Key parameters at a glance

A radius of 1.85 Earth radii
A mass of 4.08 Earth masses
Surface gravity around 1.19 g
An orbital period of 7.768 days
Semi-major axis 0.0749 AU
Equilibrium temperature 841 K (568 °C)
Distance from Earth 2,831.09 light-years
Earth Similarity Index 0.335
Travel time at Voyager 1 speed 49,926,261 years

Kepler-948 b Planet Profile

Physical Specs

Radius

1.85 R⊕

Radius (Jupiter)

0.165 R♃

Mass

4.08 M⊕

Mass (Jupiter)

0.013 M♃

Density

3.54 g/cm³

Surface Gravity

1.19 g (Earth)

Classification

Planet Type

Super-Earth

ESI Score 0.335

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

#189of 1176

top 16.0%

This planet

1.85R⊕

Super-Earth median

1.60R⊕

Nearest-size peers

Kepler-641 b 1.85 R⊕ Kepler-217 c 1.85 R⊕ Kepler-350 b 1.85 R⊕

Metric	Earth	Kepler-948 b	Jupiter
Radius (R⊕)	1.00	1.85	11.21
Mass (M⊕)	1.00	4.08	317.83
Density (g/cm³)	5.51	3.54	1.33
Surface Gravity (g)	1.00	1.19	2.53
Insolation (S⊕)	1.00	126.20	0.037

Star Catalogue Identifiers

TIC

TIC 138099276

Gaia DR2

Gaia DR2 2077595394707557120

Gaia DR3

Gaia DR3 2077595394707557120

System

Kepler-948

Percentile among Super-Earth cohort

Radius 1.850 R⊕ · percentile 83 / cohort 1176

Mass 4.080 M⊕ · percentile 76 / cohort 1176

Orbital period 7.77 d · percentile 56 / cohort 1164

Distance 868.02 pc · percentile 73 / cohort 1171

ESI 0.335 · percentile 47 / cohort 1176

Orbit & Habitability

Orbital Dynamics

Period

7.768 days

Semi-major axis

0.0749 AU

Eccentricity

0.000

Inclination

88.68 °

Year Length

A year here lasts approximately 7.77 Earth days (2.1% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0749 AU.

Transit Fingerprint

Depth

0.022 %

Duration

4.385 h

Impact parameter b

0.353

Rp / R★

0.017815

Transit midpoint (BJD)

2,454,971.0625

Photometric dip

Transit produces a flux drop of 218 ppm lasting ≈ 4.39 h.

Extended Orbital Architecture

Planet / star radius ratio

0.017815

Semi-major axis / stellar radius

4.820

Impact parameter (b)

0.353

Transit mid-time (BJD)

2,454,971.0625

Angular separation (arcsec)

0.08630

Eq. Temperature

841K

(568 °C)

Insolation (S⊕)

126.20

Earth = 1.00

Earth Similarity (ESI)

0.335

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-948

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,679 K — cooler than the Sun (5,778 K)

Estimated Age

4.17 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.940 R☉

Stellar Mass

0.960 M☉

Metallicity [Fe/H]

-0.02

Extended Stellar Properties

Surface gravity (log g)

4.470 dex

Stellar density

1.123 g/cm³

Metallicity ratio

[Fe/H]

Distance

868.02 parsec

Light-years 2,831.09 ly

V-band magnitude

14.81 mag

Voyager-speed travel 49,926,261 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.124 mas

Total Proper Motion

7.454 mas/yr

PM Right Ascension

7.45 mas/yr

PM Declination

0.19 mas/yr

Galactic Cartesian (pc)

x = 0.296 · y = -0.688 · z = 0.663

Equatorial (J2000)

RA 293.30028° · Dec 41.52332°

Galactic ℓ, b

74.451° · 10.459°

Ecliptic λ, β

308.883° · 61.853°

HTM-20 index

-938507904