Key parameters at a glance

A radius of 2.71 Earth radii
A mass of 7.81 Earth masses
Surface gravity around 1.06 g
An orbital period of 5.824 days
Semi-major axis 0.0615 AU
Equilibrium temperature 955 K (682 °C)
Distance from Earth 3,533.18 light-years
Earth Similarity Index 0.255
Travel time at Voyager 1 speed 62,307,674 years

Kepler-1748 b Planet Profile

Physical Specs

Radius

2.71 R⊕

Radius (Jupiter)

0.242 R♃

Mass

7.81 M⊕

Mass (Jupiter)

0.025 M♃

Density

2.15 g/cm³

Surface Gravity

1.06 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.255

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

#845of 1978

top 42.7%

This planet

2.71R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

K2-182 b 2.71 R⊕ K2-250 b 2.71 R⊕ EPIC 220674823 c 2.71 R⊕

Metric	Earth	Kepler-1748 b	Jupiter
Radius (R⊕)	1.00	2.71	11.21
Mass (M⊕)	1.00	7.81	317.83
Density (g/cm³)	5.51	2.15	1.33
Surface Gravity (g)	1.00	1.06	2.53
Insolation (S⊕)	1.00	196.33	0.037

Star Catalogue Identifiers

TIC

TIC 158112888

Gaia DR2

Gaia DR2 2106499562532338944

Gaia DR3

Gaia DR3 2106499562532338944

System

Kepler-1748

Percentile among Sub-Neptune cohort

Radius 2.713 R⊕ · percentile 57 / cohort 1978

Mass 7.810 M⊕ · percentile 53 / cohort 1978

Orbital period 5.82 d · percentile 16 / cohort 1946

Distance 1,083.28 pc · percentile 83 / cohort 1975

ESI 0.255 · percentile 18 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

5.824 days

Semi-major axis

0.0615 AU

Eccentricity

0.000

Inclination

85.35 °

Year Length

A year here lasts approximately 5.82 Earth days (1.6% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0615 AU.

Transit Fingerprint

Depth

0.089 %

Duration

2.244 h

Impact parameter b

0.931

Rp / R★

0.028719

Transit midpoint (BJD)

2,455,187.9960

Photometric dip

Transit produces a flux drop of 889 ppm lasting ≈ 2.24 h.

Extended Orbital Architecture

Planet / star radius ratio

0.028719

Semi-major axis / stellar radius

7.800

Impact parameter (b)

0.931

Transit mid-time (BJD)

2,455,187.9960

Angular separation (arcsec)

0.05680

Eq. Temperature

955K

(682 °C)

Insolation (S⊕)

196.33

Earth = 1.00

Earth Similarity (ESI)

0.255

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

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-1748

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,774 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

0.864 R☉

Stellar Mass

0.916 M☉

Metallicity [Fe/H]

-0.22

Extended Stellar Properties

Surface gravity (log g)

4.526 dex

Stellar density

0.705 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,083.28 parsec

Light-years 3,533.18 ly

V-band magnitude

16.00 mag

Voyager-speed travel 62,307,674 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.895 mas

Total Proper Motion

5.183 mas/yr

PM Right Ascension

1.11 mas/yr

PM Declination

5.06 mas/yr

Galactic Cartesian (pc)

x = 0.192 · y = -0.671 · z = 0.716

Equatorial (J2000)

RA 285.96790° · Dec 45.73908°

Galactic ℓ, b

76.141° · 17.030°

Ecliptic λ, β

300.131° · 67.515°

HTM-20 index

-1229706409