Key parameters at a glance

A radius of 1.19 Earth radii
A mass of 1.84 Earth masses
Surface gravity around 1.29 g
An orbital period of 7.718 days
Semi-major axis 0.0621 AU
Equilibrium temperature 502 K (229 °C)
Distance from Earth 800.07 light-years
Earth Similarity Index 0.616
Travel time at Voyager 1 speed 14,109,242 years
Almost certainly tidally locked to its host star given the close orbit

Kepler-1735 b Planet Profile

Physical Specs

Radius

1.19 R⊕

Radius (Jupiter)

0.107 R♃

Mass

1.84 M⊕

Mass (Jupiter)

0.006 M♃

Density

5.94 g/cm³

Surface Gravity

1.29 g (Earth)

Classification

Planet Type

Rocky Terrestrial

ESI Score 0.616

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

#97of 570

top 16.8%

This planet

1.19R⊕

Rocky Terrestrial median

1.01R⊕

Nearest-size peers

GJ 1252 b 1.19 R⊕ GJ 1132 b 1.19 R⊕ K2-384 c 1.19 R⊕

Metric	Earth	Kepler-1735 b	Jupiter
Radius (R⊕)	1.00	1.19	11.21
Mass (M⊕)	1.00	1.84	317.83
Density (g/cm³)	5.51	5.94	1.33
Surface Gravity (g)	1.00	1.29	2.53
Insolation (S⊕)	1.00	15.01	0.037

Star Catalogue Identifiers

TIC

TIC 123206821

Gaia DR2

Gaia DR2 2119222252094710912

Gaia DR3

Gaia DR3 2119222252094710912

System

Kepler-1735

Percentile among Rocky Terrestrial cohort

Radius 1.194 R⊕ · percentile 83 / cohort 570

Mass 1.840 M⊕ · percentile 76 / cohort 570

Orbital period 7.72 d · percentile 71 / cohort 567

Distance 245.30 pc · percentile 34 / cohort 566

ESI 0.616 · percentile 79 / cohort 570

Orbit & Habitability

Orbital Dynamics

Period

7.718 days

Semi-major axis

0.0621 AU

Eccentricity

0.000

Inclination

89.80 °

Year Length

A year here lasts approximately 7.72 Earth days (2.1% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0621 AU.

Transit Fingerprint

Depth

0.032 %

Duration

1.840 h

Impact parameter b

0.091

Rp / R★

0.016271

Transit midpoint (BJD)

2,454,972.1541

Photometric dip

Transit produces a flux drop of 319 ppm lasting ≈ 1.84 h.

Extended Orbital Architecture

Planet / star radius ratio

0.016271

Semi-major axis / stellar radius

32.370

Impact parameter (b)

0.091

Transit mid-time (BJD)

2,454,972.1541

Angular separation (arcsec)

0.25300

Eq. Temperature

502K

(229 °C)

Insolation (S⊕)

15.01

Earth = 1.00

Earth Similarity (ESI)

0.616

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water. Close-orbiting tidally-locked around a cool host.

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-1735

Spectral Class

K-type orange

Effective Temperature

3,975 K — cooler than the Sun (5,778 K)

Estimated Age

8.17 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

0.509 R☉

Stellar Mass

0.535 M☉

Metallicity [Fe/H]

-0.34

Extended Stellar Properties

Surface gravity (log g)

4.753 dex

Stellar density

10.768 g/cm³

Metallicity ratio

[Fe/H]

Distance

245.30 parsec

Light-years 800.07 ly

V-band magnitude

15.90 mag

Voyager-speed travel 14,109,242 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

4.048 mas

Total Proper Motion

30.315 mas/yr

PM Right Ascension

28.83 mas/yr

PM Declination

9.38 mas/yr

Galactic Cartesian (pc)

x = 0.130 · y = -0.667 · z = 0.734

Equatorial (J2000)

RA 281.05035° · Dec 47.18820°

Galactic ℓ, b

76.366° · 20.708°

Ecliptic λ, β

292.136° · 69.780°

HTM-20 index

2011434822