Key parameters at a glance

A radius of 5.23 Earth radii
A mass of 23.80 Earth masses
Surface gravity around 0.87 g
An orbital period of 124.420 days
Semi-major axis 0.4790 AU
Equilibrium temperature 416 K (143 °C)
Distance from Earth 3,258.17 light-years
Earth Similarity Index 0.425
Travel time at Voyager 1 speed 57,457,847 years

Kepler-841 b Planet Profile

Physical Specs

Radius

5.23 R⊕

Radius (Jupiter)

0.467 R♃

Mass

23.80 M⊕

Mass (Jupiter)

0.075 M♃

Density

0.91 g/cm³

Surface Gravity

0.87 g (Earth)

Classification

Planet Type

Neptune-like

ESI Score 0.425

HZ Position Inner

Controversial No

Discovery

Year 2016

Method Transit

Facility Kepler

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#352of 574

top 61.1%

This planet

5.23R⊕

Neptune-like median

6.39R⊕

Nearest-size peers

Kepler-495 b 5.23 R⊕ Kepler-418 c 5.22 R⊕ TOI-5238 b 5.22 R⊕

Metric	Earth	Kepler-841 b	Jupiter
Radius (R⊕)	1.00	5.23	11.21
Mass (M⊕)	1.00	23.80	317.83
Density (g/cm³)	5.51	0.91	1.33
Surface Gravity (g)	1.00	0.87	2.53
Insolation (S⊕)	1.00	1.65	0.037

Star Catalogue Identifiers

TIC

TIC 267569980

Gaia DR2

Gaia DR2 2131804165512770176

Gaia DR3

Gaia DR3 2131804165512770176

System

Kepler-841

Percentile among Neptune-like cohort

Radius 5.230 R⊕ · percentile 39 / cohort 574

Mass 23.800 M⊕ · percentile 40 / cohort 574

Orbital period 124.42 d · percentile 84 / cohort 524

Distance 998.96 pc · percentile 74 / cohort 572

ESI 0.425 · percentile 78 / cohort 574

Orbit & Habitability

Orbital Dynamics

Period

124.420 days

Semi-major axis

0.4790 AU

Eccentricity

0.000

Inclination

90.00 °

Year Length

A year here lasts approximately 124.42 Earth days (34.1% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.4790 AU.

Transit Fingerprint

Depth

0.411 %

Duration

3.661 h

Impact parameter b

0.014

Rp / R★

0.059377

Transit midpoint (BJD)

2,454,983.5960

Photometric dip

Transit produces a flux drop of 4,107 ppm lasting ≈ 3.66 h.

Extended Orbital Architecture

Planet / star radius ratio

0.059377

Semi-major axis / stellar radius

270.020

Impact parameter (b)

0.014

Transit mid-time (BJD)

2,454,983.5960

Angular separation (arcsec)

0.47900

Eq. Temperature

416K

(143 °C)

Insolation (S⊕)

1.65

Earth = 1.00

Earth Similarity (ESI)

0.425

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

Morton et al. 2016

Instrument

Kepler CCD Array

Publication

2016-05

Observation locale

Space

Discovery cohort

Planets confirmed in 2016 at Kepler (12 shown).

Kepler-1512 b · Rocky Terrestrial Kepler-1410 b · Super-Earth Kepler-560 b · Super-Earth Kepler-1389 b · Super-Earth Kepler-1450 b · Super-Earth Kepler-1544 b · Super-Earth Kepler-1459 b · Super-Earth Kepler-1638 b · Super-Earth Kepler-737 b · Super-Earth Kepler-1185 b · Super-Earth Kepler-1178 b · Rocky Terrestrial Kepler-1040 b · Sub-Neptune

Host System: Kepler-841

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,324 K — cooler than the Sun (5,778 K)

Estimated Age

4.47 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.810 R☉

Stellar Mass

0.850 M☉

Metallicity [Fe/H]

-0.09

Extended Stellar Properties

Surface gravity (log g)

4.560 dex

Stellar density

25.369 g/cm³

Metallicity ratio

[Fe/H]

Distance

998.96 parsec

Light-years 3,258.17 ly

V-band magnitude

15.79 mag

Voyager-speed travel 57,457,847 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.973 mas

Total Proper Motion

8.610 mas/yr

PM Right Ascension

7.62 mas/yr

PM Declination

-4.01 mas/yr

Galactic Cartesian (pc)

x = 0.162 · y = -0.638 · z = 0.753

Equatorial (J2000)

RA 284.25136° · Dec 48.80960°

Galactic ℓ, b

78.733° · 19.202°

Ecliptic λ, β

299.519° · 70.792°

HTM-20 index

-456803553