Key parameters at a glance

A radius of 1.81 Earth radii
A mass of 3.95 Earth masses
Surface gravity around 1.20 g
An orbital period of 8.988 days
Semi-major axis 0.0845 AU
Equilibrium temperature 864 K (591 °C)
Distance from Earth 4,706.72 light-years
Earth Similarity Index 0.328
Travel time at Voyager 1 speed 83,003,084 years

Kepler-1884 b Planet Profile

Physical Specs

Radius

1.81 R⊕

Radius (Jupiter)

0.162 R♃

Mass

3.95 M⊕

Mass (Jupiter)

0.012 M♃

Density

3.64 g/cm³

Surface Gravity

1.20 g (Earth)

Classification

Planet Type

Super-Earth

ESI Score 0.328

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

#247of 1176

top 20.9%

This planet

1.81R⊕

Super-Earth median

1.60R⊕

Nearest-size peers

Kepler-356 c 1.81 R⊕ Kepler-135 b 1.81 R⊕ Kepler-1162 c 1.81 R⊕

Metric	Earth	Kepler-1884 b	Jupiter
Radius (R⊕)	1.00	1.81	11.21
Mass (M⊕)	1.00	3.95	317.83
Density (g/cm³)	5.51	3.64	1.33
Surface Gravity (g)	1.00	1.20	2.53
Insolation (S⊕)	1.00	131.92	0.037

Star Catalogue Identifiers

TIC

TIC 272707494

Gaia DR2

Gaia DR2 2078716484251777152

Gaia DR3

Gaia DR3 2078716484251777152

System

Kepler-1884

Percentile among Super-Earth cohort

Radius 1.814 R⊕ · percentile 79 / cohort 1176

Mass 3.950 M⊕ · percentile 72 / cohort 1176

Orbital period 8.99 d · percentile 62 / cohort 1164

Distance 1,443.09 pc · percentile 94 / cohort 1171

ESI 0.328 · percentile 44 / cohort 1176

Orbit & Habitability

Orbital Dynamics

Period

8.988 days

Semi-major axis

0.0845 AU

Eccentricity

0.000

Inclination

81.14 °

Year Length

A year here lasts approximately 8.99 Earth days (2.5% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0845 AU.

Transit Fingerprint

Depth

0.016 %

Duration

4.650 h

Impact parameter b

0.121

Rp / R★

0.011862

Transit midpoint (BJD)

2,454,971.8373

Photometric dip

Transit produces a flux drop of 161 ppm lasting ≈ 4.65 h.

Extended Orbital Architecture

Planet / star radius ratio

0.011862

Semi-major axis / stellar radius

14.850

Impact parameter (b)

0.121

Transit mid-time (BJD)

2,454,971.8373

Angular separation (arcsec)

0.05860

Eq. Temperature

864K

(591 °C)

Insolation (S⊕)

131.92

Earth = 1.00

Earth Similarity (ESI)

0.328

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

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-1884

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,984 K — hotter than the Sun (5,778 K)

Estimated Age

0.30 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.906 R☉

Stellar Mass

0.993 M☉

Metallicity [Fe/H]

-0.20

Extended Stellar Properties

Surface gravity (log g)

4.521 dex

Stellar density

0.050 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,443.09 parsec

Light-years 4,706.72 ly

V-band magnitude

15.43 mag

Voyager-speed travel 83,003,084 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.665 mas

Total Proper Motion

5.845 mas/yr

PM Right Ascension

-5.80 mas/yr

PM Declination

-0.74 mas/yr

Galactic Cartesian (pc)

x = 0.329 · y = -0.653 · z = 0.683

Equatorial (J2000)

RA 296.74640° · Dec 43.04542°

Galactic ℓ, b

77.030° · 8.925°

Ecliptic λ, β

315.140° · 62.356°

HTM-20 index

1572121064