Key parameters at a glance

A radius of 1.85 Earth radii
A mass of 4.08 Earth masses
Surface gravity around 1.19 g
An orbital period of 9.490 days
Semi-major axis 0.0895 AU
Equilibrium temperature 926 K (653 °C)
Distance from Earth 3,163.45 light-years
Earth Similarity Index 0.303
Travel time at Voyager 1 speed 55,787,363 years

Kepler-641 b Planet Profile

Physical Specs

Radius

1.85 R⊕

Radius (Jupiter)

0.165 R♃

Mass

4.08 M⊕

Mass (Jupiter)

0.013 M♃

Density

3.54 g/cm³

Surface Gravity

1.19 g (Earth)

Classification

Planet Type

Super-Earth

ESI Score 0.303

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

#189of 1176

top 16.0%

This planet

1.85R⊕

Super-Earth median

1.60R⊕

Nearest-size peers

Kepler-350 b 1.85 R⊕ Kepler-948 b 1.85 R⊕ Kepler-217 c 1.85 R⊕

Metric	Earth	Kepler-641 b	Jupiter
Radius (R⊕)	1.00	1.85	11.21
Mass (M⊕)	1.00	4.08	317.83
Density (g/cm³)	5.51	3.54	1.33
Surface Gravity (g)	1.00	1.19	2.53
Insolation (S⊕)	1.00	311.79	0.037

Star Catalogue Identifiers

TIC

TIC 63006978

Gaia DR2

Gaia DR2 2125777643502580864

Gaia DR3

Gaia DR3 2125777643502580864

System

Kepler-641

Percentile among Super-Earth cohort

Radius 1.850 R⊕ · percentile 83 / cohort 1176

Mass 4.080 M⊕ · percentile 76 / cohort 1176

Orbital period 9.49 d · percentile 64 / cohort 1164

Distance 969.92 pc · percentile 79 / cohort 1171

ESI 0.303 · percentile 37 / cohort 1176

Orbit & Habitability

Orbital Dynamics

Period

9.490 days

Semi-major axis

0.0895 AU

Eccentricity

0.000

Inclination

86.44 °

Year Length

A year here lasts approximately 9.49 Earth days (2.6% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0895 AU.

Transit Fingerprint

Depth

0.026 %

Duration

3.528 h

Impact parameter b

0.476

Rp / R★

0.015331

Transit midpoint (BJD)

2,455,004.9291

Photometric dip

Transit produces a flux drop of 262 ppm lasting ≈ 3.53 h.

Extended Orbital Architecture

Planet / star radius ratio

0.015331

Semi-major axis / stellar radius

18.440

Impact parameter (b)

0.476

Transit mid-time (BJD)

2,455,004.9291

Angular separation (arcsec)

0.09230

Eq. Temperature

926K

(653 °C)

Insolation (S⊕)

311.79

Earth = 1.00

Earth Similarity (ESI)

0.303

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-641

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,713 K — cooler than the Sun (5,778 K)

Estimated Age

7.08 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

1.130 R☉

Stellar Mass

1.020 M☉

Metallicity [Fe/H]

0.15

Extended Stellar Properties

Surface gravity (log g)

4.330 dex

Stellar density

0.260 g/cm³

Metallicity ratio

[Fe/H]

Distance

969.92 parsec

Light-years 3,163.45 ly

V-band magnitude

13.81 mag

Voyager-speed travel 55,787,363 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.002 mas

Total Proper Motion

6.991 mas/yr

PM Right Ascension

3.36 mas/yr

PM Declination

-6.13 mas/yr

Galactic Cartesian (pc)

x = 0.274 · y = -0.684 · z = 0.676

Equatorial (J2000)

RA 291.82353° · Dec 42.51619°

Galactic ℓ, b

74.856° · 11.884°

Ecliptic λ, β

307.351° · 63.153°

HTM-20 index

-347843562