Key parameters at a glance

A radius of 0.85 Earth radii
A mass of 2.40 Earth masses
Surface gravity around 3.30 g
An orbital period of 6.992 days
Semi-major axis 0.0758 AU
Equilibrium temperature 1,299 K (1026 °C)
Distance from Earth 847.79 light-years
Earth Similarity Index 0.184
Travel time at Voyager 1 speed 14,950,839 years

Kepler-1876 b Planet Profile

Physical Specs

Radius

0.85 R⊕

Radius (Jupiter)

0.076 R♃

Mass

2.40 M⊕

Mass (Jupiter)

0.008 M♃

Density

19.00 g/cm³

Surface Gravity

3.30 g (Earth)

Classification

Planet Type

Rocky Terrestrial

ESI Score 0.184

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

#453of 570

top 79.3%

This planet

0.85R⊕

Rocky Terrestrial median

1.01R⊕

Nearest-size peers

Kepler-1385 b 0.85 R⊕ Kepler-406 c 0.85 R⊕ Kepler-352 b 0.86 R⊕

Metric	Earth	Kepler-1876 b	Jupiter
Radius (R⊕)	1.00	0.85	11.21
Mass (M⊕)	1.00	2.40	317.83
Density (g/cm³)	5.51	19.00	1.33
Surface Gravity (g)	1.00	3.30	2.53
Insolation (S⊕)	1.00	475.00	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	2.400 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

TIC

TIC 171883078

Gaia DR2

Gaia DR2 2075132209486310912

Gaia DR3

Gaia DR3 2075132209486310912

System

Kepler-1876

Percentile among Rocky Terrestrial cohort

Radius 0.853 R⊕ · percentile 21 / cohort 570

Mass 2.400 M⊕ · percentile 92 / cohort 570

Orbital period 6.99 d · percentile 67 / cohort 567

Distance 259.94 pc · percentile 36 / cohort 566

ESI 0.184 · percentile 11 / cohort 570

Orbit & Habitability

Orbital Dynamics

Period

6.992 days

Semi-major axis

0.0758 AU

Eccentricity

0.098

Inclination

89.13 °

Year Length

A year here lasts approximately 6.99 Earth days (1.9% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0758 AU.

Transit Fingerprint

Depth

0.003 %

Duration

4.842 h

Impact parameter b

0.063

Rp / R★

0.005296

Transit midpoint (BJD)

2,454,971.0510

Photometric dip

Transit produces a flux drop of 33 ppm lasting ≈ 4.84 h.

Extended Orbital Architecture

Planet / star radius ratio

0.005296

Semi-major axis / stellar radius

11.083

Impact parameter (b)

0.063

RV semi-amplitude (K)

0.710 m/s

Transit mid-time (BJD)

2,454,971.0510

Angular separation (arcsec)

0.29200

Eq. Temperature

1,299K

(1026 °C)

Insolation (S⊕)

475.00

Earth = 1.00

Earth Similarity (ESI)

0.184

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched.

Detection Signatures

Transit photometry

A transit dip has been observed from at least one telescope.

Radial velocity

Stellar wobble has been measured spectroscopically.

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-1876

Spectral Class

F-type yellow-white

Effective Temperature

6,104 K — hotter than the Sun (5,778 K)

Estimated Age

4.40 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.477 R☉

Stellar Mass

1.187 M☉

Metallicity [Fe/H]

0.01

Extended Stellar Properties

Surface gravity (log g)

4.071 dex

Stellar density

0.360 g/cm³

Metallicity ratio

[Fe/H]

Distance

259.94 parsec

Light-years 847.79 ly

V-band magnitude

10.79 mag

Voyager-speed travel 14,950,839 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

3.818 mas

Total Proper Motion

15.499 mas/yr

PM Right Ascension

1.47 mas/yr

PM Declination

15.43 mas/yr

Galactic Cartesian (pc)

x = 0.367 · y = -0.658 · z = 0.658

Equatorial (J2000)

RA 299.16049° · Dec 41.14380°

Galactic ℓ, b

76.267° · 6.425°

Ecliptic λ, β

317.041° · 59.910°

HTM-20 index

-201665052