Key parameters at a glance

A radius of 2.06 Earth radii
A mass of 4.90 Earth masses
Surface gravity around 1.15 g
An orbital period of 9.768 days
Semi-major axis 0.0863 AU
Equilibrium temperature 749 K (476 °C)
Distance from Earth 1,466.96 light-years
Earth Similarity Index 0.364
Travel time at Voyager 1 speed 25,869,867 years

Kepler-958 b Planet Profile

Physical Specs

Radius

2.06 R⊕

Radius (Jupiter)

0.184 R♃

Mass

4.90 M⊕

Mass (Jupiter)

0.015 M♃

Density

3.08 g/cm³

Surface Gravity

1.15 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.364

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

#1875of 1978

top 94.7%

This planet

2.06R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-377 c 2.06 R⊕ TOI-1670 b 2.06 R⊕ K2-117 c 2.06 R⊕

Metric	Earth	Kepler-958 b	Jupiter
Radius (R⊕)	1.00	2.06	11.21
Mass (M⊕)	1.00	4.90	317.83
Density (g/cm³)	5.51	3.08	1.33
Surface Gravity (g)	1.00	1.15	2.53
Insolation (S⊕)	1.00	73.59	0.037

Star Catalogue Identifiers

TIC

TIC 158416263

Gaia DR2

Gaia DR2 2130326460543631360

Gaia DR3

Gaia DR3 2130326460543631360

System

Kepler-958

Percentile among Sub-Neptune cohort

Radius 2.060 R⊕ · percentile 5 / cohort 1978

Mass 4.900 M⊕ · percentile 6 / cohort 1978

Orbital period 9.77 d · percentile 33 / cohort 1946

Distance 449.77 pc · percentile 44 / cohort 1975

ESI 0.364 · percentile 44 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

9.768 days

Semi-major axis

0.0863 AU

Eccentricity

0.000

Inclination

86.73 °

Year Length

A year here lasts approximately 9.77 Earth days (2.7% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0863 AU.

Transit Fingerprint

Depth

0.060 %

Duration

1.947 h

Impact parameter b

0.938

Rp / R★

0.022223

Transit midpoint (BJD)

2,454,972.4378

Photometric dip

Transit produces a flux drop of 600 ppm lasting ≈ 1.95 h.

Extended Orbital Architecture

Planet / star radius ratio

0.022223

Semi-major axis / stellar radius

38.570

Impact parameter (b)

0.938

Transit mid-time (BJD)

2,454,972.4378

Angular separation (arcsec)

0.19200

Eq. Temperature

749K

(476 °C)

Insolation (S⊕)

73.59

Earth = 1.00

Earth Similarity (ESI)

0.364

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-958

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,421 K — cooler than the Sun (5,778 K)

Estimated Age

4.37 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.860 R☉

Stellar Mass

0.910 M☉

Metallicity [Fe/H]

0.01

Extended Stellar Properties

Surface gravity (log g)

4.530 dex

Stellar density

1.570 g/cm³

Metallicity ratio

[Fe/H]

Distance

449.77 parsec

Light-years 1,466.96 ly

V-band magnitude

13.91 mag

Voyager-speed travel 25,869,867 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

2.194 mas

Total Proper Motion

12.029 mas/yr

PM Right Ascension

-4.71 mas/yr

PM Declination

-11.07 mas/yr

Galactic Cartesian (pc)

x = 0.206 · y = -0.663 · z = 0.720

Equatorial (J2000)

RA 287.25666° · Dec 46.06672°

Galactic ℓ, b

76.809° · 16.322°

Ecliptic λ, β

302.627° · 67.561°

HTM-20 index

-1148864386