Key parameters at a glance

A radius of 1.04 Earth radii
A mass of 1.12 Earth masses
Surface gravity around 1.04 g
An orbital period of 1.090 days
Semi-major axis 0.0197 AU
Equilibrium temperature 1,402 K (1129 °C)
Distance from Earth 2,532.76 light-years
Earth Similarity Index 0.221
Travel time at Voyager 1 speed 44,665,298 years
Almost certainly tidally locked to its host star given the close orbit

1 sibling around Kepler-2001

Kepler-2001 b shares its host star with 1 other confirmed planet. Side-by-side measurements below.

Planet	Type	Radius (R⊕)	Mass (M⊕)	Period (d)	Eq. T (K)	Year
Kepler-2001 b this	Rocky Terrestrial	1.04	1.12	1.090	1,402	2023
Kepler-2001 c	Super-Earth	1.82	3.97	14.093	597	2023

Kepler-2001 b Planet Profile

Physical Specs

Radius

1.04 R⊕

Radius (Jupiter)

0.093 R♃

Mass

1.12 M⊕

Mass (Jupiter)

0.004 M♃

Density

5.47 g/cm³

Surface Gravity

1.04 g (Earth)

Classification

Planet Type

Rocky Terrestrial

ESI Score 0.221

HZ Position Inner

Controversial No

Discovery

Year 2023

Method Transit

Facility Kepler

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#288of 570

top 50.4%

This planet

1.04R⊕

Rocky Terrestrial median

1.01R⊕

Nearest-size peers

Kepler-1409 b 1.04 R⊕ EPIC 201841433 b 1.04 R⊕ Kepler-1578 b 1.04 R⊕

Metric	Earth	Kepler-2001 b	Jupiter
Radius (R⊕)	1.00	1.04	11.21
Mass (M⊕)	1.00	1.12	317.83
Density (g/cm³)	5.51	5.47	1.33
Surface Gravity (g)	1.00	1.04	2.53
Insolation (S⊕)	1.00	911.28	0.037

Star Catalogue Identifiers

TIC

TIC 26488618

Gaia DR2

Gaia DR2 2130124219123552256

Gaia DR3

Gaia DR3 2130124219123552256

System

Kepler-2001

Percentile among Rocky Terrestrial cohort

Radius 1.040 R⊕ · percentile 48 / cohort 570

Mass 1.120 M⊕ · percentile 43 / cohort 570

Orbital period 1.09 d · percentile 12 / cohort 567

Distance 776.55 pc · percentile 84 / cohort 566

ESI 0.221 · percentile 17 / cohort 570

Orbit & Habitability

Orbital Dynamics

Period

1.090 days

Semi-major axis

0.0197 AU

Eccentricity

0.000

Inclination

83.71 °

Year Length

A year here lasts approximately 1.09 Earth days (0.3% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0197 AU.

Transit Fingerprint

Depth

0.017 %

Duration

1.500 h

Impact parameter b

0.531

Rp / R★

0.012356

Transit midpoint (BJD)

2,454,964.5807

Photometric dip

Transit produces a flux drop of 175 ppm lasting ≈ 1.50 h.

Extended Orbital Architecture

Planet / star radius ratio

0.012356

Semi-major axis / stellar radius

4.840

Impact parameter (b)

0.531

Transit mid-time (BJD)

2,454,964.5807

Angular separation (arcsec)

0.02540

Eq. Temperature

1,402K

(1129 °C)

Insolation (S⊕)

911.28

Earth = 1.00

Earth Similarity (ESI)

0.221

0 = alien, 1 = Earth-identical

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

Discovery Paper

Primary reference

Valizadegan et al. 2023

Instrument

Kepler CCD Array

Publication

2023-05

Observation locale

Space

Discovery cohort

Planets confirmed in 2023 at Kepler (12 shown).

Kepler-1126 c · Super-Earth Kepler-2000 c · Super-Earth Kepler-1052 c · Sub-Neptune Kepler-311 d · Sub-Neptune Kepler-1996 c · Sub-Neptune Kepler-1162 c · Super-Earth Kepler-1996 b · Sub-Neptune Kepler-1610 c · Sub-Neptune Kepler-1801 c · Sub-Neptune Kepler-1995 b · Neptune-like Kepler-1992 b · Rocky Terrestrial Kepler-1986 b · Super-Earth

Host System: Kepler-2001

Spectral Class

K-type orange

Effective Temperature

5,081 K — cooler than the Sun (5,778 K)

Estimated Age

4.00 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.770 R☉

Stellar Mass

0.864 M☉

Metallicity [Fe/H]

0.12

Extended Stellar Properties

Surface gravity (log g)

4.596 dex

Stellar density

1.808 g/cm³

Metallicity ratio

[Fe/H]

Distance

776.55 parsec

Light-years 2,532.76 ly

V-band magnitude

15.98 mag

Voyager-speed travel 44,665,298 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.260 mas

Total Proper Motion

7.901 mas/yr

PM Right Ascension

-5.65 mas/yr

PM Declination

-5.52 mas/yr

Galactic Cartesian (pc)

x = 0.234 · y = -0.590 · z = 0.773

Equatorial (J2000)

RA 291.65946° · Dec 50.58386°

Galactic ℓ, b

82.323° · 15.416°

Ecliptic λ, β

315.025° · 70.655°

HTM-20 index

143993115