 2.47 R⊕ Kepler-198 c 2.47 R⊕

Metric	Earth	Kepler-1101 b	Jupiter
Radius (R⊕)	1.00	2.47	11.21
Mass (M⊕)	1.00	6.66	317.83
Density (g/cm³)	5.51	2.43	1.33
Surface Gravity (g)	1.00	1.09	2.53
Insolation (S⊕)	1.00	3.58	0.037

Star Catalogue Identifiers

TIC

TIC 271163971

Gaia DR2

Gaia DR2 2080048680026646912

Gaia DR3

Gaia DR3 2080048680026646912

System

Kepler-1101

Percentile among Sub-Neptune cohort

Radius 2.470 R⊕ · percentile 37 / cohort 1978

Mass 6.660 M⊕ · percentile 35 / cohort 1978

Orbital period 81.32 d · percentile 92 / cohort 1946

Distance 742.47 pc · percentile 62 / cohort 1975

ESI 0.611 · percentile 83 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

81.315 days

Semi-major axis

0.3483 AU

Eccentricity

0.000

Inclination

89.99 °

Year Length

A year here lasts approximately 81.32 Earth days (22.3% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.3483 AU.

Transit Fingerprint

Depth

0.078 %

Duration

5.762 h

Impact parameter b

0.139

Rp / R★

0.025338

Transit midpoint (BJD)

2,455,008.9973

Photometric dip

Transit produces a flux drop of 782 ppm lasting ≈ 5.76 h.

Extended Orbital Architecture

Planet / star radius ratio

0.025338

Semi-major axis / stellar radius

109.530

Impact parameter (b)

0.139

Transit mid-time (BJD)

2,455,008.9973

Angular separation (arcsec)

0.46900

Eq. Temperature

393K

(120 °C)

Insolation (S⊕)

3.58

Earth = 1.00

Earth Similarity (ESI)

0.611

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-1101

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,614 K — cooler than the Sun (5,778 K)

Estimated Age

4.27 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.910 R☉

Stellar Mass

0.940 M☉

Metallicity [Fe/H]

-0.04

Extended Stellar Properties

Surface gravity (log g)

4.500 dex

Stellar density

3.758 g/cm³

Metallicity ratio

[Fe/H]

Distance

742.47 parsec

Light-years 2,421.62 ly

V-band magnitude

15.16 mag

Voyager-speed travel 42,705,271 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.318 mas

Total Proper Motion

19.486 mas/yr

PM Right Ascension

-1.47 mas/yr

PM Declination

-19.43 mas/yr

Galactic Cartesian (pc)

x = 0.291 · y = -0.636 · z = 0.715

Equatorial (J2000)

RA 294.56935° · Dec 45.67116°

Galactic ℓ, b

78.638° · 11.535°

Ecliptic λ, β

314.221° · 65.382°

HTM-20 index

-1526956926