Key parameters at a glance

A radius of 12.10 Earth radii
A mass of 6,674.40 Earth masses
Surface gravity around 45.59 g
Semi-major axis 19,000.0000 AU
Distance from Earth 130.17 light-years
Earth Similarity Index 0.286
Travel time at Voyager 1 speed 2,295,464 years

UCAC4 328-061594 b Planet Profile

Physical Specs

Radius

12.10 R⊕

Radius (Jupiter)

1.080 R♃

Mass

6,674.40 M⊕

Mass (Jupiter)

21.000 M♃

Density

20.70 g/cm³

Surface Gravity

45.59 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.286

HZ Position Unknown

Controversial No

Discovery

Year 2024

Method Imaging

Facility Multiple Observatories

Telescope Multiple Telescopes

Size rank in cohort

Rank by radius

#1454of 1771

top 82.0%

This planet

12.10R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HD 62364 b 12.10 R⊕ HD 106515 A b 12.10 R⊕ BD+20 2457 b 12.10 R⊕

Metric	Earth	UCAC4 328-061594 b	Jupiter
Radius (R⊕)	1.00	12.10	11.21
Mass (M⊕)	1.00	6,674.40	317.83
Density (g/cm³)	5.51	20.70	1.33
Surface Gravity (g)	1.00	45.59	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	6,674.397 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

TIC

TIC 168071263

Gaia DR2

Gaia DR2 5473389537569200896

Gaia DR3

Gaia DR3 5473389537569200896

System

UCAC4 328-061594

Percentile among Gas Giant cohort

Radius 12.100 R⊕ · percentile 16 / cohort 1771

Mass 6,674.397 M⊕ · percentile 97 / cohort 1747

Distance 39.91 pc · percentile 14 / cohort 1759

ESI 0.286 · percentile 54 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

— days

Semi-major axis

19,000.0000 AU

Eccentricity

—

Inclination

— °

Year Length

Orbital period for this planet has not yet been measured.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.286

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Rothermich et al. 2024

Instrument

Multiple Instruments

Publication

2024-06

Observation locale

Ground

Discovery cohort

Planets confirmed in 2024 at Multiple Observatories (12 shown).

HD 134606 e · Super-Earth Kepler-51 e · Sub-Neptune HD 134606 f · Sub-Neptune HD 134606 b · Sub-Neptune Teegarden's Star d · Rocky Terrestrial HD 134606 c · Sub-Neptune HD 104067 c · Sub-Neptune GJ 1289 b · Sub-Neptune TOI-4562 c · Gas Giant HD 222237 b · Gas Giant CI Tau c · Gas Giant HD 75898 c · Gas Giant

Host System: UCAC4 328-061594

Spectral Class

Unknown

Effective Temperature

—

Estimated Age

0.40 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

—

Stellar Mass

1.190 M☉

Metallicity [Fe/H]

—

Distance

39.91 parsec

Light-years 130.17 ly

V-band magnitude

15.69 mag

Voyager-speed travel 2,295,464 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

25.028 mas

Total Proper Motion

125.237 mas/yr

PM Right Ascension

-113.14 mas/yr

PM Declination

-53.71 mas/yr

Galactic Cartesian (pc)

x = -0.809 · y = 0.418 · z = -0.414

Equatorial (J2000)

RA 152.69911° · Dec -24.45327°

Galactic ℓ, b

262.360° · 25.493°

Ecliptic λ, β

164.886° · -33.084°

HTM-20 index

23030430

Similar Worlds

KMT-2021-BLG-1770L b

Gas Giant · Unknown

Radius 12.10 R⊕ · 22,570.0 ly

ITG 15 b

Gas Giant · Unknown

Radius 12.10 R⊕ · 444.8 ly

KMT-2023-BLG-1743L b

Gas Giant · Unknown

Radius 12.10 R⊕ · 23,254.9 ly

KMT-2019-BLG-0335L b

Gas Giant · Unknown

Radius 12.10 R⊕ · 25,146.6 ly

KMT-2019-BLG-0297L b

Gas Giant · Unknown

Radius 12.10 R⊕ · 10,078.2 ly

KMT-2022-BLG-1013L b

Gas Giant · Unknown

Radius 12.10 R⊕ · 25,146.6 ly

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