Key parameters at a glance

A radius of 3.00 Earth radii
A mass of 9.27 Earth masses
Surface gravity around 1.03 g
An orbital period of 5.249 days
Semi-major axis 0.0602 AU
Equilibrium temperature 1,056 K (783 °C)
Distance from Earth 1,777.35 light-years
Earth Similarity Index 0.219
Travel time at Voyager 1 speed 31,343,587 years

Kepler-956 b Planet Profile

Physical Specs

Radius

3.00 R⊕

Radius (Jupiter)

0.268 R♃

Mass

9.27 M⊕

Mass (Jupiter)

0.029 M♃

Density

1.89 g/cm³

Surface Gravity

1.03 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.219

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

#521of 1978

top 26.3%

This planet

3.00R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-338 d 3.00 R⊕ HD 3167 c 3.00 R⊕ HIP 94235 b 3.00 R⊕

Metric	Earth	Kepler-956 b	Jupiter
Radius (R⊕)	1.00	3.00	11.21
Mass (M⊕)	1.00	9.27	317.83
Density (g/cm³)	5.51	1.89	1.33
Surface Gravity (g)	1.00	1.03	2.53
Insolation (S⊕)	1.00	307.06	0.037

Star Catalogue Identifiers

TIC

TIC 424867045

Gaia DR2

Gaia DR2 2129703552846891136

Gaia DR3

Gaia DR3 2129703552846891136

System

Kepler-956

Percentile among Sub-Neptune cohort

Radius 3.000 R⊕ · percentile 73 / cohort 1978

Mass 9.270 M⊕ · percentile 67 / cohort 1978

Orbital period 5.25 d · percentile 13 / cohort 1946

Distance 544.94 pc · percentile 49 / cohort 1975

ESI 0.219 · percentile 10 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

5.249 days

Semi-major axis

0.0602 AU

Eccentricity

0.000

Inclination

86.00 °

Year Length

A year here lasts approximately 5.25 Earth days (1.4% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0602 AU.

Transit Fingerprint

Depth

0.062 %

Duration

1.842 h

Impact parameter b

0.653

Rp / R★

0.024106

Transit midpoint (BJD)

2,454,968.5163

Photometric dip

Transit produces a flux drop of 621 ppm lasting ≈ 1.84 h.

Extended Orbital Architecture

Planet / star radius ratio

0.024106

Semi-major axis / stellar radius

12.140

Impact parameter (b)

0.653

Transit mid-time (BJD)

2,454,968.5163

Angular separation (arcsec)

0.11000

Eq. Temperature

1,056K

(783 °C)

Insolation (S⊕)

307.06

Earth = 1.00

Earth Similarity (ESI)

0.219

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched.

Detection Signatures

Transit photometry

A transit dip has been observed from at least one telescope.

Transit timing variations

Gravitational interactions from neighbours have been detected.

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-956

Spectral Class

F-type yellow-white

Effective Temperature

6,040 K — hotter than the Sun (5,778 K)

Estimated Age

3.47 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.150 R☉

Stellar Mass

1.100 M☉

Metallicity [Fe/H]

0.02

Extended Stellar Properties

Surface gravity (log g)

4.360 dex

Stellar density

1.110 g/cm³

Metallicity ratio

[Fe/H]

Distance

544.94 parsec

Light-years 1,777.35 ly

V-band magnitude

13.39 mag

Voyager-speed travel 31,343,587 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.806 mas

Total Proper Motion

17.262 mas/yr

PM Right Ascension

-0.90 mas/yr

PM Declination

-17.24 mas/yr

Galactic Cartesian (pc)

x = 0.251 · y = -0.605 · z = 0.755

Equatorial (J2000)

RA 292.53083° · Dec 49.06166°

Galactic ℓ, b

81.135° · 14.270°

Ecliptic λ, β

314.574° · 69.040°

HTM-20 index

768675550