Key parameters at a glance

A radius of 1.03 Earth radii
A mass of 1.09 Earth masses
Surface gravity around 1.02 g
An orbital period of 15.571 days
Semi-major axis 0.1022 AU
Equilibrium temperature 399 K (126 °C)
Distance from Earth 632.43 light-years
Earth Similarity Index 0.777
Travel time at Voyager 1 speed 11,152,837 years
Almost certainly tidally locked to its host star given the close orbit

Kepler-1948 b Planet Profile

Physical Specs

Radius

1.03 R⊕

Radius (Jupiter)

0.092 R♃

Mass

1.09 M⊕

Mass (Jupiter)

0.003 M♃

Density

5.44 g/cm³

Surface Gravity

1.02 g (Earth)

Classification

Planet Type

Rocky Terrestrial

ESI Score 0.777

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

#295of 570

top 51.6%

This planet

1.03R⊕

Rocky Terrestrial median

1.01R⊕

Nearest-size peers

LP 791-18 d 1.03 R⊕ Kepler-387 b 1.03 R⊕ Kepler-1398 c 1.03 R⊕

Metric	Earth	Kepler-1948 b	Jupiter
Radius (R⊕)	1.00	1.03	11.21
Mass (M⊕)	1.00	1.09	317.83
Density (g/cm³)	5.51	5.44	1.33
Surface Gravity (g)	1.00	1.02	2.53
Insolation (S⊕)	1.00	5.98	0.037

Star Catalogue Identifiers

TIC

TIC 158489110

Gaia DR2

Gaia DR2 2131059972237410560

Gaia DR3

Gaia DR3 2131059972237410560

System

Kepler-1948

Percentile among Rocky Terrestrial cohort

Radius 1.033 R⊕ · percentile 48 / cohort 570

Mass 1.090 M⊕ · percentile 43 / cohort 570

Orbital period 15.57 d · percentile 89 / cohort 567

Distance 193.90 pc · percentile 31 / cohort 566

ESI 0.777 · percentile 86 / cohort 570

Orbit & Habitability

Orbital Dynamics

Period

15.571 days

Semi-major axis

0.1022 AU

Eccentricity

0.000

Inclination

89.64 °

Year Length

A year here lasts approximately 15.57 Earth days (4.3% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1022 AU.

Transit Fingerprint

Depth

0.018 %

Duration

2.155 h

Impact parameter b

0.312

Rp / R★

0.012102

Transit midpoint (BJD)

2,454,969.5851

Photometric dip

Transit produces a flux drop of 177 ppm lasting ≈ 2.16 h.

Extended Orbital Architecture

Planet / star radius ratio

0.012102

Semi-major axis / stellar radius

49.900

Impact parameter (b)

0.312

Transit mid-time (BJD)

2,454,969.5851

Angular separation (arcsec)

0.52700

Eq. Temperature

399K

(126 °C)

Insolation (S⊕)

5.98

Earth = 1.00

Earth Similarity (ESI)

0.777

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water. Close-orbiting tidally-locked around a cool host.

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-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 Kepler-1718 b · Sub-Neptune

Host System: Kepler-1948

Spectral Class

K-type orange

Effective Temperature

3,872 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

0.557 R☉

Stellar Mass

0.585 M☉

Metallicity [Fe/H]

0.12

Extended Stellar Properties

Surface gravity (log g)

4.714 dex

Stellar density

9.704 g/cm³

Metallicity ratio

[Fe/H]

Distance

193.90 parsec

Light-years 632.43 ly

V-band magnitude

14.57 mag

Voyager-speed travel 11,152,837 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

5.129 mas

Total Proper Motion

26.286 mas/yr

PM Right Ascension

4.37 mas/yr

PM Declination

25.92 mas/yr

Galactic Cartesian (pc)

x = 0.201 · y = -0.641 · z = 0.741

Equatorial (J2000)

RA 287.36408° · Dec 47.78530°

Galactic ℓ, b

78.499° · 16.903°

Ecliptic λ, β

304.314° · 69.165°

HTM-20 index

-757868156