Key parameters at a glance

A radius of 1.13 Earth radii
A mass of 1.51 Earth masses
Surface gravity around 1.18 g
An orbital period of 7.638 days
Semi-major axis 0.0801 AU
Equilibrium temperature 1,089 K (816 °C)
Distance from Earth 2,891.66 light-years
Earth Similarity Index 0.288
Travel time at Voyager 1 speed 50,994,421 years

1 sibling around Kepler-887

Kepler-887 c shares its host star with 1 other confirmed planet. Side-by-side measurements below.

Planet	Type	Radius (R⊕)	Mass (M⊕)	Period (d)	Eq. T (K)	Year
Kepler-887 c this	Rocky Terrestrial	1.13	1.51	7.638	1,089	2016
Kepler-887 b	Super-Earth	1.84	4.04	20.422	785	2016

Kepler-887 c Planet Profile

Physical Specs

Radius

1.13 R⊕

Radius (Jupiter)

0.101 R♃

Mass

1.51 M⊕

Mass (Jupiter)

0.005 M♃

Density

5.75 g/cm³

Surface Gravity

1.18 g (Earth)

Classification

Planet Type

Rocky Terrestrial

ESI Score 0.288

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

#180of 570

top 31.4%

This planet

1.13R⊕

Rocky Terrestrial median

1.01R⊕

Nearest-size peers

TOI-1450 A c 1.13 R⊕ Kepler-250 b 1.13 R⊕ G 268-110 b 1.13 R⊕

Metric	Earth	Kepler-887 c	Jupiter
Radius (R⊕)	1.00	1.13	11.21
Mass (M⊕)	1.00	1.51	317.83
Density (g/cm³)	5.51	5.75	1.33
Surface Gravity (g)	1.00	1.18	2.53
Insolation (S⊕)	1.00	407.98	0.037

Star Catalogue Identifiers

TIC

TIC 122293639

Gaia DR2

Gaia DR2 2101093092063293824

Gaia DR3

Gaia DR3 2101093092063293824

System

Kepler-887

Percentile among Rocky Terrestrial cohort

Radius 1.130 R⊕ · percentile 66 / cohort 570

Mass 1.510 M⊕ · percentile 62 / cohort 570

Orbital period 7.64 d · percentile 71 / cohort 567

Distance 886.59 pc · percentile 90 / cohort 566

ESI 0.288 · percentile 35 / cohort 570

Orbit & Habitability

Orbital Dynamics

Period

7.638 days

Semi-major axis

0.0801 AU

Eccentricity

0.000

Inclination

88.30 °

Year Length

A year here lasts approximately 7.64 Earth days (2.1% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0801 AU.

Transit Fingerprint

Depth

0.007 %

Duration

3.971 h

Impact parameter b

0.728

Rp / R★

0.008187

Transit midpoint (BJD)

2,454,971.2447

Photometric dip

Transit produces a flux drop of 72 ppm lasting ≈ 3.97 h.

Extended Orbital Architecture

Planet / star radius ratio

0.008187

Semi-major axis / stellar radius

14.540

Impact parameter (b)

0.728

Transit mid-time (BJD)

2,454,971.2447

Angular separation (arcsec)

0.09030

Eq. Temperature

1,089K

(816 °C)

Insolation (S⊕)

407.98

Earth = 1.00

Earth Similarity (ESI)

0.288

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched.

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-887

Spectral Class

F-type yellow-white

Effective Temperature

6,194 K — hotter than the Sun (5,778 K)

Estimated Age

3.09 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.290 R☉

Stellar Mass

1.190 M☉

Metallicity [Fe/H]

0.08

Extended Stellar Properties

Surface gravity (log g)

4.290 dex

Stellar density

0.470 g/cm³

Systemic radial velocity

-5.41 km/s

Metallicity ratio

[Fe/H]

Distance

886.59 parsec

Light-years 2,891.66 ly

V-band magnitude

13.52 mag

Voyager-speed travel 50,994,421 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.099 mas

Total Proper Motion

12.935 mas/yr

PM Right Ascension

-6.34 mas/yr

PM Declination

-11.27 mas/yr

Galactic Cartesian (pc)

x = 0.264 · y = -0.721 · z = 0.640

Equatorial (J2000)

RA 290.09079° · Dec 39.81691°

Galactic ℓ, b

71.792° · 11.884°

Ecliptic λ, β

302.943° · 60.978°

HTM-20 index

-841338039