Key parameters at a glance

A radius of 1.14 Earth radii
A mass of 1.55 Earth masses
Surface gravity around 1.19 g
An orbital period of 9.652 days
Semi-major axis 0.0865 AU
Equilibrium temperature 890 K (617 °C)
Distance from Earth 2,118.87 light-years
Earth Similarity Index 0.358
Travel time at Voyager 1 speed 37,366,314 years

1 sibling around Kepler-804

Kepler-804 c shares its host star with 1 other confirmed planet. Side-by-side measurements below.

Planet	Type	Radius (R⊕)	Mass (M⊕)	Period (d)	Eq. T (K)	Year
Kepler-804 c this	Rocky Terrestrial	1.14	1.55	9.652	890	2016
Kepler-804 b	Super-Earth	1.94	4.42	14.375	779	2016

Kepler-804 c Planet Profile

Physical Specs

Radius

1.14 R⊕

Radius (Jupiter)

0.102 R♃

Mass

1.55 M⊕

Mass (Jupiter)

0.005 M♃

Density

5.75 g/cm³

Surface Gravity

1.19 g (Earth)

Classification

Planet Type

Rocky Terrestrial

ESI Score 0.358

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

#169of 570

top 29.5%

This planet

1.14R⊕

Rocky Terrestrial median

1.01R⊕

Nearest-size peers

Kepler-320 b 1.14 R⊕ Kepler-303 c 1.14 R⊕ Kepler-1456 b 1.14 R⊕

Metric	Earth	Kepler-804 c	Jupiter
Radius (R⊕)	1.00	1.14	11.21
Mass (M⊕)	1.00	1.55	317.83
Density (g/cm³)	5.51	5.75	1.33
Surface Gravity (g)	1.00	1.19	2.53
Insolation (S⊕)	1.00	141.84	0.037

Star Catalogue Identifiers

TIC

TIC 275573295

Gaia DR2

Gaia DR2 2126432677554353280

Gaia DR3

Gaia DR3 2126432677554353280

System

Kepler-804

Percentile among Rocky Terrestrial cohort

Radius 1.140 R⊕ · percentile 69 / cohort 570

Mass 1.550 M⊕ · percentile 63 / cohort 570

Orbital period 9.65 d · percentile 77 / cohort 567

Distance 649.65 pc · percentile 76 / cohort 566

ESI 0.358 · percentile 52 / cohort 570

Orbit & Habitability

Orbital Dynamics

Period

9.652 days

Semi-major axis

0.0865 AU

Eccentricity

0.000

Inclination

89.59 °

Year Length

A year here lasts approximately 9.65 Earth days (2.6% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0865 AU.

Transit Fingerprint

Depth

0.010 %

Duration

4.457 h

Impact parameter b

0.122

Rp / R★

0.010429

Transit midpoint (BJD)

2,454,965.1595

Photometric dip

Transit produces a flux drop of 103 ppm lasting ≈ 4.46 h.

Extended Orbital Architecture

Planet / star radius ratio

0.010429

Semi-major axis / stellar radius

17.200

Impact parameter (b)

0.122

Transit mid-time (BJD)

2,454,965.1595

Angular separation (arcsec)

0.13300

Eq. Temperature

890K

(617 °C)

Insolation (S⊕)

141.84

Earth = 1.00

Earth Similarity (ESI)

0.358

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-804

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,817 K — hotter than the Sun (5,778 K)

Estimated Age

5.25 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

1.050 R☉

Stellar Mass

1.010 M☉

Metallicity [Fe/H]

0.00

Extended Stellar Properties

Surface gravity (log g)

4.400 dex

Stellar density

0.810 g/cm³

Metallicity ratio

[Fe/H]

Distance

649.65 parsec

Light-years 2,118.87 ly

V-band magnitude

13.86 mag

Voyager-speed travel 37,366,314 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.511 mas

Total Proper Motion

6.930 mas/yr

PM Right Ascension

-6.56 mas/yr

PM Declination

2.22 mas/yr

Galactic Cartesian (pc)

x = 0.282 · y = -0.652 · z = 0.704

Equatorial (J2000)

RA 293.37221° · Dec 44.78518°

Galactic ℓ, b

77.442° · 11.886°

Ecliptic λ, β

311.559° · 64.888°

HTM-20 index

-1857977837