Key parameters at a glance

A radius of 0.98 Earth radii
A mass of 0.90 Earth masses
Surface gravity around 0.94 g
An orbital period of 4.522 days
Semi-major axis 0.0520 AU
Equilibrium temperature 1,214 K (941 °C)
Distance from Earth 2,653.42 light-years
Earth Similarity Index 0.260
Travel time at Voyager 1 speed 46,793,047 years

Kepler-1328 b Planet Profile

Physical Specs

Radius

0.98 R⊕

Radius (Jupiter)

0.087 R♃

Mass

0.90 M⊕

Mass (Jupiter)

0.003 M♃

Density

5.28 g/cm³

Surface Gravity

0.94 g (Earth)

Classification

Planet Type

Rocky Terrestrial

ESI Score 0.260

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

#355of 570

top 62.1%

This planet

0.98R⊕

Rocky Terrestrial median

1.01R⊕

Nearest-size peers

Kepler-1990 c 0.98 R⊕ Kepler-220 d 0.98 R⊕ Kepler-1053 b 0.98 R⊕

Metric	Earth	Kepler-1328 b	Jupiter
Radius (R⊕)	1.00	0.98	11.21
Mass (M⊕)	1.00	0.90	317.83
Density (g/cm³)	5.51	5.28	1.33
Surface Gravity (g)	1.00	0.94	2.53
Insolation (S⊕)	1.00	545.67	0.037

Star Catalogue Identifiers

TIC

TIC 164778883

Gaia DR2

Gaia DR2 2106703212701656576

Gaia DR3

Gaia DR3 2106703212701656576

System

Kepler-1328

Percentile among Rocky Terrestrial cohort

Radius 0.980 R⊕ · percentile 37 / cohort 570

Mass 0.904 M⊕ · percentile 33 / cohort 570

Orbital period 4.52 d · percentile 50 / cohort 567

Distance 813.54 pc · percentile 86 / cohort 566

ESI 0.260 · percentile 27 / cohort 570

Orbit & Habitability

Orbital Dynamics

Period

4.522 days

Semi-major axis

0.0520 AU

Eccentricity

0.000

Inclination

88.82 °

Year Length

A year here lasts approximately 4.52 Earth days (1.2% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0520 AU.

Transit Fingerprint

Depth

0.011 %

Duration

3.490 h

Impact parameter b

0.203

Rp / R★

0.009444

Transit midpoint (BJD)

2,454,966.2166

Photometric dip

Transit produces a flux drop of 106 ppm lasting ≈ 3.49 h.

Extended Orbital Architecture

Planet / star radius ratio

0.009444

Semi-major axis / stellar radius

9.980

Impact parameter (b)

0.203

Transit mid-time (BJD)

2,454,966.2166

Angular separation (arcsec)

0.06390

Eq. Temperature

1,214K

(941 °C)

Insolation (S⊕)

545.67

Earth = 1.00

Earth Similarity (ESI)

0.260

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched.

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-1328

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,780 K — hotter than the Sun (5,778 K)

Estimated Age

4.57 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.990 R☉

Stellar Mass

1.000 M☉

Metallicity [Fe/H]

0.00

Extended Stellar Properties

Surface gravity (log g)

4.440 dex

Stellar density

0.440 g/cm³

Metallicity ratio

[Fe/H]

Distance

813.54 parsec

Light-years 2,653.42 ly

V-band magnitude

13.97 mag

Voyager-speed travel 46,793,047 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.200 mas

Total Proper Motion

7.762 mas/yr

PM Right Ascension

-1.07 mas/yr

PM Declination

-7.69 mas/yr

Galactic Cartesian (pc)

x = 0.181 · y = -0.691 · z = 0.700

Equatorial (J2000)

RA 284.67539° · Dec 44.41772°

Galactic ℓ, b

74.504° · 17.397°

Ecliptic λ, β

296.970° · 66.488°

HTM-20 index

990590235