Key parameters at a glance

A radius of 2.27 Earth radii
A mass of 5.77 Earth masses
Surface gravity around 1.12 g
An orbital period of 19.792 days
Semi-major axis 0.1534 AU
Equilibrium temperature 736 K (463 °C)
Distance from Earth 4,344.14 light-years
Earth Similarity Index 0.357
Travel time at Voyager 1 speed 76,608,852 years

Kepler-1103 b Planet Profile

Physical Specs

Radius

2.27 R⊕

Radius (Jupiter)

0.203 R♃

Mass

5.77 M⊕

Mass (Jupiter)

0.018 M♃

Density

2.71 g/cm³

Surface Gravity

1.12 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.357

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

#1554of 1978

top 78.5%

This planet

2.27R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-121 c 2.27 R⊕ Kepler-267 d 2.27 R⊕ Kepler-306 e 2.27 R⊕

Metric	Earth	Kepler-1103 b	Jupiter
Radius (R⊕)	1.00	2.27	11.21
Mass (M⊕)	1.00	5.77	317.83
Density (g/cm³)	5.51	2.71	1.33
Surface Gravity (g)	1.00	1.12	2.53
Insolation (S⊕)	1.00	160.28	0.037

Star Catalogue Identifiers

TIC

TIC 399951202

Gaia DR2

Gaia DR2 2132808608042844160

Gaia DR3

Gaia DR3 2132808608042844160

System

Kepler-1103

Percentile among Sub-Neptune cohort

Radius 2.270 R⊕ · percentile 21 / cohort 1978

Mass 5.770 M⊕ · percentile 21 / cohort 1978

Orbital period 19.79 d · percentile 62 / cohort 1946

Distance 1,331.92 pc · percentile 89 / cohort 1975

ESI 0.357 · percentile 42 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

19.792 days

Semi-major axis

0.1534 AU

Eccentricity

0.000

Inclination

86.29 °

Year Length

A year here lasts approximately 19.79 Earth days (5.4% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1534 AU.

Transit Fingerprint

Depth

0.039 %

Duration

3.172 h

Impact parameter b

0.189

Rp / R★

0.018110

Transit midpoint (BJD)

2,454,982.3085

Photometric dip

Transit produces a flux drop of 386 ppm lasting ≈ 3.17 h.

Extended Orbital Architecture

Planet / star radius ratio

0.018110

Semi-major axis / stellar radius

47.700

Impact parameter (b)

0.189

Transit mid-time (BJD)

2,454,982.3085

Angular separation (arcsec)

0.11500

Eq. Temperature

736K

(463 °C)

Insolation (S⊕)

160.28

Earth = 1.00

Earth Similarity (ESI)

0.357

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-1103

Spectral Class

F-type yellow-white

Effective Temperature

6,092 K — hotter than the Sun (5,778 K)

Estimated Age

3.31 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.150 R☉

Stellar Mass

1.110 M☉

Metallicity [Fe/H]

-0.01

Extended Stellar Properties

Surface gravity (log g)

4.360 dex

Stellar density

0.280 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,331.92 parsec

Light-years 4,344.14 ly

V-band magnitude

14.29 mag

Voyager-speed travel 76,608,852 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.722 mas

Total Proper Motion

7.153 mas/yr

PM Right Ascension

2.10 mas/yr

PM Declination

6.84 mas/yr

Galactic Cartesian (pc)

x = 0.194 · y = -0.620 · z = 0.760

Equatorial (J2000)

RA 287.38213° · Dec 49.45242°

Galactic ℓ, b

80.124° · 17.510°

Ecliptic λ, β

306.033° · 70.724°

HTM-20 index

709650404