Key parameters at a glance

A radius of 2.50 Earth radii
A mass of 6.80 Earth masses
Surface gravity around 1.09 g
An orbital period of 18.115 days
Semi-major axis 0.1440 AU
Equilibrium temperature 830 K (557 °C)
Distance from Earth 2,124.31 light-years
Earth Similarity Index 0.305
Travel time at Voyager 1 speed 37,462,253 years

Kepler-885 b Planet Profile

Physical Specs

Radius

2.50 R⊕

Radius (Jupiter)

0.223 R♃

Mass

6.80 M⊕

Mass (Jupiter)

0.021 M♃

Density

2.39 g/cm³

Surface Gravity

1.09 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.305

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

#1168of 1978

top 59.0%

This planet

2.50R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-126 d 2.50 R⊕ Kepler-254 d 2.50 R⊕ GJ 163 c 2.50 R⊕

Metric	Earth	Kepler-885 b	Jupiter
Radius (R⊕)	1.00	2.50	11.21
Mass (M⊕)	1.00	6.80	317.83
Density (g/cm³)	5.51	2.39	1.33
Surface Gravity (g)	1.00	1.09	2.53
Insolation (S⊕)	1.00	124.65	0.037

Star Catalogue Identifiers

TIC

TIC 299030528

Gaia DR2

Gaia DR2 2132686356093801472

Gaia DR3

Gaia DR3 2132686356093801472

System

Kepler-885

Percentile among Sub-Neptune cohort

Radius 2.500 R⊕ · percentile 40 / cohort 1978

Mass 6.800 M⊕ · percentile 37 / cohort 1978

Orbital period 18.11 d · percentile 58 / cohort 1946

Distance 651.32 pc · percentile 56 / cohort 1975

ESI 0.305 · percentile 29 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

18.115 days

Semi-major axis

0.1440 AU

Eccentricity

0.000

Inclination

85.95 °

Year Length

A year here lasts approximately 18.11 Earth days (5.0% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1440 AU.

Transit Fingerprint

Depth

0.024 %

Duration

5.227 h

Impact parameter b

0.740

Rp / R★

0.016641

Transit midpoint (BJD)

2,454,980.4922

Photometric dip

Transit produces a flux drop of 242 ppm lasting ≈ 5.23 h.

Extended Orbital Architecture

Planet / star radius ratio

0.016641

Semi-major axis / stellar radius

19.000

Impact parameter (b)

0.740

Transit mid-time (BJD)

2,454,980.4922

Angular separation (arcsec)

0.22100

Eq. Temperature

830K

(557 °C)

Insolation (S⊕)

124.65

Earth = 1.00

Earth Similarity (ESI)

0.305

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-885

Spectral Class

F-type yellow-white

Effective Temperature

6,187 K — hotter than the Sun (5,778 K)

Estimated Age

3.16 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.350 R☉

Stellar Mass

1.210 M☉

Metallicity [Fe/H]

0.11

Extended Stellar Properties

Surface gravity (log g)

4.260 dex

Stellar density

0.450 g/cm³

Systemic radial velocity

-25.05 km/s

Metallicity ratio

[Fe/H]

Distance

651.32 parsec

Light-years 2,124.31 ly

V-band magnitude

12.95 mag

Voyager-speed travel 37,462,253 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.507 mas

Total Proper Motion

11.774 mas/yr

PM Right Ascension

-1.55 mas/yr

PM Declination

-11.67 mas/yr

Galactic Cartesian (pc)

x = 0.207 · y = -0.612 · z = 0.763

Equatorial (J2000)

RA 288.66157° · Dec 49.73715°

Galactic ℓ, b

80.725° · 16.846°

Ecliptic λ, β

308.683° · 70.680°

HTM-20 index

663321672