Key parameters at a glance

A radius of 3.09 Earth radii
A mass of 9.74 Earth masses
Surface gravity around 1.02 g
An orbital period of 6.797 days
Semi-major axis 0.0714 AU
Equilibrium temperature 985 K (712 °C)
Distance from Earth 4,836.34 light-years
Earth Similarity Index 0.234
Travel time at Voyager 1 speed 85,288,834 years

Kepler-1734 b Planet Profile

Physical Specs

Radius

3.09 R⊕

Radius (Jupiter)

0.276 R♃

Mass

9.74 M⊕

Mass (Jupiter)

0.031 M♃

Density

1.82 g/cm³

Surface Gravity

1.02 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.234

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

#446of 1978

top 22.5%

This planet

3.09R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

TOI-1696 b 3.09 R⊕ Kepler-859 b 3.09 R⊕ Kepler-563 b 3.09 R⊕

Metric	Earth	Kepler-1734 b	Jupiter
Radius (R⊕)	1.00	3.09	11.21
Mass (M⊕)	1.00	9.74	317.83
Density (g/cm³)	5.51	1.82	1.33
Surface Gravity (g)	1.00	1.02	2.53
Insolation (S⊕)	1.00	222.91	0.037

Star Catalogue Identifiers

TIC

TIC 138636741

Gaia DR2

Gaia DR2 2077403633010654976

Gaia DR3

Gaia DR3 2077403633010654976

System

Kepler-1734

Percentile among Sub-Neptune cohort

Radius 3.089 R⊕ · percentile 77 / cohort 1978

Mass 9.740 M⊕ · percentile 71 / cohort 1978

Orbital period 6.80 d · percentile 21 / cohort 1946

Distance 1,482.83 pc · percentile 93 / cohort 1975

ESI 0.234 · percentile 13 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

6.797 days

Semi-major axis

0.0714 AU

Eccentricity

0.000

Inclination

87.32 °

Year Length

A year here lasts approximately 6.80 Earth days (1.9% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0714 AU.

Transit Fingerprint

Depth

0.039 %

Duration

3.226 h

Impact parameter b

0.929

Rp / R★

0.022310

Transit midpoint (BJD)

2,454,971.1132

Photometric dip

Transit produces a flux drop of 393 ppm lasting ≈ 3.23 h.

Extended Orbital Architecture

Planet / star radius ratio

0.022310

Semi-major axis / stellar radius

6.720

Impact parameter (b)

0.929

Transit mid-time (BJD)

2,454,971.1132

Angular separation (arcsec)

0.04820

Eq. Temperature

985K

(712 °C)

Insolation (S⊕)

222.91

Earth = 1.00

Earth Similarity (ESI)

0.234

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-1734

Spectral Class

F-type yellow-white

Effective Temperature

6,061 K — hotter than the Sun (5,778 K)

Estimated Age

0.30 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.970 R☉

Stellar Mass

1.050 M☉

Metallicity [Fe/H]

-0.10

Extended Stellar Properties

Surface gravity (log g)

4.486 dex

Stellar density

0.955 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,482.83 parsec

Light-years 4,836.34 ly

V-band magnitude

15.60 mag

Voyager-speed travel 85,288,834 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.646 mas

Total Proper Motion

18.144 mas/yr

PM Right Ascension

-5.91 mas/yr

PM Declination

-17.15 mas/yr

Galactic Cartesian (pc)

x = 0.307 · y = -0.684 · z = 0.662

Equatorial (J2000)

RA 294.16317° · Dec 41.45173°

Galactic ℓ, b

74.689° · 9.852°

Ecliptic λ, β

310.116° · 61.568°

HTM-20 index

1455862975