Key parameters at a glance

A radius of 1.88 Earth radii
A mass of 4.19 Earth masses
Surface gravity around 1.19 g
An orbital period of 13.563 days
Semi-major axis 0.1109 AU
Equilibrium temperature 733 K (460 °C)
Distance from Earth 5,137.71 light-years
Earth Similarity Index 0.384
Travel time at Voyager 1 speed 90,603,461 years

Kepler-1305 b Planet Profile

Physical Specs

Radius

1.88 R⊕

Radius (Jupiter)

0.168 R♃

Mass

4.19 M⊕

Mass (Jupiter)

0.013 M♃

Density

3.47 g/cm³

Surface Gravity

1.19 g (Earth)

Classification

Planet Type

Super-Earth

ESI Score 0.384

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

#153of 1176

top 12.9%

This planet

1.88R⊕

Super-Earth median

1.60R⊕

Nearest-size peers

Kepler-137 c 1.88 R⊕ Kepler-291 c 1.88 R⊕ Kepler-1644 b 1.88 R⊕

Metric	Earth	Kepler-1305 b	Jupiter
Radius (R⊕)	1.00	1.88	11.21
Mass (M⊕)	1.00	4.19	317.83
Density (g/cm³)	5.51	3.47	1.33
Surface Gravity (g)	1.00	1.19	2.53
Insolation (S⊕)	1.00	103.51	0.037

Star Catalogue Identifiers

TIC

TIC 273131845

Gaia DR2

Gaia DR2 2080269819302745216

Gaia DR3

Gaia DR3 2080269819302745216

System

Kepler-1305

Percentile among Super-Earth cohort

Radius 1.880 R⊕ · percentile 86 / cohort 1176

Mass 4.190 M⊕ · percentile 79 / cohort 1176

Orbital period 13.56 d · percentile 74 / cohort 1164

Distance 1,575.23 pc · percentile 96 / cohort 1171

ESI 0.384 · percentile 58 / cohort 1176

Orbit & Habitability

Orbital Dynamics

Period

13.563 days

Semi-major axis

0.1109 AU

Eccentricity

0.000

Inclination

87.13 °

Year Length

A year here lasts approximately 13.56 Earth days (3.7% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1109 AU.

Transit Fingerprint

Depth

0.034 %

Duration

5.632 h

Impact parameter b

0.751

Rp / R★

0.017944

Transit midpoint (BJD)

2,454,973.6532

Photometric dip

Transit produces a flux drop of 336 ppm lasting ≈ 5.63 h.

Extended Orbital Architecture

Planet / star radius ratio

0.017944

Semi-major axis / stellar radius

18.620

Impact parameter (b)

0.751

Transit mid-time (BJD)

2,454,973.6532

Angular separation (arcsec)

0.07040

Eq. Temperature

733K

(460 °C)

Insolation (S⊕)

103.51

Earth = 1.00

Earth Similarity (ESI)

0.384

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-1305

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,701 K — cooler than the Sun (5,778 K)

Estimated Age

4.37 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.960 R☉

Stellar Mass

0.970 M☉

Metallicity [Fe/H]

0.01

Extended Stellar Properties

Surface gravity (log g)

4.470 dex

Stellar density

0.664 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,575.23 parsec

Light-years 5,137.71 ly

V-band magnitude

15.83 mag

Voyager-speed travel 90,603,461 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.608 mas

Total Proper Motion

8.237 mas/yr

PM Right Ascension

2.98 mas/yr

PM Declination

-7.68 mas/yr

Galactic Cartesian (pc)

x = 0.317 · y = -0.613 · z = 0.724

Equatorial (J2000)

RA 297.33946° · Dec 46.34722°

Galactic ℓ, b

80.167° · 10.155°

Ecliptic λ, β

319.079° · 65.195°

HTM-20 index

-2140831795