Key parameters at a glance

A radius of 2.66 Earth radii
A mass of 7.56 Earth masses
Surface gravity around 1.07 g
An orbital period of 51.329 days
Semi-major axis 0.2731 AU
Equilibrium temperature 546 K (273 °C)
Distance from Earth 4,064.07 light-years
Earth Similarity Index 0.448
Travel time at Voyager 1 speed 71,669,815 years

Kepler-1102 b Planet Profile

Physical Specs

Radius

2.66 R⊕

Radius (Jupiter)

0.237 R♃

Mass

7.56 M⊕

Mass (Jupiter)

0.024 M♃

Density

2.21 g/cm³

Surface Gravity

1.07 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.448

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

#928of 1978

top 46.9%

This planet

2.66R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-346 b 2.66 R⊕ KOI-351 e 2.66 R⊕ Kepler-1987 d 2.66 R⊕

Metric	Earth	Kepler-1102 b	Jupiter
Radius (R⊕)	1.00	2.66	11.21
Mass (M⊕)	1.00	7.56	317.83
Density (g/cm³)	5.51	2.21	1.33
Surface Gravity (g)	1.00	1.07	2.53
Insolation (S⊕)	1.00	22.98	0.037

Star Catalogue Identifiers

TIC

TIC 47976987

Gaia DR2

Gaia DR2 2119646801021958272

Gaia DR3

Gaia DR3 2119646801021958272

System

Kepler-1102

Percentile among Sub-Neptune cohort

Radius 2.660 R⊕ · percentile 52 / cohort 1978

Mass 7.560 M⊕ · percentile 48 / cohort 1978

Orbital period 51.33 d · percentile 86 / cohort 1946

Distance 1,246.05 pc · percentile 88 / cohort 1975

ESI 0.448 · percentile 62 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

51.329 days

Semi-major axis

0.2731 AU

Eccentricity

0.000

Inclination

89.06 °

Year Length

A year here lasts approximately 51.33 Earth days (14.1% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.2731 AU.

Transit Fingerprint

Depth

0.069 %

Duration

9.439 h

Impact parameter b

0.836

Rp / R★

0.025624

Transit midpoint (BJD)

2,455,010.6724

Photometric dip

Transit produces a flux drop of 692 ppm lasting ≈ 9.44 h.

Extended Orbital Architecture

Planet / star radius ratio

0.025624

Semi-major axis / stellar radius

24.000

Impact parameter (b)

0.836

Transit mid-time (BJD)

2,455,010.6724

Angular separation (arcsec)

0.21900

Eq. Temperature

546K

(273 °C)

Insolation (S⊕)

22.98

Earth = 1.00

Earth Similarity (ESI)

0.448

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-1102

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,724 K — cooler than the Sun (5,778 K)

Estimated Age

4.37 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.940 R☉

Stellar Mass

0.960 M☉

Metallicity [Fe/H]

-0.08

Extended Stellar Properties

Surface gravity (log g)

4.480 dex

Stellar density

0.318 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,246.05 parsec

Light-years 4,064.07 ly

V-band magnitude

14.93 mag

Voyager-speed travel 71,669,815 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.774 mas

Total Proper Motion

6.193 mas/yr

PM Right Ascension

5.65 mas/yr

PM Declination

-2.54 mas/yr

Galactic Cartesian (pc)

x = 0.131 · y = -0.655 · z = 0.744

Equatorial (J2000)

RA 281.32259° · Dec 48.06650°

Galactic ℓ, b

77.320° · 20.804°

Ecliptic λ, β

293.253° · 70.593°

HTM-20 index

1154074240