Key parameters at a glance

A radius of 2.57 Earth radii
A mass of 7.13 Earth masses
Surface gravity around 1.08 g
An orbital period of 9.977 days
Semi-major axis 0.0919 AU
Equilibrium temperature 1,028 K (755 °C)
Distance from Earth 5,180.69 light-years
Earth Similarity Index 0.240
Travel time at Voyager 1 speed 91,361,543 years

Kepler-1758 b Planet Profile

Physical Specs

Radius

2.57 R⊕

Radius (Jupiter)

0.229 R♃

Mass

7.13 M⊕

Mass (Jupiter)

0.022 M♃

Density

2.31 g/cm³

Surface Gravity

1.08 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.240

HZ Position Inner

Controversial No

Discovery

Year 2021

Method Transit

Facility Kepler

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#1073of 1978

top 54.2%

This planet

2.57R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-1549 b 2.57 R⊕ Kepler-245 b 2.57 R⊕ Kepler-313 c 2.57 R⊕

Metric	Earth	Kepler-1758 b	Jupiter
Radius (R⊕)	1.00	2.57	11.21
Mass (M⊕)	1.00	7.13	317.83
Density (g/cm³)	5.51	2.31	1.33
Surface Gravity (g)	1.00	1.08	2.53
Insolation (S⊕)	1.00	93.64	0.037

Star Catalogue Identifiers

TIC

TIC 169932440

Gaia DR2

Gaia DR2 2073662166743600896

Gaia DR3

Gaia DR3 2073662166743600896

System

Kepler-1758

Percentile among Sub-Neptune cohort

Radius 2.571 R⊕ · percentile 46 / cohort 1978

Mass 7.130 M⊕ · percentile 42 / cohort 1978

Orbital period 9.98 d · percentile 34 / cohort 1946

Distance 1,588.41 pc · percentile 94 / cohort 1975

ESI 0.240 · percentile 14 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

9.977 days

Semi-major axis

0.0919 AU

Eccentricity

0.000

Inclination

89.99 °

Year Length

A year here lasts approximately 9.98 Earth days (2.7% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0919 AU.

Transit Fingerprint

Depth

0.025 %

Duration

5.908 h

Impact parameter b

0.812

Rp / R★

0.014328

Transit midpoint (BJD)

2,454,970.2361

Photometric dip

Transit produces a flux drop of 253 ppm lasting ≈ 5.91 h.

Extended Orbital Architecture

Planet / star radius ratio

0.014328

Semi-major axis / stellar radius

7.800

Impact parameter (b)

0.812

Transit mid-time (BJD)

2,454,970.2361

Angular separation (arcsec)

0.05790

Eq. Temperature

1,028K

(755 °C)

Insolation (S⊕)

93.64

Earth = 1.00

Earth Similarity (ESI)

0.240

0 = alien, 1 = Earth-identical

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

Discovery Paper

Primary reference

Valizadegan et al. 2022

Instrument

Kepler CCD Array

Publication

2022-02

Observation locale

Space

Discovery cohort

Planets confirmed in 2021 at Kepler (12 shown).

Kepler-1816 b · Super-Earth Kepler-1705 c · Sub-Neptune Kepler-1948 b · Rocky Terrestrial Kepler-196 d · Sub-Neptune Kepler-1853 b · Super-Earth Kepler-1840 b · Sub-Neptune Kepler-1881 b · Sub-Neptune Kepler-1858 b · Sub-Neptune Kepler-1874 b · Sub-Neptune Kepler-1802 c · Sub-Neptune Kepler-1749 b · Super-Earth Kepler-1849 b · Sub-Neptune

Host System: Kepler-1758

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,557 K — cooler than the Sun (5,778 K)

Estimated Age

0.40 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.616 R☉

Stellar Mass

1.035 M☉

Metallicity [Fe/H]

0.16

Extended Stellar Properties

Surface gravity (log g)

4.037 dex

Stellar density

0.427 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,588.41 parsec

Light-years 5,180.69 ly

V-band magnitude

15.12 mag

Voyager-speed travel 91,361,543 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.602 mas

Total Proper Motion

15.952 mas/yr

PM Right Ascension

-13.83 mas/yr

PM Declination

-7.94 mas/yr

Galactic Cartesian (pc)

x = 0.358 · y = -0.678 · z = 0.642

Equatorial (J2000)

RA 297.79682° · Dec 39.92134°

Galactic ℓ, b

74.678° · 6.701°

Ecliptic λ, β

314.243° · 59.165°

HTM-20 index

-1771058275