Key parameters at a glance

A radius of 2.98 Earth radii
A mass of 9.17 Earth masses
Surface gravity around 1.03 g
An orbital period of 116.332 days
Semi-major axis 0.4466 AU
Equilibrium temperature 323 K (50 °C)
Distance from Earth 2,215.78 light-years
Earth Similarity Index 0.660
Travel time at Voyager 1 speed 39,075,219 years

Kepler-985 b Planet Profile

Physical Specs

Radius

2.98 R⊕

Radius (Jupiter)

0.266 R♃

Mass

9.17 M⊕

Mass (Jupiter)

0.029 M♃

Density

1.90 g/cm³

Surface Gravity

1.03 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.660

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

#542of 1978

top 27.4%

This planet

2.98R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

K2-278 b 2.98 R⊕ Kepler-1299 b 2.98 R⊕ Kepler-1881 b 2.98 R⊕

Metric	Earth	Kepler-985 b	Jupiter
Radius (R⊕)	1.00	2.98	11.21
Mass (M⊕)	1.00	9.17	317.83
Density (g/cm³)	5.51	1.90	1.33
Surface Gravity (g)	1.00	1.03	2.53
Insolation (S⊕)	1.00	2.40	0.037

Star Catalogue Identifiers

TIC

TIC 159305424

Gaia DR2

Gaia DR2 2126878048483137152

Gaia DR3

Gaia DR3 2126878048483137152

System

Kepler-985

Percentile among Sub-Neptune cohort

Radius 2.980 R⊕ · percentile 72 / cohort 1978

Mass 9.170 M⊕ · percentile 66 / cohort 1978

Orbital period 116.33 d · percentile 95 / cohort 1946

Distance 679.36 pc · percentile 58 / cohort 1975

ESI 0.660 · percentile 89 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

116.332 days

Semi-major axis

0.4466 AU

Eccentricity

0.000

Inclination

89.99 °

Year Length

A year here lasts approximately 116.33 Earth days (31.8% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.4466 AU.

Transit Fingerprint

Depth

0.159 %

Duration

6.865 h

Impact parameter b

0.032

Rp / R★

0.032444

Transit midpoint (BJD)

2,455,006.6869

Photometric dip

Transit produces a flux drop of 1,586 ppm lasting ≈ 6.87 h.

Extended Orbital Architecture

Planet / star radius ratio

0.032444

Semi-major axis / stellar radius

130.950

Impact parameter (b)

0.032

Transit mid-time (BJD)

2,455,006.6869

Angular separation (arcsec)

0.65700

Eq. Temperature

323K

(50 °C)

Insolation (S⊕)

2.40

Earth = 1.00

Earth Similarity (ESI)

0.660

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — liquid water is physically possible with adequate atmospheric pressure.

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-985

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,434 K — cooler than the Sun (5,778 K)

Estimated Age

3.39 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.850 R☉

Stellar Mass

0.910 M☉

Metallicity [Fe/H]

0.00

Extended Stellar Properties

Surface gravity (log g)

4.540 dex

Stellar density

1.690 g/cm³

Metallicity ratio

[Fe/H]

Distance

679.36 parsec

Light-years 2,215.78 ly

V-band magnitude

14.90 mag

Voyager-speed travel 39,075,219 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.443 mas

Total Proper Motion

8.713 mas/yr

PM Right Ascension

-0.25 mas/yr

PM Declination

-8.71 mas/yr

Galactic Cartesian (pc)

x = 0.248 · y = -0.675 · z = 0.695

Equatorial (J2000)

RA 290.14434° · Dec 44.04988°

Galactic ℓ, b

75.739° · 13.646°

Ecliptic λ, β

305.850° · 65.001°

HTM-20 index

880917071