Key parameters at a glance

A radius of 2.07 Earth radii
A mass of 4.92 Earth masses
Surface gravity around 1.15 g
An orbital period of 10.613 days
Semi-major axis 0.0957 AU
Equilibrium temperature 987 K (714 °C)
Distance from Earth 2,045.56 light-years
Earth Similarity Index 0.272
Travel time at Voyager 1 speed 36,073,375 years

Kepler-1879 b Planet Profile

Physical Specs

Radius

2.07 R⊕

Radius (Jupiter)

0.184 R♃

Mass

4.92 M⊕

Mass (Jupiter)

0.016 M♃

Density

3.07 g/cm³

Surface Gravity

1.15 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.272

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

#1873of 1978

top 94.6%

This planet

2.07R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-1837 b 2.07 R⊕ Kepler-92 d 2.07 R⊕ Kepler-1679 b 2.07 R⊕

Metric	Earth	Kepler-1879 b	Jupiter
Radius (R⊕)	1.00	2.07	11.21
Mass (M⊕)	1.00	4.92	317.83
Density (g/cm³)	5.51	3.07	1.33
Surface Gravity (g)	1.00	1.15	2.53
Insolation (S⊕)	1.00	242.60	0.037

Star Catalogue Identifiers

TIC

TIC 121944984

Gaia DR2

Gaia DR2 2102232083029221504

Gaia DR3

Gaia DR3 2102232083029221504

System

Kepler-1879

Percentile among Sub-Neptune cohort

Radius 2.065 R⊕ · percentile 5 / cohort 1978

Mass 4.920 M⊕ · percentile 7 / cohort 1978

Orbital period 10.61 d · percentile 36 / cohort 1946

Distance 627.17 pc · percentile 55 / cohort 1975

ESI 0.272 · percentile 21 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

10.613 days

Semi-major axis

0.0957 AU

Eccentricity

0.000

Inclination

89.57 °

Year Length

A year here lasts approximately 10.61 Earth days (2.9% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0957 AU.

Transit Fingerprint

Depth

0.015 %

Duration

0.983 h

Impact parameter b

0.342

Rp / R★

0.011648

Transit midpoint (BJD)

2,454,968.6898

Photometric dip

Transit produces a flux drop of 150 ppm lasting ≈ 0.98 h.

Extended Orbital Architecture

Planet / star radius ratio

0.011648

Semi-major axis / stellar radius

35.000

Impact parameter (b)

0.342

Transit mid-time (BJD)

2,454,968.6898

Angular separation (arcsec)

0.15300

Eq. Temperature

987K

(714 °C)

Insolation (S⊕)

242.60

Earth = 1.00

Earth Similarity (ESI)

0.272

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-1879

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,865 K — hotter than the Sun (5,778 K)

Estimated Age

7.94 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

1.388 R☉

Stellar Mass

1.023 M☉

Metallicity [Fe/H]

0.00

Extended Stellar Properties

Surface gravity (log g)

4.163 dex

Stellar density

59.712 g/cm³

Metallicity ratio

[Fe/H]

Distance

627.17 parsec

Light-years 2,045.56 ly

V-band magnitude

12.83 mag

Voyager-speed travel 36,073,375 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.566 mas

Total Proper Motion

11.363 mas/yr

PM Right Ascension

7.22 mas/yr

PM Declination

8.77 mas/yr

Galactic Cartesian (pc)

x = 0.248 · y = -0.706 · z = 0.663

Equatorial (J2000)

RA 289.36442° · Dec 41.53326°

Galactic ℓ, b

73.144° · 13.113°

Ecliptic λ, β

302.860° · 62.780°

HTM-20 index

-1498115993