Key parameters at a glance

A radius of 1.89 Earth radii
A mass of 4.23 Earth masses
Surface gravity around 1.18 g
An orbital period of 12.902 days
Semi-major axis 0.1030 AU
Equilibrium temperature 675 K (402 °C)
Distance from Earth 2,964.88 light-years
Earth Similarity Index 0.415
Travel time at Voyager 1 speed 52,285,633 years

Kepler-1917 b Planet Profile

Physical Specs

Radius

1.89 R⊕

Radius (Jupiter)

0.169 R♃

Mass

4.23 M⊕

Mass (Jupiter)

0.013 M♃

Density

3.44 g/cm³

Surface Gravity

1.18 g (Earth)

Classification

Planet Type

Super-Earth

ESI Score 0.415

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

#151of 1176

top 12.8%

This planet

1.89R⊕

Super-Earth median

1.60R⊕

Nearest-size peers

Kepler-171 d 1.89 R⊕ Kepler-371 b 1.89 R⊕ K2-13 b 1.89 R⊕

Metric	Earth	Kepler-1917 b	Jupiter
Radius (R⊕)	1.00	1.89	11.21
Mass (M⊕)	1.00	4.23	317.83
Density (g/cm³)	5.51	3.44	1.33
Surface Gravity (g)	1.00	1.18	2.53
Insolation (S⊕)	1.00	48.99	0.037

Star Catalogue Identifiers

TIC

TIC 270857590

Gaia DR2

Gaia DR2 2079911859548385536

Gaia DR3

Gaia DR3 2079911859548385536

System

Kepler-1917

Percentile among Super-Earth cohort

Radius 1.890 R⊕ · percentile 87 / cohort 1176

Mass 4.230 M⊕ · percentile 80 / cohort 1176

Orbital period 12.90 d · percentile 72 / cohort 1164

Distance 909.04 pc · percentile 76 / cohort 1171

ESI 0.415 · percentile 63 / cohort 1176

Orbit & Habitability

Orbital Dynamics

Period

12.902 days

Semi-major axis

0.1030 AU

Eccentricity

0.000

Inclination

89.42 °

Year Length

A year here lasts approximately 12.90 Earth days (3.5% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1030 AU.

Transit Fingerprint

Depth

0.035 %

Duration

2.446 h

Impact parameter b

0.382

Rp / R★

0.017349

Transit midpoint (BJD)

2,454,972.1511

Photometric dip

Transit produces a flux drop of 354 ppm lasting ≈ 2.45 h.

Extended Orbital Architecture

Planet / star radius ratio

0.017349

Semi-major axis / stellar radius

39.720

Impact parameter (b)

0.382

Transit mid-time (BJD)

2,454,972.1511

Angular separation (arcsec)

0.11300

Eq. Temperature

675K

(402 °C)

Insolation (S⊕)

48.99

Earth = 1.00

Earth Similarity (ESI)

0.415

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-1917

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,530 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

0.788 R☉

Stellar Mass

0.882 M☉

Metallicity [Fe/H]

-0.22

Extended Stellar Properties

Surface gravity (log g)

4.586 dex

Stellar density

6.238 g/cm³

Metallicity ratio

[Fe/H]

Distance

909.04 parsec

Light-years 2,964.88 ly

V-band magnitude

15.47 mag

Voyager-speed travel 52,285,633 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.072 mas

Total Proper Motion

14.114 mas/yr

PM Right Ascension

-4.59 mas/yr

PM Declination

-13.35 mas/yr

Galactic Cartesian (pc)

x = 0.289 · y = -0.645 · z = 0.707

Equatorial (J2000)

RA 294.10389° · Dec 45.00135°

Galactic ℓ, b

77.878° · 11.521°

Ecliptic λ, β

312.883° · 64.892°

HTM-20 index

-1693644989