Key parameters at a glance

A radius of 2.72 Earth radii
A mass of 7.85 Earth masses
Surface gravity around 1.06 g
An orbital period of 8.088 days
Semi-major axis 0.0753 AU
Equilibrium temperature 792 K (519 °C)
Distance from Earth 1,880.30 light-years
Earth Similarity Index 0.309
Travel time at Voyager 1 speed 33,159,073 years

Kepler-979 b Planet Profile

Physical Specs

Radius

2.72 R⊕

Radius (Jupiter)

0.243 R♃

Mass

7.85 M⊕

Mass (Jupiter)

0.025 M♃

Density

2.14 g/cm³

Surface Gravity

1.06 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.309

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

#838of 1978

top 42.3%

This planet

2.72R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-26 c 2.72 R⊕ Kepler-351 d 2.72 R⊕ Kepler-358 b 2.72 R⊕

Metric	Earth	Kepler-979 b	Jupiter
Radius (R⊕)	1.00	2.72	11.21
Mass (M⊕)	1.00	7.85	317.83
Density (g/cm³)	5.51	2.14	1.33
Surface Gravity (g)	1.00	1.06	2.53
Insolation (S⊕)	1.00	77.84	0.037

Star Catalogue Identifiers

TIC

TIC 239285770

Gaia DR2

Gaia DR2 2085337502756644224

Gaia DR3

Gaia DR3 2085337502756644224

System

Kepler-979

Percentile among Sub-Neptune cohort

Radius 2.720 R⊕ · percentile 57 / cohort 1978

Mass 7.850 M⊕ · percentile 53 / cohort 1978

Orbital period 8.09 d · percentile 26 / cohort 1946

Distance 576.50 pc · percentile 51 / cohort 1975

ESI 0.309 · percentile 30 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

8.088 days

Semi-major axis

0.0753 AU

Eccentricity

0.000

Inclination

88.23 °

Year Length

A year here lasts approximately 8.09 Earth days (2.2% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0753 AU.

Transit Fingerprint

Depth

0.095 %

Duration

1.777 h

Impact parameter b

0.593

Rp / R★

0.030337

Transit midpoint (BJD)

2,454,971.7362

Photometric dip

Transit produces a flux drop of 953 ppm lasting ≈ 1.78 h.

Extended Orbital Architecture

Planet / star radius ratio

0.030337

Semi-major axis / stellar radius

24.100

Impact parameter (b)

0.593

Transit mid-time (BJD)

2,454,971.7362

Angular separation (arcsec)

0.13100

Eq. Temperature

792K

(519 °C)

Insolation (S⊕)

77.84

Earth = 1.00

Earth Similarity (ESI)

0.309

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-979

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,310 K — cooler than the Sun (5,778 K)

Estimated Age

4.57 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.830 R☉

Stellar Mass

0.870 M☉

Metallicity [Fe/H]

-0.02

Extended Stellar Properties

Surface gravity (log g)

4.540 dex

Stellar density

7.278 g/cm³

Metallicity ratio

[Fe/H]

Distance

576.50 parsec

Light-years 1,880.30 ly

V-band magnitude

14.88 mag

Voyager-speed travel 33,159,073 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.706 mas

Total Proper Motion

14.974 mas/yr

PM Right Ascension

-8.99 mas/yr

PM Declination

-11.97 mas/yr

Galactic Cartesian (pc)

x = 0.349 · y = -0.595 · z = 0.724

Equatorial (J2000)

RA 300.37120° · Dec 46.40819°

Galactic ℓ, b

81.277° · 8.372°

Ecliptic λ, β

323.524° · 64.308°

HTM-20 index

-1271542174