Key parameters at a glance

A radius of 2.98 Earth radii
A mass of 9.19 Earth masses
Surface gravity around 1.03 g
An orbital period of 83.578 days
Semi-major axis 0.3591 AU
Equilibrium temperature 655 K (382 °C)
Distance from Earth 2,044.41 light-years
Earth Similarity Index 0.360
Travel time at Voyager 1 speed 36,053,129 years

Kepler-1667 b Planet Profile

Physical Specs

Radius

2.98 R⊕

Radius (Jupiter)

0.266 R♃

Mass

9.19 M⊕

Mass (Jupiter)

0.029 M♃

Density

1.90 g/cm³

Surface Gravity

1.03 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.360

HZ Position Inner

Controversial No

Discovery

Year 2020

Method Transit

Facility Kepler

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#540of 1978

top 27.2%

This planet

2.98R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-457 d 2.98 R⊕ Kepler-1881 b 2.98 R⊕ K2-278 b 2.98 R⊕

Metric	Earth	Kepler-1667 b	Jupiter
Radius (R⊕)	1.00	2.98	11.21
Mass (M⊕)	1.00	9.19	317.83
Density (g/cm³)	5.51	1.90	1.33
Surface Gravity (g)	1.00	1.03	2.53
Insolation (S⊕)	1.00	9.30	0.037

Star Catalogue Identifiers

TIC

TIC 48353636

Gaia DR2

Gaia DR2 2131690988831633792

Gaia DR3

Gaia DR3 2131690988831633792

System

Kepler-1667

Percentile among Sub-Neptune cohort

Radius 2.984 R⊕ · percentile 73 / cohort 1978

Mass 9.190 M⊕ · percentile 67 / cohort 1978

Orbital period 83.58 d · percentile 92 / cohort 1946

Distance 626.82 pc · percentile 55 / cohort 1975

ESI 0.360 · percentile 43 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

83.578 days

Semi-major axis

0.3591 AU

Eccentricity

0.000

Inclination

89.59 °

Year Length

A year here lasts approximately 83.58 Earth days (22.9% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.3590 AU.

Transit Fingerprint

Depth

0.063 %

Duration

7.249 h

Impact parameter b

0.912

Rp / R★

0.027840

Transit midpoint (BJD)

2,455,035.4554

Photometric dip

Transit produces a flux drop of 631 ppm lasting ≈ 7.25 h.

Extended Orbital Architecture

Planet / star radius ratio

0.027840

Semi-major axis / stellar radius

37.800

Impact parameter (b)

0.912

Transit mid-time (BJD)

2,455,035.4554

Angular separation (arcsec)

0.57300

Eq. Temperature

655K

(382 °C)

Insolation (S⊕)

9.30

Earth = 1.00

Earth Similarity (ESI)

0.360

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

Armstrong et al. 2021

Instrument

Kepler CCD Array

Publication

2021-07

Observation locale

Space

Discovery cohort

Planets confirmed in 2020 at Kepler (12 shown).

Kepler-1649 c · Rocky Terrestrial Kepler-1701 b · Sub-Neptune Kepler-1690 b · Sub-Neptune Kepler-1700 b · Sub-Neptune Kepler-1684 b · Sub-Neptune Kepler-1678 b · Sub-Neptune Kepler-598 c · Sub-Neptune Kepler-1661 b · Sub-Neptune Kepler-1663 b · Sub-Neptune Kepler-1681 b · Sub-Neptune Kepler-1672 b · Sub-Neptune Kepler-1702 b · Super-Earth

Host System: Kepler-1667

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,942 K — hotter than the Sun (5,778 K)

Estimated Age

4.70 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

1.088 R☉

Stellar Mass

1.090 M☉

Metallicity [Fe/H]

-0.26

Extended Stellar Properties

Surface gravity (log g)

4.403 dex

Stellar density

1.195 g/cm³

Systemic radial velocity

-2.50 km/s

Rotational v·sin i

4.10 km/s

Metallicity ratio

[M/H]

Distance

626.82 parsec

Light-years 2,044.41 ly

V-band magnitude

13.52 mag

Voyager-speed travel 36,053,129 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.567 mas

Total Proper Motion

22.094 mas/yr

PM Right Ascension

2.01 mas/yr

PM Declination

22.00 mas/yr

Galactic Cartesian (pc)

x = 0.156 · y = -0.649 · z = 0.744

Equatorial (J2000)

RA 283.53295° · Dec 48.09436°

Galactic ℓ, b

77.850° · 19.413°

Ecliptic λ, β

297.535° · 70.243°

HTM-20 index

1473238523