Key parameters at a glance

A radius of 0.97 Earth radii
A mass of 0.87 Earth masses
Surface gravity around 0.93 g
An orbital period of 14.797 days
Semi-major axis 0.1276 AU
Equilibrium temperature 874 K (601 °C)
Distance from Earth 1,377.26 light-years
Earth Similarity Index 0.371
Travel time at Voyager 1 speed 24,287,903 years

Kepler-1285 b Planet Profile

Physical Specs

Radius

0.97 R⊕

Radius (Jupiter)

0.087 R♃

Mass

0.87 M⊕

Mass (Jupiter)

0.003 M♃

Density

5.24 g/cm³

Surface Gravity

0.93 g (Earth)

Classification

Planet Type

Rocky Terrestrial

ESI Score 0.371

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

#362of 570

top 63.3%

This planet

0.97R⊕

Rocky Terrestrial median

1.01R⊕

Nearest-size peers

Kepler-1297 b 0.97 R⊕ Kepler-1443 b 0.97 R⊕ Kepler-1293 b 0.97 R⊕

Metric	Earth	Kepler-1285 b	Jupiter
Radius (R⊕)	1.00	0.97	11.21
Mass (M⊕)	1.00	0.87	317.83
Density (g/cm³)	5.51	5.24	1.33
Surface Gravity (g)	1.00	0.93	2.53
Insolation (S⊕)	1.00	181.59	0.037

Star Catalogue Identifiers

TIC

TIC 123410927

Gaia DR2

Gaia DR2 2105291955168605440

Gaia DR3

Gaia DR3 2105291955168605440

System

Kepler-1285

Percentile among Rocky Terrestrial cohort

Radius 0.970 R⊕ · percentile 36 / cohort 570

Mass 0.871 M⊕ · percentile 32 / cohort 570

Orbital period 14.80 d · percentile 87 / cohort 567

Distance 422.27 pc · percentile 56 / cohort 566

ESI 0.371 · percentile 54 / cohort 570

Orbit & Habitability

Orbital Dynamics

Period

14.797 days

Semi-major axis

0.1276 AU

Eccentricity

0.000

Inclination

89.48 °

Year Length

A year here lasts approximately 14.80 Earth days (4.1% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1276 AU.

Transit Fingerprint

Depth

0.006 %

Duration

5.638 h

Impact parameter b

0.320

Rp / R★

0.007466

Transit midpoint (BJD)

2,454,975.7377

Photometric dip

Transit produces a flux drop of 56 ppm lasting ≈ 5.64 h.

Extended Orbital Architecture

Planet / star radius ratio

0.007466

Semi-major axis / stellar radius

19.950

Impact parameter (b)

0.320

Transit mid-time (BJD)

2,454,975.7377

Angular separation (arcsec)

0.30200

Eq. Temperature

874K

(601 °C)

Insolation (S⊕)

181.59

Earth = 1.00

Earth Similarity (ESI)

0.371

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-1285

Spectral Class

F-type yellow-white

Effective Temperature

6,170 K — hotter than the Sun (5,778 K)

Estimated Age

2.75 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.280 R☉

Stellar Mass

1.200 M☉

Metallicity [Fe/H]

0.16

Extended Stellar Properties

Surface gravity (log g)

4.300 dex

Stellar density

0.400 g/cm³

Systemic radial velocity

-3.72 km/s

Metallicity ratio

[Fe/H]

Distance

422.27 parsec

Light-years 1,377.26 ly

V-band magnitude

11.72 mag

Voyager-speed travel 24,287,903 yr

Multi-band Host Photometry — 14 bands

Astrometric Data

Parallax

2.339 mas

Total Proper Motion

9.649 mas/yr

PM Right Ascension

-1.04 mas/yr

PM Declination

-9.59 mas/yr

Galactic Cartesian (pc)

x = 0.147 · y = -0.702 · z = 0.697

Equatorial (J2000)

RA 281.83534° · Dec 44.15588°

Galactic ℓ, b

73.500° · 19.212°

Ecliptic λ, β

291.836° · 66.700°

HTM-20 index

-43929068