Key parameters at a glance

A radius of 1.21 Earth radii
A mass of 1.92 Earth masses
Surface gravity around 1.31 g
An orbital period of 6.195 days
Semi-major axis 0.0620 AU
Equilibrium temperature 776 K (503 °C)
Distance from Earth 1,325.92 light-years
Earth Similarity Index 0.406
Travel time at Voyager 1 speed 23,382,575 years
Almost certainly tidally locked to its host star given the close orbit

4 siblings around Kepler-169

Kepler-169 c shares its host star with 4 other confirmed planets. Side-by-side measurements below.

Planet	Type	Radius (R⊕)	Mass (M⊕)	Period (d)	Eq. T (K)	Year
Kepler-169 b	Rocky Terrestrial	1.13	1.51	3.251	962	2014
Kepler-169 c this	Rocky Terrestrial	1.21	1.92	6.195	776	2014
Kepler-169 d	Super-Earth	1.25	2.10	8.348	702	2014
Kepler-169 e	Sub-Neptune	2.20	5.48	13.767	595	2014
Kepler-169 f	Sub-Neptune	2.58	7.18	87.090	321	2014

Kepler-169 c Planet Profile

Physical Specs

Radius

1.21 R⊕

Radius (Jupiter)

0.108 R♃

Mass

1.92 M⊕

Mass (Jupiter)

0.006 M♃

Density

5.96 g/cm³

Surface Gravity

1.31 g (Earth)

Classification

Planet Type

Rocky Terrestrial

ESI Score 0.406

HZ Position Inner

Controversial No

Discovery

Year 2014

Method Transit

Facility Kepler

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#56of 570

top 9.6%

This planet

1.21R⊕

Rocky Terrestrial median

1.01R⊕

Nearest-size peers

Kepler-415 b 1.21 R⊕ Kepler-189 b 1.21 R⊕ Kepler-81 d 1.21 R⊕

Metric	Earth	Kepler-169 c	Jupiter
Radius (R⊕)	1.00	1.21	11.21
Mass (M⊕)	1.00	1.92	317.83
Density (g/cm³)	5.51	5.96	1.33
Surface Gravity (g)	1.00	1.31	2.53
Insolation (S⊕)	1.00	82.85	0.037

Star Catalogue Identifiers

TIC

TIC 120689253

Gaia DR2

Gaia DR2 2103788854053938816

Gaia DR3

Gaia DR3 2103788854053938816

System

Kepler-169

Percentile among Rocky Terrestrial cohort

Radius 1.210 R⊕ · percentile 87 / cohort 570

Mass 1.920 M⊕ · percentile 80 / cohort 570

Orbital period 6.20 d · percentile 63 / cohort 567

Distance 406.53 pc · percentile 54 / cohort 566

ESI 0.406 · percentile 61 / cohort 570

Orbit & Habitability

Orbital Dynamics

Period

6.195 days

Semi-major axis

0.0620 AU

Eccentricity

0.000

Inclination

87.06 °

Year Length

A year here lasts approximately 6.20 Earth days (1.7% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0620 AU.

Transit Fingerprint

Depth

0.030 %

Duration

3.056 h

Impact parameter b

0.040

Rp / R★

0.014316

Transit midpoint (BJD)

2,454,967.7162

Photometric dip

Transit produces a flux drop of 296 ppm lasting ≈ 3.06 h.

Extended Orbital Architecture

Planet / star radius ratio

0.014316

Semi-major axis / stellar radius

17.440

Impact parameter (b)

0.040

Transit mid-time (BJD)

2,454,967.7162

Angular separation (arcsec)

0.15300

Eq. Temperature

776K

(503 °C)

Insolation (S⊕)

82.85

Earth = 1.00

Earth Similarity (ESI)

0.406

0 = alien, 1 = Earth-identical

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

Discovery Paper

Primary reference

Rowe et al. 2014

Instrument

Kepler CCD Array

Publication

2014-03

Observation locale

Space

Discovery cohort

Planets confirmed in 2014 at Kepler (12 shown).

Kepler-186 e · Super-Earth Kepler-395 c · Super-Earth Kepler-220 e · Super-Earth Kepler-249 d · Super-Earth Kepler-296 f · Super-Earth Kepler-367 c · Rocky Terrestrial Kepler-296 e · Super-Earth Kepler-155 c · Sub-Neptune Kepler-138 d · Super-Earth Kepler-333 c · Rocky Terrestrial Kepler-331 d · Super-Earth Kepler-267 d · Sub-Neptune

Host System: Kepler-169

Spectral Class

K-type orange

Effective Temperature

4,997 K — cooler than the Sun (5,778 K)

Estimated Age

0.79 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.763 R☉

Stellar Mass

0.825 M☉

Metallicity [Fe/H]

0.17

Extended Stellar Properties

Surface gravity (log g)

4.582 dex

Stellar density

1.980 g/cm³

Metallicity ratio

[Fe/H]

Distance

406.53 parsec

Light-years 1,325.92 ly

V-band magnitude

14.42 mag

Voyager-speed travel 23,382,575 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

2.431 mas

Total Proper Motion

11.727 mas/yr

PM Right Ascension

4.93 mas/yr

PM Declination

10.64 mas/yr

Galactic Cartesian (pc)

x = 0.208 · y = -0.726 · z = 0.655

Equatorial (J2000)

RA 285.99992° · Dec 40.91938°

Galactic ℓ, b

71.509° · 15.178°

Ecliptic λ, β

297.161° · 62.858°

HTM-20 index

1728370323