Key parameters at a glance

A radius of 0.73 Earth radii
A mass of 0.31 Earth masses
Surface gravity around 0.59 g
An orbital period of 1.386 days
Semi-major axis 0.0206 AU
Equilibrium temperature 1,008 K (735 °C)
Distance from Earth 816.04 light-years
Earth Similarity Index 0.293
Travel time at Voyager 1 speed 14,390,848 years
Almost certainly tidally locked to its host star given the close orbit

Kepler-1850 b Planet Profile

Physical Specs

Radius

0.73 R⊕

Radius (Jupiter)

0.065 R♃

Mass

0.31 M⊕

Mass (Jupiter)

0.001 M♃

Density

4.44 g/cm³

Surface Gravity

0.59 g (Earth)

Classification

Planet Type

Rocky Terrestrial

ESI Score 0.293

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

#521of 570

top 91.2%

This planet

0.73R⊕

Rocky Terrestrial median

1.01R⊕

Nearest-size peers

Kepler-124 b 0.73 R⊕ Kepler-42 c 0.73 R⊕ Kepler-1371 b 0.73 R⊕

Metric	Earth	Kepler-1850 b	Jupiter
Radius (R⊕)	1.00	0.73	11.21
Mass (M⊕)	1.00	0.31	317.83
Density (g/cm³)	5.51	4.44	1.33
Surface Gravity (g)	1.00	0.59	2.53
Insolation (S⊕)	1.00	245.15	0.037

Star Catalogue Identifiers

TIC

TIC 158389981

Gaia DR2

Gaia DR2 2106001651264391040

Gaia DR3

Gaia DR3 2106001651264391040

System

Kepler-1850

Percentile among Rocky Terrestrial cohort

Radius 0.729 R⊕ · percentile 9 / cohort 570

Mass 0.313 M⊕ · percentile 7 / cohort 570

Orbital period 1.39 d · percentile 15 / cohort 567

Distance 250.20 pc · percentile 35 / cohort 566

ESI 0.293 · percentile 37 / cohort 570

Orbit & Habitability

Orbital Dynamics

Period

1.386 days

Semi-major axis

0.0206 AU

Eccentricity

0.000

Inclination

86.72 °

Year Length

A year here lasts approximately 1.39 Earth days (0.4% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0206 AU.

Transit Fingerprint

Depth

0.009 %

Duration

1.645 h

Impact parameter b

0.520

Rp / R★

0.008438

Transit midpoint (BJD)

2,454,968.4886

Photometric dip

Transit produces a flux drop of 93 ppm lasting ≈ 1.64 h.

Extended Orbital Architecture

Planet / star radius ratio

0.008438

Semi-major axis / stellar radius

6.373

Impact parameter (b)

0.520

Transit mid-time (BJD)

2,454,968.4886

Angular separation (arcsec)

0.08230

Eq. Temperature

1,008K

(735 °C)

Insolation (S⊕)

245.15

Earth = 1.00

Earth Similarity (ESI)

0.293

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched. 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-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-1850

Spectral Class

K-type orange

Effective Temperature

4,239 K — cooler than the Sun (5,778 K)

Estimated Age

13.80 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

0.600 R☉

Stellar Mass

0.611 M☉

Metallicity [Fe/H]

-0.22

Extended Stellar Properties

Surface gravity (log g)

4.667 dex

Stellar density

2.258 g/cm³

Metallicity ratio

[Fe/H]

Distance

250.20 parsec

Light-years 816.04 ly

V-band magnitude

14.44 mag

Voyager-speed travel 14,390,848 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

3.968 mas

Total Proper Motion

21.824 mas/yr

PM Right Ascension

17.30 mas/yr

PM Declination

13.30 mas/yr

Galactic Cartesian (pc)

x = 0.213 · y = -0.692 · z = 0.690

Equatorial (J2000)

RA 287.14283° · Dec 43.61612°

Galactic ℓ, b

74.426° · 15.452°

Ecliptic λ, β

300.631° · 65.242°

HTM-20 index

1074350196