Key parameters at a glance

A radius of 2.90 Earth radii
A mass of 8.76 Earth masses
Surface gravity around 1.04 g
An orbital period of 234.239 days
Semi-major axis 0.7609 AU
Equilibrium temperature 329 K (56 °C)
Distance from Earth 2,340.49 light-years
Earth Similarity Index 0.659
Travel time at Voyager 1 speed 41,274,463 years

Kepler-1700 b Planet Profile

Physical Specs

Radius

2.90 R⊕

Radius (Jupiter)

0.259 R♃

Mass

8.76 M⊕

Mass (Jupiter)

0.028 M♃

Density

1.97 g/cm³

Surface Gravity

1.04 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.659

HZ Position Inner

Controversial No

Discovery

Year 2020

Method Transit

Facility Kepler

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#620of 1978

top 31.3%

This planet

2.90R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-130 c 2.90 R⊕ Kepler-276 c 2.90 R⊕ Kepler-314 c 2.90 R⊕

Metric	Earth	Kepler-1700 b	Jupiter
Radius (R⊕)	1.00	2.90	11.21
Mass (M⊕)	1.00	8.76	317.83
Density (g/cm³)	5.51	1.97	1.33
Surface Gravity (g)	1.00	1.04	2.53
Insolation (S⊕)	1.00	2.20	0.037

Star Catalogue Identifiers

TIC

TIC 158325998

Gaia DR2

Gaia DR2 2106262274180389376

Gaia DR3

Gaia DR3 2106262274180389376

System

Kepler-1700

Percentile among Sub-Neptune cohort

Radius 2.901 R⊕ · percentile 69 / cohort 1978

Mass 8.760 M⊕ · percentile 63 / cohort 1978

Orbital period 234.24 d · percentile 99 / cohort 1946

Distance 717.60 pc · percentile 60 / cohort 1975

ESI 0.659 · percentile 89 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

234.239 days

Semi-major axis

0.7609 AU

Eccentricity

0.000

Inclination

89.02 °

Year Length

A year here lasts approximately 234.24 Earth days (64.1% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.7609 AU.

Transit Fingerprint

Depth

0.047 %

Duration

12.925 h

Impact parameter b

0.944

Rp / R★

0.024610

Transit midpoint (BJD)

2,455,043.8099

Photometric dip

Transit produces a flux drop of 467 ppm lasting ≈ 12.93 h.

Extended Orbital Architecture

Planet / star radius ratio

0.024610

Semi-major axis / stellar radius

55.400

Impact parameter (b)

0.944

Transit mid-time (BJD)

2,455,043.8099

Angular separation (arcsec)

1.06000

Eq. Temperature

329K

(56 °C)

Insolation (S⊕)

2.20

Earth = 1.00

Earth Similarity (ESI)

0.659

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

Armstrong et al. 2021

Instrument

Kepler CCD Array

Publication

2021-07

Observation locale

Space

Discovery cohort

Planets confirmed in 2020 at Kepler (12 shown).

Kepler-1649 c · Rocky Terrestrial Kepler-1701 b · Sub-Neptune Kepler-1690 b · Sub-Neptune Kepler-1684 b · Sub-Neptune Kepler-1678 b · Sub-Neptune Kepler-598 c · Sub-Neptune Kepler-1661 b · Sub-Neptune Kepler-1663 b · Sub-Neptune Kepler-1681 b · Sub-Neptune Kepler-1672 b · Sub-Neptune Kepler-1702 b · Super-Earth Kepler-1674 b · Sub-Neptune

Host System: Kepler-1700

Spectral Class

F-type yellow-white

Effective Temperature

6,031 K — hotter than the Sun (5,778 K)

Estimated Age

2.75 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.094 R☉

Stellar Mass

1.120 M☉

Metallicity [Fe/H]

0.07

Extended Stellar Properties

Surface gravity (log g)

4.410 dex

Stellar density

1.207 g/cm³

Metallicity ratio

[Fe/H]

Distance

717.60 parsec

Light-years 2,340.49 ly

V-band magnitude

13.76 mag

Voyager-speed travel 41,274,463 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.365 mas

Total Proper Motion

12.654 mas/yr

PM Right Ascension

0.88 mas/yr

PM Declination

-12.62 mas/yr

Galactic Cartesian (pc)

x = 0.205 · y = -0.672 · z = 0.711

Equatorial (J2000)

RA 286.94974° · Dec 45.35376°

Galactic ℓ, b

76.037° · 16.249°

Ecliptic λ, β

301.541° · 66.946°

HTM-20 index

-2047436216