Key parameters at a glance

A radius of 1.23 Earth radii
A mass of 2.04 Earth masses
Surface gravity around 1.35 g
An orbital period of 5.699 days
Semi-major axis 0.0612 AU
Equilibrium temperature 964 K (691 °C)
Distance from Earth 1,554.89 light-years
Earth Similarity Index 0.322
Travel time at Voyager 1 speed 27,420,542 years

Kepler-884 b Planet Profile

Physical Specs

Radius

1.23 R⊕

Radius (Jupiter)

0.110 R♃

Mass

2.04 M⊕

Mass (Jupiter)

0.006 M♃

Density

6.02 g/cm³

Surface Gravity

1.35 g (Earth)

Classification

Planet Type

Rocky Terrestrial

ESI Score 0.322

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

#17of 570

top 2.8%

This planet

1.23R⊕

Rocky Terrestrial median

1.01R⊕

Nearest-size peers

Kepler-252 b 1.23 R⊕ Kepler-271 b 1.23 R⊕ Kepler-197 c 1.23 R⊕

Metric	Earth	Kepler-884 b	Jupiter
Radius (R⊕)	1.00	1.23	11.21
Mass (M⊕)	1.00	2.04	317.83
Density (g/cm³)	5.51	6.02	1.33
Surface Gravity (g)	1.00	1.35	2.53
Insolation (S⊕)	1.00	139.50	0.037

Star Catalogue Identifiers

TIC

TIC 26657091

Gaia DR2

Gaia DR2 2129894833510904448

Gaia DR3

Gaia DR3 2129894833511828864

System

Kepler-884

Percentile among Rocky Terrestrial cohort

Radius 1.230 R⊕ · percentile 94 / cohort 570

Mass 2.040 M⊕ · percentile 86 / cohort 570

Orbital period 5.70 d · percentile 59 / cohort 567

Distance 476.73 pc · percentile 61 / cohort 566

ESI 0.322 · percentile 44 / cohort 570

Orbit & Habitability

Orbital Dynamics

Period

5.699 days

Semi-major axis

0.0612 AU

Eccentricity

0.000

Inclination

89.98 °

Year Length

A year here lasts approximately 5.70 Earth days (1.6% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0612 AU.

Transit Fingerprint

Depth

0.016 %

Duration

2.388 h

Impact parameter b

0.760

Rp / R★

0.011651

Transit midpoint (BJD)

2,454,969.5875

Photometric dip

Transit produces a flux drop of 161 ppm lasting ≈ 2.39 h.

Extended Orbital Architecture

Planet / star radius ratio

0.011651

Semi-major axis / stellar radius

18.429

Impact parameter (b)

0.760

Transit mid-time (BJD)

2,454,969.5875

Angular separation (arcsec)

0.12800

Eq. Temperature

964K

(691 °C)

Insolation (S⊕)

139.50

Earth = 1.00

Earth Similarity (ESI)

0.322

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-884

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,715 K — cooler than the Sun (5,778 K)

Estimated Age

2.45 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.940 R☉

Stellar Mass

1.000 M☉

Metallicity [Fe/H]

0.05

Extended Stellar Properties

Surface gravity (log g)

4.490 dex

Stellar density

1.390 g/cm³

Systemic radial velocity

-33.13 km/s

Metallicity ratio

[Fe/H]

Distance

476.73 parsec

Light-years 1,554.89 ly

V-band magnitude

13.16 mag

Voyager-speed travel 27,420,542 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

3.089 mas

Total Proper Motion

12.478 mas/yr

PM Right Ascension

1.81 mas/yr

PM Declination

12.35 mas/yr

Galactic Cartesian (pc)

x = 0.247 · y = -0.594 · z = 0.765

Equatorial (J2000)

RA 292.58443° · Dec 49.92320°

Galactic ℓ, b

81.956° · 14.603°

Ecliptic λ, β

315.728° · 69.801°

HTM-20 index

649050863