Key parameters at a glance

A radius of 14.10 Earth radii
A mass of 209.80 Earth masses
Surface gravity around 1.06 g
An orbital period of 21.512 days
Semi-major axis 0.1467 AU
Equilibrium temperature 597 K (324 °C)
Distance from Earth 824.09 light-years
Earth Similarity Index 0.208
Travel time at Voyager 1 speed 14,532,801 years

1 sibling around KOI-984

KOI-984 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
KOI-984 b	Neptune-like	4.30	17.10	4.288	1,022	2022
KOI-984 c this	Gas Giant	14.10	209.80	21.512	597	2022

KOI-984 c Planet Profile

Physical Specs

Radius

14.10 R⊕

Radius (Jupiter)

1.250 R♃

Mass

209.80 M⊕

Mass (Jupiter)

0.660 M♃

Density

0.41 g/cm³

Surface Gravity

1.06 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.208

HZ Position Unknown

Controversial No

Discovery

Year 2022

Method Transit Timing Variations

Facility Kepler

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#371of 1771

top 20.9%

This planet

14.10R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HD 27894 b 14.10 R⊕ HD 103720 b 14.10 R⊕ HD 216770 b 14.10 R⊕

Metric	Earth	KOI-984 c	Jupiter
Radius (R⊕)	1.00	14.10	11.21
Mass (M⊕)	1.00	209.80	317.83
Density (g/cm³)	5.51	0.41	1.33
Surface Gravity (g)	1.00	1.06	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	209.800 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

TIC

TIC 122784501

System

KOI-984

Percentile among Gas Giant cohort

Radius 14.100 R⊕ · percentile 77 / cohort 1771

Mass 209.800 M⊕ · percentile 22 / cohort 1747

Orbital period 21.51 d · percentile 48 / cohort 1533

Distance 252.67 pc · percentile 56 / cohort 1759

ESI 0.208 · percentile 40 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

21.512 days

Semi-major axis

0.1467 AU

Eccentricity

0.380

Inclination

— °

Year Length

A year here lasts approximately 21.51 Earth days (5.9% of a terrestrial year) on a highly eccentric trajectory at a mean orbital distance of 0.1467 AU.

Eq. Temperature

597K

(324 °C)

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.208

0 = alien, 1 = Earth-identical

Insufficient insolation data — the surface is too hot to retain surface water.

Discovery Paper

Primary reference

Sun et al. 2022

Instrument

Kepler CCD Array

Publication

2022-05

Observation locale

Space

Discovery cohort

Planets confirmed in 2022 at Kepler (6 shown).

KOI-7913 b · Sub-Neptune KOI-7368 b · Sub-Neptune Kepler-1972 b · Rocky Terrestrial Kepler-1972 c · Rocky Terrestrial KOI-984 b · Neptune-like KOI-4777.01 · Rocky Terrestrial

Host System: KOI-984

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,295 K — cooler than the Sun (5,778 K)

Estimated Age

1.30 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.818 R☉

Stellar Mass

0.928 M☉

Metallicity [Fe/H]

0.12

Extended Stellar Properties

Surface gravity (log g)

4.540 dex

Stellar density

2.397 g/cm³

Metallicity ratio

[Fe/H]

Distance

252.67 parsec

Light-years 824.09 ly

V-band magnitude

12.80 mag

Voyager-speed travel 14,532,801 yr

Multi-band Host Photometry — 15 bands

Astrometric Data

Total Proper Motion

58.414 mas/yr

PM Right Ascension

36.30 mas/yr

PM Declination

45.76 mas/yr

Galactic Cartesian (pc)

x = 0.287 · y = -0.747 · z = 0.600

Equatorial (J2000)

RA 291.04894° · Dec 36.84008°

Galactic ℓ, b

69.406° · 9.901°

Ecliptic λ, β

302.752° · 57.910°

HTM-20 index

-1722620655