Key parameters at a glance

A radius of 2.86 Earth radii
A mass of 8.55 Earth masses
Surface gravity around 1.05 g
An orbital period of 33.879 days
Semi-major axis 0.2004 AU
Equilibrium temperature 564 K (291 °C)
Distance from Earth 3,174.70 light-years
Earth Similarity Index 0.422
Travel time at Voyager 1 speed 55,985,798 years

Kepler-1325 b Planet Profile

Physical Specs

Radius

2.86 R⊕

Radius (Jupiter)

0.255 R♃

Mass

8.55 M⊕

Mass (Jupiter)

0.027 M♃

Density

2.01 g/cm³

Surface Gravity

1.05 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.422

HZ Position Inner

Controversial No

Discovery

Year 2016

Method Transit

Facility Kepler

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#671of 1978

top 33.9%

This planet

2.86R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-58 c 2.86 R⊕ Kepler-142 c 2.86 R⊕ Kepler-170 c 2.86 R⊕

Metric	Earth	Kepler-1325 b	Jupiter
Radius (R⊕)	1.00	2.86	11.21
Mass (M⊕)	1.00	8.55	317.83
Density (g/cm³)	5.51	2.01	1.33
Surface Gravity (g)	1.00	1.05	2.53
Insolation (S⊕)	1.00	18.15	0.037

Star Catalogue Identifiers

TIC

TIC 164828023

Gaia DR2

Gaia DR2 2104094209049086976

Gaia DR3

Gaia DR3 2104094209049086976

System

Kepler-1325

Percentile among Sub-Neptune cohort

Radius 2.860 R⊕ · percentile 66 / cohort 1978

Mass 8.550 M⊕ · percentile 60 / cohort 1978

Orbital period 33.88 d · percentile 76 / cohort 1946

Distance 973.37 pc · percentile 76 / cohort 1975

ESI 0.422 · percentile 57 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

33.879 days

Semi-major axis

0.2004 AU

Eccentricity

0.000

Inclination

87.23 °

Year Length

A year here lasts approximately 33.88 Earth days (9.3% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.2004 AU.

Transit Fingerprint

Depth

0.070 %

Duration

5.811 h

Impact parameter b

0.873

Rp / R★

0.028680

Transit midpoint (BJD)

2,454,993.2178

Photometric dip

Transit produces a flux drop of 700 ppm lasting ≈ 5.81 h.

Extended Orbital Architecture

Planet / star radius ratio

0.028680

Semi-major axis / stellar radius

19.100

Impact parameter (b)

0.873

Transit mid-time (BJD)

2,454,993.2178

Angular separation (arcsec)

0.20600

Eq. Temperature

564K

(291 °C)

Insolation (S⊕)

18.15

Earth = 1.00

Earth Similarity (ESI)

0.422

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

Morton et al. 2016

Instrument

Kepler CCD Array

Publication

2016-05

Observation locale

Space

Discovery cohort

Planets confirmed in 2016 at Kepler (12 shown).

Kepler-1512 b · Rocky Terrestrial Kepler-1410 b · Super-Earth Kepler-560 b · Super-Earth Kepler-1389 b · Super-Earth Kepler-1450 b · Super-Earth Kepler-1544 b · Super-Earth Kepler-1459 b · Super-Earth Kepler-1638 b · Super-Earth Kepler-737 b · Super-Earth Kepler-1185 b · Super-Earth Kepler-1178 b · Rocky Terrestrial Kepler-1040 b · Sub-Neptune

Host System: Kepler-1325

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,550 K — cooler than the Sun (5,778 K)

Estimated Age

4.79 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

0.910 R☉

Stellar Mass

0.930 M☉

Metallicity [Fe/H]

0.01

Extended Stellar Properties

Surface gravity (log g)

4.500 dex

Stellar density

0.115 g/cm³

Metallicity ratio

[Fe/H]

Distance

973.37 parsec

Light-years 3,174.70 ly

V-band magnitude

15.31 mag

Voyager-speed travel 55,985,798 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.999 mas

Total Proper Motion

15.847 mas/yr

PM Right Ascension

-11.74 mas/yr

PM Declination

-10.64 mas/yr

Galactic Cartesian (pc)

x = 0.192 · y = -0.717 · z = 0.670

Equatorial (J2000)

RA 285.01715° · Dec 42.08531°

Galactic ℓ, b

72.335° · 16.305°

Ecliptic λ, β

296.182° · 64.166°

HTM-20 index

2035036409