Key parameters at a glance

A radius of 2.52 Earth radii
A mass of 6.90 Earth masses
Surface gravity around 1.09 g
An orbital period of 7.407 days
Semi-major axis 0.0745 AU
Equilibrium temperature 938 K (665 °C)
Distance from Earth 5,564.19 light-years
Earth Similarity Index 0.267
Travel time at Voyager 1 speed 98,124,463 years

Kepler-748 b Planet Profile

Physical Specs

Radius

2.52 R⊕

Radius (Jupiter)

0.225 R♃

Mass

6.90 M⊕

Mass (Jupiter)

0.022 M♃

Density

2.37 g/cm³

Surface Gravity

1.09 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.267

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

#1147of 1978

top 57.9%

This planet

2.52R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-129 c 2.52 R⊕ TOI-1749 d 2.52 R⊕ Kepler-361 c 2.52 R⊕

Metric	Earth	Kepler-748 b	Jupiter
Radius (R⊕)	1.00	2.52	11.21
Mass (M⊕)	1.00	6.90	317.83
Density (g/cm³)	5.51	2.37	1.33
Surface Gravity (g)	1.00	1.09	2.53
Insolation (S⊕)	1.00	439.78	0.037

Star Catalogue Identifiers

TIC

TIC 137545963

Gaia DR2

Gaia DR2 2051722855314502400

Gaia DR3

Gaia DR3 2051722855314502400

System

Kepler-748

Percentile among Sub-Neptune cohort

Radius 2.520 R⊕ · percentile 42 / cohort 1978

Mass 6.900 M⊕ · percentile 39 / cohort 1978

Orbital period 7.41 d · percentile 24 / cohort 1946

Distance 1,705.99 pc · percentile 95 / cohort 1975

ESI 0.267 · percentile 20 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

7.407 days

Semi-major axis

0.0745 AU

Eccentricity

0.000

Inclination

89.89 °

Year Length

A year here lasts approximately 7.41 Earth days (2.0% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0745 AU.

Transit Fingerprint

Depth

0.044 %

Duration

3.580 h

Impact parameter b

0.042

Rp / R★

0.021213

Transit midpoint (BJD)

2,455,188.4952

Photometric dip

Transit produces a flux drop of 442 ppm lasting ≈ 3.58 h.

Extended Orbital Architecture

Planet / star radius ratio

0.021213

Semi-major axis / stellar radius

16.137

Impact parameter (b)

0.042

Transit mid-time (BJD)

2,455,188.4952

Angular separation (arcsec)

0.04370

Eq. Temperature

938K

(665 °C)

Insolation (S⊕)

439.78

Earth = 1.00

Earth Similarity (ESI)

0.267

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-748

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,934 K — hotter than the Sun (5,778 K)

Estimated Age

3.72 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.100 R☉

Stellar Mass

1.070 M☉

Metallicity [Fe/H]

0.08

Extended Stellar Properties

Surface gravity (log g)

4.380 dex

Stellar density

1.449 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,705.99 parsec

Light-years 5,564.19 ly

V-band magnitude

15.37 mag

Voyager-speed travel 98,124,463 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.558 mas

Total Proper Motion

2.159 mas/yr

PM Right Ascension

-0.09 mas/yr

PM Declination

-2.16 mas/yr

Galactic Cartesian (pc)

x = 0.302 · y = -0.737 · z = 0.605

Equatorial (J2000)

RA 292.26288° · Dec 37.23697°

Galactic ℓ, b

70.209° · 9.216°

Ecliptic λ, β

304.715° · 58.023°

HTM-20 index

-2024634370