Key parameters at a glance

A radius of 3.77 Earth radii
A mass of 13.60 Earth masses
Surface gravity around 0.96 g
An orbital period of 37.101 days
Semi-major axis 0.2095 AU
Equilibrium temperature 532 K (259 °C)
Distance from Earth 3,560.42 light-years
Earth Similarity Index 0.397
Travel time at Voyager 1 speed 62,787,946 years

Kepler-1744 b Planet Profile

Physical Specs

Radius

3.77 R⊕

Radius (Jupiter)

0.336 R♃

Mass

13.60 M⊕

Mass (Jupiter)

0.043 M♃

Density

1.40 g/cm³

Surface Gravity

0.96 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.397

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

#67of 1978

top 3.3%

This planet

3.77R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-315 b 3.77 R⊕ K2-276 b 3.77 R⊕ HD 141004 b 3.77 R⊕

Metric	Earth	Kepler-1744 b	Jupiter
Radius (R⊕)	1.00	3.77	11.21
Mass (M⊕)	1.00	13.60	317.83
Density (g/cm³)	5.51	1.40	1.33
Surface Gravity (g)	1.00	0.96	2.53
Insolation (S⊕)	1.00	21.00	0.037

Star Catalogue Identifiers

TIC

TIC 159575346

Gaia DR2

Gaia DR2 2101955968172274432

Gaia DR3

Gaia DR3 2101955968172274432

System

Kepler-1744

Percentile among Sub-Neptune cohort

Radius 3.768 R⊕ · percentile 97 / cohort 1978

Mass 13.600 M⊕ · percentile 89 / cohort 1978

Orbital period 37.10 d · percentile 79 / cohort 1946

Distance 1,091.63 pc · percentile 83 / cohort 1975

ESI 0.397 · percentile 51 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

37.101 days

Semi-major axis

0.2095 AU

Eccentricity

0.000

Inclination

89.52 °

Year Length

A year here lasts approximately 37.10 Earth days (10.2% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.2094 AU.

Transit Fingerprint

Depth

0.136 %

Duration

5.556 h

Impact parameter b

0.550

Rp / R★

0.034349

Transit midpoint (BJD)

2,455,203.4803

Photometric dip

Transit produces a flux drop of 1,358 ppm lasting ≈ 5.56 h.

Extended Orbital Architecture

Planet / star radius ratio

0.034349

Semi-major axis / stellar radius

43.800

Impact parameter (b)

0.550

Transit mid-time (BJD)

2,455,203.4803

Angular separation (arcsec)

0.19200

Eq. Temperature

532K

(259 °C)

Insolation (S⊕)

21.00

Earth = 1.00

Earth Similarity (ESI)

0.397

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-1744

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,986 K — hotter than the Sun (5,778 K)

Estimated Age

7.76 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

0.850 R☉

Stellar Mass

0.886 M☉

Metallicity [Fe/H]

-0.50

Extended Stellar Properties

Surface gravity (log g)

4.527 dex

Stellar density

1.564 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,091.63 parsec

Light-years 3,560.42 ly

V-band magnitude

15.57 mag

Voyager-speed travel 62,787,946 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.888 mas

Total Proper Motion

3.456 mas/yr

PM Right Ascension

-1.89 mas/yr

PM Declination

2.89 mas/yr

Galactic Cartesian (pc)

x = 0.265 · y = -0.689 · z = 0.675

Equatorial (J2000)

RA 291.02068° · Dec 42.46246°

Galactic ℓ, b

74.543° · 12.394°

Ecliptic λ, β

306.068° · 63.293°

HTM-20 index

402092939