Key parameters at a glance

A radius of 2.16 Earth radii
A mass of 5.31 Earth masses
Surface gravity around 1.14 g
An orbital period of 92.264 days
Semi-major axis 0.4204 AU
Equilibrium temperature 469 K (196 °C)
Distance from Earth 5,321.76 light-years
Earth Similarity Index 0.555
Travel time at Voyager 1 speed 93,849,179 years

Kepler-1621 b Planet Profile

Physical Specs

Radius

2.16 R⊕

Radius (Jupiter)

0.193 R♃

Mass

5.31 M⊕

Mass (Jupiter)

0.017 M♃

Density

2.90 g/cm³

Surface Gravity

1.14 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.555

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

#1731of 1978

top 87.5%

This planet

2.16R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-291 b 2.16 R⊕ Kepler-142 d 2.16 R⊕ Kepler-308 c 2.16 R⊕

Metric	Earth	Kepler-1621 b	Jupiter
Radius (R⊕)	1.00	2.16	11.21
Mass (M⊕)	1.00	5.31	317.83
Density (g/cm³)	5.51	2.90	1.33
Surface Gravity (g)	1.00	1.14	2.53
Insolation (S⊕)	1.00	14.06	0.037

Star Catalogue Identifiers

TIC

TIC 273238089

Gaia DR2

Gaia DR2 2078849112841866624

Gaia DR3

Gaia DR3 2078849112841866624

System

Kepler-1621

Percentile among Sub-Neptune cohort

Radius 2.160 R⊕ · percentile 12 / cohort 1978

Mass 5.310 M⊕ · percentile 13 / cohort 1978

Orbital period 92.26 d · percentile 93 / cohort 1946

Distance 1,631.66 pc · percentile 94 / cohort 1975

ESI 0.555 · percentile 77 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

92.264 days

Semi-major axis

0.4204 AU

Eccentricity

0.000

Inclination

89.81 °

Year Length

A year here lasts approximately 92.26 Earth days (25.3% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.4204 AU.

Transit Fingerprint

Depth

0.029 %

Duration

9.862 h

Impact parameter b

0.273

Rp / R★

0.015778

Transit midpoint (BJD)

2,454,979.4240

Photometric dip

Transit produces a flux drop of 294 ppm lasting ≈ 9.86 h.

Extended Orbital Architecture

Planet / star radius ratio

0.015778

Semi-major axis / stellar radius

80.160

Impact parameter (b)

0.273

Transit mid-time (BJD)

2,454,979.4240

Angular separation (arcsec)

0.25800

Eq. Temperature

469K

(196 °C)

Insolation (S⊕)

14.06

Earth = 1.00

Earth Similarity (ESI)

0.555

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-1621

Spectral Class

F-type yellow-white

Effective Temperature

6,158 K — hotter than the Sun (5,778 K)

Estimated Age

2.69 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.240 R☉

Stellar Mass

1.150 M☉

Metallicity [Fe/H]

0.03

Extended Stellar Properties

Surface gravity (log g)

4.310 dex

Stellar density

0.818 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,631.66 parsec

Light-years 5,321.76 ly

V-band magnitude

15.15 mag

Voyager-speed travel 93,849,179 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.585 mas

Total Proper Motion

8.839 mas/yr

PM Right Ascension

-1.34 mas/yr

PM Declination

-8.74 mas/yr

Galactic Cartesian (pc)

x = 0.334 · y = -0.639 · z = 0.693

Equatorial (J2000)

RA 297.58853° · Dec 43.84119°

Galactic ℓ, b

78.035° · 8.780°

Ecliptic λ, β

317.043° · 62.846°

HTM-20 index

2067398842