Key parameters at a glance

A radius of 2.48 Earth radii
A mass of 6.71 Earth masses
Surface gravity around 1.09 g
An orbital period of 19.808 days
Semi-major axis 0.1399 AU
Equilibrium temperature 624 K (351 °C)
Distance from Earth 3,676.17 light-years
Earth Similarity Index 0.406
Travel time at Voyager 1 speed 64,829,246 years

Kepler-846 b Planet Profile

Physical Specs

Radius

2.48 R⊕

Radius (Jupiter)

0.221 R♃

Mass

6.71 M⊕

Mass (Jupiter)

0.021 M♃

Density

2.42 g/cm³

Surface Gravity

1.09 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.406

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

#1212of 1978

top 61.2%

This planet

2.48R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

K2-15 b 2.48 R⊕ Kepler-256 d 2.48 R⊕ Kepler-266 b 2.48 R⊕

Metric	Earth	Kepler-846 b	Jupiter
Radius (R⊕)	1.00	2.48	11.21
Mass (M⊕)	1.00	6.71	317.83
Density (g/cm³)	5.51	2.42	1.33
Surface Gravity (g)	1.00	1.09	2.53
Insolation (S⊕)	1.00	35.28	0.037

Star Catalogue Identifiers

TIC

TIC 399911496

Gaia DR2

Gaia DR2 2131294885469721984

Gaia DR3

Gaia DR3 2131294885469721984

System

Kepler-846

Percentile among Sub-Neptune cohort

Radius 2.480 R⊕ · percentile 38 / cohort 1978

Mass 6.710 M⊕ · percentile 36 / cohort 1978

Orbital period 19.81 d · percentile 62 / cohort 1946

Distance 1,127.12 pc · percentile 84 / cohort 1975

ESI 0.406 · percentile 53 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

19.808 days

Semi-major axis

0.1399 AU

Eccentricity

0.000

Inclination

89.93 °

Year Length

A year here lasts approximately 19.81 Earth days (5.4% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1399 AU.

Transit Fingerprint

Depth

0.062 %

Duration

3.524 h

Impact parameter b

0.191

Rp / R★

0.024736

Transit midpoint (BJD)

2,454,972.3779

Photometric dip

Transit produces a flux drop of 616 ppm lasting ≈ 3.52 h.

Extended Orbital Architecture

Planet / star radius ratio

0.024736

Semi-major axis / stellar radius

43.230

Impact parameter (b)

0.191

Transit mid-time (BJD)

2,454,972.3779

Angular separation (arcsec)

0.12400

Eq. Temperature

624K

(351 °C)

Insolation (S⊕)

35.28

Earth = 1.00

Earth Similarity (ESI)

0.406

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-846

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,579 K — cooler than the Sun (5,778 K)

Estimated Age

4.37 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.910 R☉

Stellar Mass

0.940 M☉

Metallicity [Fe/H]

0.00

Extended Stellar Properties

Surface gravity (log g)

4.500 dex

Stellar density

3.896 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,127.12 parsec

Light-years 3,676.17 ly

V-band magnitude

15.68 mag

Voyager-speed travel 64,829,246 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.859 mas

Total Proper Motion

0.551 mas/yr

PM Right Ascension

-0.37 mas/yr

PM Declination

0.41 mas/yr

Galactic Cartesian (pc)

x = 0.192 · y = -0.627 · z = 0.755

Equatorial (J2000)

RA 287.05707° · Dec 49.04601°

Galactic ℓ, b

79.646° · 17.558°

Ecliptic λ, β

305.004° · 70.419°

HTM-20 index

679085076