Key parameters at a glance

A radius of 0.51 Earth radii
A mass of 0.09 Earth masses
Surface gravity around 0.33 g
An orbital period of 0.681 days
Distance from Earth 4,184.74 light-years
Earth Similarity Index 0.753
Travel time at Voyager 1 speed 73,797,966 years

1 sibling around Kepler-1489

Kepler-1489 c shares its host star with 1 other confirmed planet. Side-by-side measurements below.

Planet	Type	Radius (R⊕)	Mass (M⊕)	Period (d)	Eq. T (K)	Year
Kepler-1489 c this	Rocky Terrestrial	0.51	0.09	0.681	—	2024
Kepler-1489 b	Super-Earth	1.77	3.78	82.295	400	2016

Kepler-1489 c Planet Profile

Physical Specs

Radius

0.51 R⊕

Radius (Jupiter)

0.046 R♃

Mass

0.09 M⊕

Mass (Jupiter)

0.000 M♃

Density

3.60 g/cm³

Surface Gravity

0.33 g (Earth)

Classification

Planet Type

Rocky Terrestrial

ESI Score 0.753

HZ Position Unknown

Controversial No

Discovery

Year 2024

Method Transit

Facility Kepler

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#560of 570

top 98.1%

This planet

0.51R⊕

Rocky Terrestrial median

1.01R⊕

Nearest-size peers

KOI-4777.01 0.51 R⊕ Kepler-1994 b 0.51 R⊕ Kepler-1308 b 0.52 R⊕

Metric	Earth	Kepler-1489 c	Jupiter
Radius (R⊕)	1.00	0.51	11.21
Mass (M⊕)	1.00	0.09	317.83
Density (g/cm³)	5.51	3.60	1.33
Surface Gravity (g)	1.00	0.33	2.53
Insolation (S⊕)	1.00	—	0.037

Star Catalogue Identifiers

TIC

TIC 123312978

Gaia DR2

Gaia DR2 2117323498594316544

Gaia DR3

Gaia DR3 2117323498594316544

System

Kepler-1489

Percentile among Rocky Terrestrial cohort

Radius 0.510 R⊕ · percentile 1 / cohort 570

Mass 0.087 M⊕ · percentile 1 / cohort 570

Orbital period 0.68 d · percentile 5 / cohort 567

Distance 1,283.05 pc · percentile 97 / cohort 566

ESI 0.753 · percentile 85 / cohort 570

Orbit & Habitability

Orbital Dynamics

Period

0.681 days

Semi-major axis

— AU

Eccentricity

—

Inclination

— °

Year Length

A year here lasts roughly 16.3 hours long.

Transit Fingerprint

Duration

1.700 h

Transit midpoint (BJD)

2,454,832.9600

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.753

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Wang et al. 2024

Instrument

Kepler CCD Array

Publication

2024-11

Observation locale

Space

Discovery cohort

Planets confirmed in 2024 at Kepler (4 shown).

KOI-4978 b · Rocky Terrestrial Kepler-963 c · Rocky Terrestrial Kepler-158 d · Rocky Terrestrial Kepler-879 c · Rocky Terrestrial

Host System: Kepler-1489

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,566 K — cooler than the Sun (5,778 K)

Estimated Age

4.07 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.957 R☉

Stellar Mass

0.977 M☉

Metallicity [Fe/H]

0.14

Extended Stellar Properties

Surface gravity (log g)

4.510 dex

Stellar density

1.600 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,283.05 parsec

Light-years 4,184.74 ly

V-band magnitude

14.98 mag

Voyager-speed travel 73,797,966 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.751 mas

Total Proper Motion

3.600 mas/yr

PM Right Ascension

-1.17 mas/yr

PM Declination

3.41 mas/yr

Galactic Cartesian (pc)

x = 0.140 · y = -0.700 · z = 0.700

Equatorial (J2000)

RA 281.29580° · Dec 44.46541°

Galactic ℓ, b

73.674° · 19.678°

Ecliptic λ, β

291.033° · 67.082°

HTM-20 index

-54448954