Key parameters at a glance

A radius of 1.12 Earth radii
A mass of 1.46 Earth masses
Surface gravity around 1.16 g
An orbital period of 6.187 days
Semi-major axis 0.0640 AU
Equilibrium temperature 851 K (578 °C)
Distance from Earth 2,688.54 light-years
Earth Similarity Index 0.377
Travel time at Voyager 1 speed 47,412,339 years

1 sibling around Kepler-285

Kepler-285 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-285 b	Super-Earth	1.34	2.36	2.634	1,131	2014
Kepler-285 c this	Rocky Terrestrial	1.12	1.46	6.187	851	2014

Kepler-285 c Planet Profile

Physical Specs

Radius

1.12 R⊕

Radius (Jupiter)

0.100 R♃

Mass

1.46 M⊕

Mass (Jupiter)

0.005 M♃

Density

5.71 g/cm³

Surface Gravity

1.16 g (Earth)

Classification

Planet Type

Rocky Terrestrial

ESI Score 0.377

HZ Position Inner

Controversial No

Discovery

Year 2014

Method Transit

Facility Kepler

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#193of 570

top 33.7%

This planet

1.12R⊕

Rocky Terrestrial median

1.01R⊕

Nearest-size peers

Kepler-381 c 1.12 R⊕ Kepler-1082 b 1.12 R⊕ Kepler-1288 b 1.12 R⊕

Metric	Earth	Kepler-285 c	Jupiter
Radius (R⊕)	1.00	1.12	11.21
Mass (M⊕)	1.00	1.46	317.83
Density (g/cm³)	5.51	5.71	1.33
Surface Gravity (g)	1.00	1.16	2.53
Insolation (S⊕)	1.00	137.07	0.037

Star Catalogue Identifiers

TIC

TIC 26416742

Gaia DR2

Gaia DR2 2129295427874937856

Gaia DR3

Gaia DR3 2129295427874937856

System

Kepler-285

Percentile among Rocky Terrestrial cohort

Radius 1.120 R⊕ · percentile 64 / cohort 570

Mass 1.460 M⊕ · percentile 59 / cohort 570

Orbital period 6.19 d · percentile 62 / cohort 567

Distance 824.31 pc · percentile 87 / cohort 566

ESI 0.377 · percentile 55 / cohort 570

Orbit & Habitability

Orbital Dynamics

Period

6.187 days

Semi-major axis

0.0640 AU

Eccentricity

0.000

Inclination

89.95 °

Year Length

A year here lasts approximately 6.19 Earth days (1.7% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0640 AU.

Transit Fingerprint

Depth

0.020 %

Duration

2.908 h

Impact parameter b

0.080

Rp / R★

0.012650

Transit midpoint (BJD)

2,454,969.6335

Photometric dip

Transit produces a flux drop of 203 ppm lasting ≈ 2.91 h.

Extended Orbital Architecture

Planet / star radius ratio

0.012650

Semi-major axis / stellar radius

16.460

Impact parameter (b)

0.080

Transit mid-time (BJD)

2,454,969.6335

Angular separation (arcsec)

0.07760

Eq. Temperature

851K

(578 °C)

Insolation (S⊕)

137.07

Earth = 1.00

Earth Similarity (ESI)

0.377

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

Rowe et al. 2014

Instrument

Kepler CCD Array

Publication

2014-03

Observation locale

Space

Discovery cohort

Planets confirmed in 2014 at Kepler (12 shown).

Kepler-186 e · Super-Earth Kepler-395 c · Super-Earth Kepler-220 e · Super-Earth Kepler-249 d · Super-Earth Kepler-296 f · Super-Earth Kepler-367 c · Rocky Terrestrial Kepler-296 e · Super-Earth Kepler-155 c · Sub-Neptune Kepler-138 d · Super-Earth Kepler-333 c · Rocky Terrestrial Kepler-331 d · Super-Earth Kepler-267 d · Sub-Neptune

Host System: Kepler-285

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,411 K — cooler than the Sun (5,778 K)

Estimated Age

2.88 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.808 R☉

Stellar Mass

0.915 M☉

Metallicity [Fe/H]

0.17

Extended Stellar Properties

Surface gravity (log g)

4.584 dex

Stellar density

1.500 g/cm³

Metallicity ratio

[Fe/H]

Distance

824.31 parsec

Light-years 2,688.54 ly

V-band magnitude

15.20 mag

Voyager-speed travel 47,412,339 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.185 mas

Total Proper Motion

13.951 mas/yr

PM Right Ascension

-7.69 mas/yr

PM Declination

-11.64 mas/yr

Galactic Cartesian (pc)

x = 0.244 · y = -0.622 · z = 0.744

Equatorial (J2000)

RA 291.39085° · Dec 48.06554°

Galactic ℓ, b

79.874° · 14.535°

Ecliptic λ, β

311.549° · 68.441°

HTM-20 index

-207424423