Key parameters at a glance

A radius of 3.55 Earth radii
A mass of 12.30 Earth masses
Surface gravity around 0.98 g
An orbital period of 10.117 days
Semi-major axis 0.1024 AU
Equilibrium temperature 1,163 K (890 °C)
Distance from Earth 4,836.05 light-years
Earth Similarity Index 0.184
Travel time at Voyager 1 speed 85,283,657 years

Kepler-812 b Planet Profile

Physical Specs

Radius

3.55 R⊕

Radius (Jupiter)

0.317 R♃

Mass

12.30 M⊕

Mass (Jupiter)

0.039 M♃

Density

1.51 g/cm³

Surface Gravity

0.98 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.184

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

#155of 1978

top 7.8%

This planet

3.55R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-1015 b 3.55 R⊕ Kepler-1562 b 3.55 R⊕ K2-178 b 3.56 R⊕

Metric	Earth	Kepler-812 b	Jupiter
Radius (R⊕)	1.00	3.55	11.21
Mass (M⊕)	1.00	12.30	317.83
Density (g/cm³)	5.51	1.51	1.33
Surface Gravity (g)	1.00	0.98	2.53
Insolation (S⊕)	1.00	421.92	0.037

Star Catalogue Identifiers

TIC

TIC 299033074

Gaia DR2

Gaia DR2 2130968334816264576

Gaia DR3

Gaia DR3 2130968334816264576

System

Kepler-812

Percentile among Sub-Neptune cohort

Radius 3.550 R⊕ · percentile 92 / cohort 1978

Mass 12.300 M⊕ · percentile 85 / cohort 1978

Orbital period 10.12 d · percentile 35 / cohort 1946

Distance 1,482.74 pc · percentile 93 / cohort 1975

ESI 0.184 · percentile 5 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

10.117 days

Semi-major axis

0.1024 AU

Eccentricity

0.000

Inclination

88.95 °

Year Length

A year here lasts approximately 10.12 Earth days (2.8% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1024 AU.

Transit Fingerprint

Depth

0.029 %

Duration

4.939 h

Impact parameter b

0.848

Rp / R★

0.018635

Transit midpoint (BJD)

2,454,970.4446

Photometric dip

Transit produces a flux drop of 289 ppm lasting ≈ 4.94 h.

Extended Orbital Architecture

Planet / star radius ratio

0.018635

Semi-major axis / stellar radius

8.910

Impact parameter (b)

0.848

Transit mid-time (BJD)

2,454,970.4446

Angular separation (arcsec)

0.06910

Eq. Temperature

1,163K

(890 °C)

Insolation (S⊕)

421.92

Earth = 1.00

Earth Similarity (ESI)

0.184

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-812

Spectral Class

F-type yellow-white

Effective Temperature

6,761 K — hotter than the Sun (5,778 K)

Estimated Age

1.66 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.710 R☉

Stellar Mass

1.450 M☉

Metallicity [Fe/H]

0.02

Extended Stellar Properties

Surface gravity (log g)

4.130 dex

Stellar density

0.771 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,482.74 parsec

Light-years 4,836.05 ly

V-band magnitude

13.82 mag

Voyager-speed travel 85,283,657 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.646 mas

Total Proper Motion

5.851 mas/yr

PM Right Ascension

-2.09 mas/yr

PM Declination

-5.47 mas/yr

Galactic Cartesian (pc)

x = 0.215 · y = -0.631 · z = 0.746

Equatorial (J2000)

RA 288.85528° · Dec 48.20852°

Galactic ℓ, b

79.304° · 16.142°

Ecliptic λ, β

307.362° · 69.214°

HTM-20 index

279565251