Key parameters at a glance

A radius of 3.06 Earth radii
A mass of 9.58 Earth masses
Surface gravity around 1.02 g
An orbital period of 23.359 days
Semi-major axis 0.1637 AU
Equilibrium temperature 684 K (411 °C)
Distance from Earth 4,365.57 light-years
Earth Similarity Index 0.342
Travel time at Voyager 1 speed 76,986,742 years

Kepler-1797 b Planet Profile

Physical Specs

Radius

3.06 R⊕

Radius (Jupiter)

0.273 R♃

Mass

9.58 M⊕

Mass (Jupiter)

0.030 M♃

Density

1.84 g/cm³

Surface Gravity

1.02 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.342

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

#471of 1978

top 23.8%

This planet

3.06R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-351 b 3.06 R⊕ Kepler-151 b 3.06 R⊕ Kepler-760 b 3.06 R⊕

Metric	Earth	Kepler-1797 b	Jupiter
Radius (R⊕)	1.00	3.06	11.21
Mass (M⊕)	1.00	9.58	317.83
Density (g/cm³)	5.51	1.84	1.33
Surface Gravity (g)	1.00	1.02	2.53
Insolation (S⊕)	1.00	51.68	0.037

Star Catalogue Identifiers

TIC

TIC 63288848

Gaia DR2

Gaia DR2 2126749165104841088

Gaia DR3

Gaia DR3 2126749165104841088

System

Kepler-1797

Percentile among Sub-Neptune cohort

Radius 3.058 R⊕ · percentile 76 / cohort 1978

Mass 9.580 M⊕ · percentile 70 / cohort 1978

Orbital period 23.36 d · percentile 67 / cohort 1946

Distance 1,338.49 pc · percentile 90 / cohort 1975

ESI 0.342 · percentile 39 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

23.359 days

Semi-major axis

0.1637 AU

Eccentricity

0.000

Inclination

86.07 °

Year Length

A year here lasts approximately 23.36 Earth days (6.4% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1637 AU.

Transit Fingerprint

Depth

0.057 %

Duration

5.389 h

Impact parameter b

0.002

Rp / R★

0.022360

Transit midpoint (BJD)

2,454,977.0183

Photometric dip

Transit produces a flux drop of 570 ppm lasting ≈ 5.39 h.

Extended Orbital Architecture

Planet / star radius ratio

0.022360

Semi-major axis / stellar radius

37.800

Impact parameter (b)

0.002

Transit mid-time (BJD)

2,454,977.0183

Angular separation (arcsec)

0.12200

Eq. Temperature

684K

(411 °C)

Insolation (S⊕)

51.68

Earth = 1.00

Earth Similarity (ESI)

0.342

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-1797

Spectral Class

F-type yellow-white

Effective Temperature

6,244 K — hotter than the Sun (5,778 K)

Estimated Age

0.40 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.009 R☉

Stellar Mass

1.069 M☉

Metallicity [Fe/H]

-0.20

Extended Stellar Properties

Surface gravity (log g)

4.460 dex

Stellar density

0.090 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,338.49 parsec

Light-years 4,365.57 ly

V-band magnitude

15.42 mag

Voyager-speed travel 76,986,742 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.719 mas

Total Proper Motion

1.420 mas/yr

PM Right Ascension

0.03 mas/yr

PM Declination

-1.42 mas/yr

Galactic Cartesian (pc)

x = 0.266 · y = -0.642 · z = 0.719

Equatorial (J2000)

RA 292.46424° · Dec 45.96828°

Galactic ℓ, b

78.241° · 12.981°

Ecliptic λ, β

311.201° · 66.224°

HTM-20 index

-1055718088