Key parameters at a glance

A radius of 3.23 Earth radii
A mass of 10.50 Earth masses
Surface gravity around 1.01 g
An orbital period of 34.459 days
Semi-major axis 0.2039 AU
Equilibrium temperature 559 K (286 °C)
Distance from Earth 5,415.66 light-years
Earth Similarity Index 0.406
Travel time at Voyager 1 speed 95,505,111 years

Kepler-1875 b Planet Profile

Physical Specs

Radius

3.23 R⊕

Radius (Jupiter)

0.288 R♃

Mass

10.50 M⊕

Mass (Jupiter)

0.033 M♃

Density

1.72 g/cm³

Surface Gravity

1.01 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.406

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

#331of 1978

top 16.7%

This planet

3.23R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

TOI-5704 b 3.23 R⊕ Kepler-1636 b 3.23 R⊕ HD 12235 b 3.23 R⊕

Metric	Earth	Kepler-1875 b	Jupiter
Radius (R⊕)	1.00	3.23	11.21
Mass (M⊕)	1.00	10.50	317.83
Density (g/cm³)	5.51	1.72	1.33
Surface Gravity (g)	1.00	1.01	2.53
Insolation (S⊕)	1.00	23.05	0.037

Star Catalogue Identifiers

TIC

TIC 27912377

Gaia DR2

Gaia DR2 2135305805109041152

Gaia DR3

Gaia DR3 2135305805109041152

System

Kepler-1875

Percentile among Sub-Neptune cohort

Radius 3.227 R⊕ · percentile 83 / cohort 1978

Mass 10.500 M⊕ · percentile 76 / cohort 1978

Orbital period 34.46 d · percentile 77 / cohort 1946

Distance 1,660.45 pc · percentile 95 / cohort 1975

ESI 0.406 · percentile 53 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

34.459 days

Semi-major axis

0.2039 AU

Eccentricity

0.000

Inclination

88.74 °

Year Length

A year here lasts approximately 34.46 Earth days (9.4% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.2039 AU.

Transit Fingerprint

Depth

0.043 %

Duration

7.434 h

Impact parameter b

0.626

Rp / R★

0.019948

Transit midpoint (BJD)

2,454,980.8294

Photometric dip

Transit produces a flux drop of 431 ppm lasting ≈ 7.43 h.

Extended Orbital Architecture

Planet / star radius ratio

0.019948

Semi-major axis / stellar radius

28.000

Impact parameter (b)

0.626

Transit mid-time (BJD)

2,454,980.8294

Angular separation (arcsec)

0.12300

Eq. Temperature

559K

(286 °C)

Insolation (S⊕)

23.05

Earth = 1.00

Earth Similarity (ESI)

0.406

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-1875

Spectral Class

F-type yellow-white

Effective Temperature

6,161 K — hotter than the Sun (5,778 K)

Estimated Age

0.30 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.862 R☉

Stellar Mass

0.950 M☉

Metallicity [Fe/H]

-0.50

Extended Stellar Properties

Surface gravity (log g)

4.545 dex

Stellar density

0.370 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,660.45 parsec

Light-years 5,415.66 ly

V-band magnitude

15.20 mag

Voyager-speed travel 95,505,111 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.575 mas

Total Proper Motion

6.208 mas/yr

PM Right Ascension

-4.16 mas/yr

PM Declination

-4.61 mas/yr

Galactic Cartesian (pc)

x = 0.288 · y = -0.572 · z = 0.768

Equatorial (J2000)

RA 296.77274° · Dec 50.18837°

Galactic ℓ, b

83.429° · 12.313°

Ecliptic λ, β

322.797° · 68.772°

HTM-20 index

-137590741