Key parameters at a glance

A radius of 1.23 Earth radii
A mass of 2.04 Earth masses
Surface gravity around 1.35 g
An orbital period of 5.037 days
Semi-major axis 0.0632 AU
Equilibrium temperature 1,321 K (1048 °C)
Distance from Earth 1,730.77 light-years
Earth Similarity Index 0.227
Travel time at Voyager 1 speed 30,522,179 years

Kepler-1104 b Planet Profile

Physical Specs

Radius

1.23 R⊕

Radius (Jupiter)

0.110 R♃

Mass

2.04 M⊕

Mass (Jupiter)

0.006 M♃

Density

6.02 g/cm³

Surface Gravity

1.35 g (Earth)

Classification

Planet Type

Rocky Terrestrial

ESI Score 0.227

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

#17of 570

top 2.8%

This planet

1.23R⊕

Rocky Terrestrial median

1.01R⊕

Nearest-size peers

Kepler-252 b 1.23 R⊕ Kepler-271 b 1.23 R⊕ Kepler-197 c 1.23 R⊕

Metric	Earth	Kepler-1104 b	Jupiter
Radius (R⊕)	1.00	1.23	11.21
Mass (M⊕)	1.00	2.04	317.83
Density (g/cm³)	5.51	6.02	1.33
Surface Gravity (g)	1.00	1.35	2.53
Insolation (S⊕)	1.00	813.52	0.037

Star Catalogue Identifiers

TIC

TIC 27186509

Gaia DR2

Gaia DR2 2135002576119495936

Gaia DR3

Gaia DR3 2135002576119495936

System

Kepler-1104

Percentile among Rocky Terrestrial cohort

Radius 1.230 R⊕ · percentile 94 / cohort 570

Mass 2.040 M⊕ · percentile 86 / cohort 570

Orbital period 5.04 d · percentile 54 / cohort 567

Distance 530.66 pc · percentile 67 / cohort 566

ESI 0.227 · percentile 18 / cohort 570

Orbit & Habitability

Orbital Dynamics

Period

5.037 days

Semi-major axis

0.0632 AU

Eccentricity

0.000

Inclination

80.72 °

Year Length

A year here lasts approximately 5.04 Earth days (1.4% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0632 AU.

Transit Fingerprint

Depth

0.008 %

Duration

1.885 h

Impact parameter b

0.165

Rp / R★

0.008187

Transit midpoint (BJD)

2,454,967.1094

Photometric dip

Transit produces a flux drop of 78 ppm lasting ≈ 1.88 h.

Extended Orbital Architecture

Planet / star radius ratio

0.008187

Semi-major axis / stellar radius

20.320

Impact parameter (b)

0.165

Transit mid-time (BJD)

2,454,967.1094

Angular separation (arcsec)

0.11900

Eq. Temperature

1,321K

(1048 °C)

Insolation (S⊕)

813.52

Earth = 1.00

Earth Similarity (ESI)

0.227

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-1104

Spectral Class

F-type yellow-white

Effective Temperature

6,417 K — hotter than the Sun (5,778 K)

Estimated Age

2.04 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.410 R☉

Stellar Mass

1.300 M☉

Metallicity [Fe/H]

0.13

Extended Stellar Properties

Surface gravity (log g)

4.250 dex

Stellar density

0.440 g/cm³

Systemic radial velocity

-31.18 km/s

Metallicity ratio

[Fe/H]

Distance

530.66 parsec

Light-years 1,730.77 ly

V-band magnitude

12.13 mag

Voyager-speed travel 30,522,179 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.857 mas

Total Proper Motion

10.696 mas/yr

PM Right Ascension

-0.79 mas/yr

PM Declination

-10.67 mas/yr

Galactic Cartesian (pc)

x = 0.270 · y = -0.593 · z = 0.758

Equatorial (J2000)

RA 294.46852° · Dec 49.33098°

Galactic ℓ, b

81.951° · 13.247°

Ecliptic λ, β

318.059° · 68.724°

HTM-20 index

-521910611