Key parameters at a glance

A radius of 2.81 Earth radii
A mass of 8.29 Earth masses
Surface gravity around 1.05 g
An orbital period of 65.941 days
Semi-major axis 0.3244 AU
Equilibrium temperature 454 K (181 °C)
Distance from Earth 4,913.08 light-years
Earth Similarity Index 0.516
Travel time at Voyager 1 speed 86,642,223 years

Kepler-1696 b Planet Profile

Physical Specs

Radius

2.81 R⊕

Radius (Jupiter)

0.251 R♃

Mass

8.29 M⊕

Mass (Jupiter)

0.026 M♃

Density

2.05 g/cm³

Surface Gravity

1.05 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.516

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

#740of 1978

top 37.4%

This planet

2.81R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-892 b 2.81 R⊕ Kepler-752 b 2.81 R⊕ Kepler-1234 b 2.81 R⊕

Metric	Earth	Kepler-1696 b	Jupiter
Radius (R⊕)	1.00	2.81	11.21
Mass (M⊕)	1.00	8.29	317.83
Density (g/cm³)	5.51	2.05	1.33
Surface Gravity (g)	1.00	1.05	2.53
Insolation (S⊕)	1.00	10.04	0.037

Star Catalogue Identifiers

TIC

TIC 271755153

Gaia DR2

Gaia DR2 2077107211548933504

Gaia DR3

Gaia DR3 2077107211548933504

System

Kepler-1696

Percentile among Sub-Neptune cohort

Radius 2.810 R⊕ · percentile 63 / cohort 1978

Mass 8.290 M⊕ · percentile 57 / cohort 1978

Orbital period 65.94 d · percentile 90 / cohort 1946

Distance 1,506.36 pc · percentile 93 / cohort 1975

ESI 0.516 · percentile 72 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

65.941 days

Semi-major axis

0.3244 AU

Eccentricity

0.000

Inclination

89.70 °

Year Length

A year here lasts approximately 65.94 Earth days (18.1% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.3244 AU.

Transit Fingerprint

Depth

0.058 %

Duration

7.776 h

Impact parameter b

0.011

Rp / R★

0.022220

Transit midpoint (BJD)

2,455,064.9716

Photometric dip

Transit produces a flux drop of 580 ppm lasting ≈ 7.78 h.

Extended Orbital Architecture

Planet / star radius ratio

0.022220

Semi-major axis / stellar radius

67.220

Impact parameter (b)

0.011

Transit mid-time (BJD)

2,455,064.9716

Angular separation (arcsec)

0.21500

Eq. Temperature

454K

(181 °C)

Insolation (S⊕)

10.04

Earth = 1.00

Earth Similarity (ESI)

0.516

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

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-1700 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

Host System: Kepler-1696

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,712 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

1.198 R☉

Stellar Mass

1.020 M☉

Metallicity [Fe/H]

-0.04

Extended Stellar Properties

Surface gravity (log g)

4.290 dex

Stellar density

0.836 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,506.36 parsec

Light-years 4,913.08 ly

V-band magnitude

15.51 mag

Voyager-speed travel 86,642,223 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.636 mas

Total Proper Motion

5.837 mas/yr

PM Right Ascension

5.53 mas/yr

PM Declination

1.86 mas/yr

Galactic Cartesian (pc)

x = 0.321 · y = -0.670 · z = 0.669

Equatorial (J2000)

RA 295.57610° · Dec 42.02336°

Galactic ℓ, b

75.703° · 9.190°

Ecliptic λ, β

312.618° · 61.731°

HTM-20 index

-1070124561