Key parameters at a glance

A radius of 1.49 Earth radii
A mass of 2.82 Earth masses
Surface gravity around 1.27 g
An orbital period of 2.505 days
Semi-major axis 0.0352 AU
Equilibrium temperature 1,369 K (1096 °C)
Distance from Earth 2,641.53 light-years
Earth Similarity Index 0.211
Travel time at Voyager 1 speed 46,583,338 years

2 siblings around Kepler-1073

Kepler-1073 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-1073 d this	Super-Earth	1.49	2.82	2.505	1,369	2021
Kepler-1073 c	Super-Earth	1.64	3.33	4.026	1,169	2016
Kepler-1073 b	Sub-Neptune	2.30	5.90	8.679	905	2016

Kepler-1073 d Planet Profile

Physical Specs

Radius

1.49 R⊕

Radius (Jupiter)

0.133 R♃

Mass

2.82 M⊕

Mass (Jupiter)

0.009 M♃

Density

4.71 g/cm³

Surface Gravity

1.27 g (Earth)

Classification

Planet Type

Super-Earth

ESI Score 0.211

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

#781of 1176

top 66.3%

This planet

1.49R⊕

Super-Earth median

1.60R⊕

Nearest-size peers

Kepler-1882 b 1.49 R⊕ Kepler-1841 b 1.49 R⊕ Kepler-174 c 1.49 R⊕

Metric	Earth	Kepler-1073 d	Jupiter
Radius (R⊕)	1.00	1.49	11.21
Mass (M⊕)	1.00	2.82	317.83
Density (g/cm³)	5.51	4.71	1.33
Surface Gravity (g)	1.00	1.27	2.53
Insolation (S⊕)	1.00	828.59	0.037

Star Catalogue Identifiers

TIC

TIC 138568416

Gaia DR2

Gaia DR2 2052069201482198784

Gaia DR3

Gaia DR3 2052069201482198784

System

Kepler-1073

Percentile among Super-Earth cohort

Radius 1.488 R⊕ · percentile 34 / cohort 1176

Mass 2.820 M⊕ · percentile 32 / cohort 1176

Orbital period 2.50 d · percentile 16 / cohort 1164

Distance 809.90 pc · percentile 68 / cohort 1171

ESI 0.211 · percentile 15 / cohort 1176

Orbit & Habitability

Orbital Dynamics

Period

2.505 days

Semi-major axis

0.0352 AU

Eccentricity

0.000

Inclination

89.08 °

Year Length

A year here lasts approximately 2.50 Earth days (0.7% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0352 AU.

Transit Fingerprint

Depth

0.018 %

Duration

2.523 h

Impact parameter b

0.130

Rp / R★

0.012140

Transit midpoint (BJD)

2,454,966.6354

Photometric dip

Transit produces a flux drop of 181 ppm lasting ≈ 2.52 h.

Extended Orbital Architecture

Planet / star radius ratio

0.012140

Semi-major axis / stellar radius

8.106

Impact parameter (b)

0.130

Transit mid-time (BJD)

2,454,966.6354

Angular separation (arcsec)

0.04350

Eq. Temperature

1,369K

(1096 °C)

Insolation (S⊕)

828.59

Earth = 1.00

Earth Similarity (ESI)

0.211

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched.

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-1073

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,509 K — cooler than the Sun (5,778 K)

Estimated Age

3.72 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.116 R☉

Stellar Mass

0.924 M☉

Metallicity [Fe/H]

0.16

Extended Stellar Properties

Surface gravity (log g)

4.308 dex

Stellar density

1.606 g/cm³

Metallicity ratio

[Fe/H]

Distance

809.90 parsec

Light-years 2,641.53 ly

V-band magnitude

14.75 mag

Voyager-speed travel 46,583,338 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.206 mas

Total Proper Motion

12.119 mas/yr

PM Right Ascension

4.72 mas/yr

PM Declination

11.16 mas/yr

Galactic Cartesian (pc)

x = 0.321 · y = -0.717 · z = 0.619

Equatorial (J2000)

RA 294.15273° · Dec 38.23309°

Galactic ℓ, b

71.804° · 8.354°

Ecliptic λ, β

307.993° · 58.528°

HTM-20 index

1080867558