Key parameters at a glance

A radius of 12.90 Earth radii
A mass of 1,586.60 Earth masses
Surface gravity around 9.53 g
An orbital period of 239.504 days
Semi-major axis 0.8000 AU
Distance from Earth 3,876.49 light-years
Earth Similarity Index 0.429
Travel time at Voyager 1 speed 68,361,977 years

brightness_6

Circumbinary planet

Kepler-1660 AB b orbits a binary-star pair rather than a single host — a minority architecture in the confirmed catalogue.

Kepler-1660 AB b Planet Profile

Physical Specs

Radius

12.90 R⊕

Radius (Jupiter)

1.150 R♃

Mass

1,586.60 M⊕

Mass (Jupiter)

4.992 M♃

Density

4.06 g/cm³

Surface Gravity

9.53 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.429

HZ Position Unknown

Controversial No

Discovery

Year 2023

Method Eclipse Timing Variations

Facility Kepler

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#1011of 1771

top 57.0%

This planet

12.90R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HD 55696 b 12.90 R⊕ HD 24040 b 12.90 R⊕ BD-210397 c 12.90 R⊕

Metric	Earth	Kepler-1660 AB b	Jupiter
Radius (R⊕)	1.00	12.90	11.21
Mass (M⊕)	1.00	1,586.60	317.83
Density (g/cm³)	5.51	4.06	1.33
Surface Gravity (g)	1.00	9.53	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	1,586.599 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

TIC

TIC 122446960

Gaia DR2

Gaia DR2 2101127864119148160

Gaia DR3

Gaia DR3 2101127864119148160

System

Kepler-1660

Percentile among Gas Giant cohort

Radius 12.900 R⊕ · percentile 41 / cohort 1771

Mass 1,586.599 M⊕ · percentile 75 / cohort 1747

Orbital period 239.50 d · percentile 59 / cohort 1533

Distance 1,188.54 pc · percentile 88 / cohort 1759

ESI 0.429 · percentile 94 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

239.504 days

Semi-major axis

0.8000 AU

Eccentricity

0.055

Inclination

86.31 °

Year Length

A year here lasts approximately 239.50 Earth days (65.6% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.8000 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.429

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Goldberg et al. 2023

Instrument

Kepler CCD Array

Publication

2023-11

Observation locale

Space

Discovery cohort

Planets confirmed in 2023 at Kepler (12 shown).

Kepler-1126 c · Super-Earth Kepler-2000 c · Super-Earth Kepler-1052 c · Sub-Neptune Kepler-311 d · Sub-Neptune Kepler-1996 c · Sub-Neptune Kepler-1162 c · Super-Earth Kepler-1996 b · Sub-Neptune Kepler-1610 c · Sub-Neptune Kepler-1801 c · Sub-Neptune Kepler-1995 b · Neptune-like Kepler-1992 b · Rocky Terrestrial Kepler-1986 b · Super-Earth

Host System: Kepler-1660 A

Spectral Class

F-type yellow-white

Effective Temperature

6,305 K — hotter than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

1.491 R☉

Stellar Mass

1.137 M☉

Metallicity [Fe/H]

-0.36

Extended Stellar Properties

Surface gravity (log g)

4.320 dex

Stellar density

3.356 g/cm³

Metallicity ratio

[M/H]

Distance

1,188.54 parsec

Light-years 3,876.49 ly

V-band magnitude

13.60 mag

Voyager-speed travel 68,361,977 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.813 mas

Total Proper Motion

2.781 mas/yr

PM Right Ascension

2.38 mas/yr

PM Declination

1.43 mas/yr

Galactic Cartesian (pc)

x = 0.268 · y = -0.715 · z = 0.646

Equatorial (J2000)

RA 290.55195° · Dec 40.23504°

Galactic ℓ, b

72.334° · 11.747°

Ecliptic λ, β

303.891° · 61.278°

HTM-20 index

-1035380622