Key parameters at a glance

A radius of 0.81 Earth radii
A mass of 0.45 Earth masses
Surface gravity around 0.69 g
An orbital period of 6.887 days
Semi-major axis 0.0657 AU
Equilibrium temperature 788 K (515 °C)
Distance from Earth 824.30 light-years
Earth Similarity Index 0.392
Travel time at Voyager 1 speed 14,536,597 years

2 siblings around Kepler-352

Kepler-352 d shares its host star with 2 other confirmed planets. Side-by-side measurements below.

Planet	Type	Radius (R⊕)	Mass (M⊕)	Period (d)	Eq. T (K)	Year
Kepler-352 d this	Rocky Terrestrial	0.81	0.45	6.887	788	2021
Kepler-352 b	Rocky Terrestrial	0.86	0.57	10.055	694	2014
Kepler-352 c	Rocky Terrestrial	1.24	2.07	16.333	591	2014

Kepler-352 d Planet Profile

Physical Specs

Radius

0.81 R⊕

Radius (Jupiter)

0.072 R♃

Mass

0.45 M⊕

Mass (Jupiter)

0.001 M♃

Density

4.71 g/cm³

Surface Gravity

0.69 g (Earth)

Classification

Planet Type

Rocky Terrestrial

ESI Score 0.392

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

#477of 570

top 83.5%

This planet

0.81R⊕

Rocky Terrestrial median

1.01R⊕

Nearest-size peers

Kepler-388 b 0.81 R⊕ Kepler-1611 b 0.81 R⊕ Kepler-220 b 0.81 R⊕

Metric	Earth	Kepler-352 d	Jupiter
Radius (R⊕)	1.00	0.81	11.21
Mass (M⊕)	1.00	0.45	317.83
Density (g/cm³)	5.51	4.71	1.33
Surface Gravity (g)	1.00	0.69	2.53
Insolation (S⊕)	1.00	81.30	0.037

Star Catalogue Identifiers

TIC

TIC 269271535

Gaia DR2

Gaia DR2 2085281530744134272

Gaia DR3

Gaia DR3 2085281530744134272

System

Kepler-352

Percentile among Rocky Terrestrial cohort

Radius 0.806 R⊕ · percentile 16 / cohort 570

Mass 0.449 M⊕ · percentile 14 / cohort 570

Orbital period 6.89 d · percentile 67 / cohort 567

Distance 252.73 pc · percentile 35 / cohort 566

ESI 0.392 · percentile 58 / cohort 570

Orbit & Habitability

Orbital Dynamics

Period

6.887 days

Semi-major axis

0.0657 AU

Eccentricity

0.000

Inclination

88.66 °

Year Length

A year here lasts approximately 6.89 Earth days (1.9% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0657 AU.

Transit Fingerprint

Depth

0.008 %

Duration

2.425 h

Impact parameter b

0.208

Rp / R★

0.008069

Transit midpoint (BJD)

2,454,965.0690

Photometric dip

Transit produces a flux drop of 80 ppm lasting ≈ 2.43 h.

Extended Orbital Architecture

Planet / star radius ratio

0.008069

Semi-major axis / stellar radius

21.410

Impact parameter (b)

0.208

Transit mid-time (BJD)

2,454,965.0690

Angular separation (arcsec)

0.26000

Eq. Temperature

788K

(515 °C)

Insolation (S⊕)

81.30

Earth = 1.00

Earth Similarity (ESI)

0.392

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-352

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,208 K — cooler than the Sun (5,778 K)

Estimated Age

1.70 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.772 R☉

Stellar Mass

0.796 M☉

Metallicity [Fe/H]

-0.14

Extended Stellar Properties

Surface gravity (log g)

4.563 dex

Stellar density

3.680 g/cm³

Systemic radial velocity

-5.87 km/s

Metallicity ratio

[Fe/H]

Distance

252.73 parsec

Light-years 824.30 ly

V-band magnitude

13.14 mag

Voyager-speed travel 14,536,597 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

3.928 mas

Total Proper Motion

24.538 mas/yr

PM Right Ascension

13.85 mas/yr

PM Declination

-20.25 mas/yr

Galactic Cartesian (pc)

x = 0.346 · y = -0.602 · z = 0.720

Equatorial (J2000)

RA 299.89662° · Dec 46.05190°

Galactic ℓ, b

80.798° · 8.472°

Ecliptic λ, β

322.477° · 64.143°

HTM-20 index

-1955098591