Key parameters at a glance

A radius of 2.80 Earth radii
A mass of 8.25 Earth masses
Surface gravity around 1.05 g
An orbital period of 2.535 days
Semi-major axis 0.0339 AU
Equilibrium temperature 1,218 K (945 °C)
Distance from Earth 6,538.51 light-years
Earth Similarity Index 0.193
Travel time at Voyager 1 speed 115,306,698 years

Kepler-912 b Planet Profile

Physical Specs

Radius

2.80 R⊕

Radius (Jupiter)

0.250 R♃

Mass

8.25 M⊕

Mass (Jupiter)

0.026 M♃

Density

2.07 g/cm³

Surface Gravity

1.05 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.193

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

#742of 1978

top 37.5%

This planet

2.80R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-694 b 2.80 R⊕ Kepler-276 d 2.80 R⊕ Kepler-350 d 2.80 R⊕

Metric	Earth	Kepler-912 b	Jupiter
Radius (R⊕)	1.00	2.80	11.21
Mass (M⊕)	1.00	8.25	317.83
Density (g/cm³)	5.51	2.07	1.33
Surface Gravity (g)	1.00	1.05	2.53
Insolation (S⊕)	1.00	519.95	0.037

Star Catalogue Identifiers

TIC

TIC 170251516

Gaia DR2

Gaia DR2 2073907392200330112

Gaia DR3

Gaia DR3 2073907392200330112

System

Kepler-912

Percentile among Sub-Neptune cohort

Radius 2.800 R⊕ · percentile 62 / cohort 1978

Mass 8.250 M⊕ · percentile 57 / cohort 1978

Orbital period 2.53 d · percentile 4 / cohort 1946

Distance 2,004.72 pc · percentile 97 / cohort 1975

ESI 0.193 · percentile 6 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

2.535 days

Semi-major axis

0.0339 AU

Eccentricity

0.000

Inclination

68.67 °

Year Length

A year here lasts approximately 2.53 Earth days (0.7% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0339 AU.

Transit Fingerprint

Depth

0.046 %

Duration

4.415 h

Impact parameter b

0.673

Rp / R★

0.022760

Transit midpoint (BJD)

2,454,965.6806

Photometric dip

Transit produces a flux drop of 463 ppm lasting ≈ 4.41 h.

Extended Orbital Architecture

Planet / star radius ratio

0.022760

Semi-major axis / stellar radius

3.480

Impact parameter (b)

0.673

Transit mid-time (BJD)

2,454,965.6806

Angular separation (arcsec)

0.01690

Eq. Temperature

1,218K

(945 °C)

Insolation (S⊕)

519.95

Earth = 1.00

Earth Similarity (ESI)

0.193

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-912

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,998 K — hotter than the Sun (5,778 K)

Estimated Age

3.16 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.110 R☉

Stellar Mass

1.070 M☉

Metallicity [Fe/H]

0.02

Extended Stellar Properties

Surface gravity (log g)

4.370 dex

Stellar density

0.071 g/cm³

Metallicity ratio

[Fe/H]

Distance

2,004.72 parsec

Light-years 6,538.51 ly

V-band magnitude

15.67 mag

Voyager-speed travel 115,306,698 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.471 mas

Total Proper Motion

3.510 mas/yr

PM Right Ascension

-0.56 mas/yr

PM Declination

-3.47 mas/yr

Galactic Cartesian (pc)

x = 0.351 · y = -0.658 · z = 0.666

Equatorial (J2000)

RA 298.11118° · Dec 41.75832°

Galactic ℓ, b

76.400° · 7.414°

Ecliptic λ, β

316.053° · 60.781°

HTM-20 index

-171611817