Key parameters at a glance

A radius of 3.88 Earth radii
A mass of 14.30 Earth masses
Surface gravity around 0.95 g
An orbital period of 37.810 days
Semi-major axis 0.2188 AU
Equilibrium temperature 566 K (293 °C)
Distance from Earth 4,664.03 light-years
Earth Similarity Index 0.371
Travel time at Voyager 1 speed 82,250,179 years

Kepler-1736 b Planet Profile

Physical Specs

Radius

3.88 R⊕

Radius (Jupiter)

0.346 R♃

Mass

14.30 M⊕

Mass (Jupiter)

0.045 M♃

Density

1.35 g/cm³

Surface Gravity

0.95 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.371

HZ Position Inner

Controversial No

Discovery

Year 2021

Method Transit

Facility Kepler

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#37of 1978

top 1.8%

This planet

3.88R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

K2-19 c 3.88 R⊕ Kepler-368 c 3.88 R⊕ K2-100 b 3.88 R⊕

Metric	Earth	Kepler-1736 b	Jupiter
Radius (R⊕)	1.00	3.88	11.21
Mass (M⊕)	1.00	14.30	317.83
Density (g/cm³)	5.51	1.35	1.33
Surface Gravity (g)	1.00	0.95	2.53
Insolation (S⊕)	1.00	24.27	0.037

Star Catalogue Identifiers

TIC

TIC 394179552

Gaia DR2

Gaia DR2 2051368056655683328

Gaia DR3

Gaia DR3 2051368056655683328

System

Kepler-1736

Percentile among Sub-Neptune cohort

Radius 3.877 R⊕ · percentile 98 / cohort 1978

Mass 14.300 M⊕ · percentile 91 / cohort 1978

Orbital period 37.81 d · percentile 79 / cohort 1946

Distance 1,430.00 pc · percentile 92 / cohort 1975

ESI 0.371 · percentile 46 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

37.810 days

Semi-major axis

0.2188 AU

Eccentricity

0.000

Inclination

89.90 °

Year Length

A year here lasts approximately 37.81 Earth days (10.4% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.2188 AU.

Transit Fingerprint

Depth

0.057 %

Duration

8.733 h

Impact parameter b

0.423

Rp / R★

0.021892

Transit midpoint (BJD)

2,454,991.3580

Photometric dip

Transit produces a flux drop of 570 ppm lasting ≈ 8.73 h.

Extended Orbital Architecture

Planet / star radius ratio

0.021892

Semi-major axis / stellar radius

33.740

Impact parameter (b)

0.423

Transit mid-time (BJD)

2,454,991.3580

Angular separation (arcsec)

0.15300

Eq. Temperature

566K

(293 °C)

Insolation (S⊕)

24.27

Earth = 1.00

Earth Similarity (ESI)

0.371

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

Valizadegan et al. 2022

Instrument

Kepler CCD Array

Publication

2022-02

Observation locale

Space

Discovery cohort

Planets confirmed in 2021 at Kepler (12 shown).

Kepler-1816 b · Super-Earth Kepler-1705 c · Sub-Neptune Kepler-1948 b · Rocky Terrestrial Kepler-196 d · Sub-Neptune Kepler-1853 b · Super-Earth Kepler-1840 b · Sub-Neptune Kepler-1881 b · Sub-Neptune Kepler-1858 b · Sub-Neptune Kepler-1874 b · Sub-Neptune Kepler-1802 c · Sub-Neptune Kepler-1749 b · Super-Earth Kepler-1849 b · Sub-Neptune

Host System: Kepler-1736

Spectral Class

F-type yellow-white

Effective Temperature

6,085 K — hotter than the Sun (5,778 K)

Estimated Age

1.70 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.973 R☉

Stellar Mass

0.976 M☉

Metallicity [Fe/H]

-0.28

Extended Stellar Properties

Surface gravity (log g)

4.451 dex

Stellar density

0.508 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,430.00 parsec

Light-years 4,664.03 ly

V-band magnitude

14.81 mag

Voyager-speed travel 82,250,179 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.671 mas

Total Proper Motion

6.714 mas/yr

PM Right Ascension

-0.60 mas/yr

PM Declination

-6.69 mas/yr

Galactic Cartesian (pc)

x = 0.266 · y = -0.739 · z = 0.619

Equatorial (J2000)

RA 289.77670° · Dec 38.26224°

Galactic ℓ, b

70.253° · 11.432°

Ecliptic λ, β

301.612° · 59.550°

HTM-20 index

-411282719