Key parameters at a glance

A radius of 12.50 Earth radii
A mass of 2,860.46 Earth masses
Surface gravity around 18.31 g
Semi-major axis 93.9000 AU
Distance from Earth 528.79 light-years
Earth Similarity Index 0.397
Travel time at Voyager 1 speed 9,325,157 years

AB Aur b Planet Profile

Physical Specs

Radius

12.50 R⊕

Radius (Jupiter)

1.120 R♃

Mass

2,860.46 M⊕

Mass (Jupiter)

9.000 M♃

Density

8.05 g/cm³

Surface Gravity

18.31 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.397

HZ Position Unknown

Controversial No

Discovery

Year 2022

Method Imaging

Facility Subaru Telescope

Telescope 8.2 m Subaru Telescope

Size rank in cohort

Rank by radius

#1235of 1771

top 69.7%

This planet

12.50R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HD 156279 c 12.50 R⊕ HD 33283 b 12.50 R⊕ HD 156279 b 12.50 R⊕

Metric	Earth	AB Aur b	Jupiter
Radius (R⊕)	1.00	12.50	11.21
Mass (M⊕)	1.00	2,860.46	317.83
Density (g/cm³)	5.51	8.05	1.33
Surface Gravity (g)	1.00	18.31	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	2,860.456 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

TIC

TIC 96680681

Gaia DR2

Gaia DR2 156917493449670656

Gaia DR3

Gaia DR3 156917493449670656

System

AB Aur

Percentile among Gas Giant cohort

Radius 12.500 R⊕ · percentile 28 / cohort 1771

Mass 2,860.456 M⊕ · percentile 86 / cohort 1747

Distance 162.13 pc · percentile 46 / cohort 1759

ESI 0.397 · percentile 85 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

— days

Semi-major axis

93.9000 AU

Eccentricity

0.400

Inclination

42.60 °

Year Length

Orbital period for this planet has not yet been measured.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.397

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Currie et al. 2022

Instrument

Subaru Coronagraphic Extreme Adaptive Optics (SCExAO)

Publication

2022-04

Observation locale

Ground

Host System: AB Aur

Spectral Class

A-type white

Effective Temperature

9,770 K — hotter than the Sun (5,778 K)

Estimated Age

0.00 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

2.959 R☉

Stellar Mass

2.400 M☉

Metallicity [Fe/H]

—

Distance

162.13 parsec

Light-years 528.79 ly

V-band magnitude

7.08 mag

Voyager-speed travel 9,325,157 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

6.140 mas

Total Proper Motion

24.429 mas/yr

PM Right Ascension

3.93 mas/yr

PM Declination

-24.11 mas/yr

Galactic Cartesian (pc)

x = 0.238 · y = 0.828 · z = 0.508

Equatorial (J2000)

RA 73.94104° · Dec 30.55109°

Galactic ℓ, b

172.499° · -7.981°

Ecliptic λ, β

76.080° · 7.884°

HTM-20 index

-1427851596

Similar Worlds

bet Pic c

Gas Giant · A-type white

Radius 12.50 R⊕ · 64.4 ly

WD 0806-661 b

Gas Giant · A-type white

Radius 12.60 R⊕ · 62.8 ly

KIC 7917485 b

Gas Giant · A-type white

Radius 12.40 R⊕ · 4,510.4 ly

HIP 99770 b

Gas Giant · A-type white

Radius 12.20 R⊕ · 130.7 ly

HIP 54515 b

Gas Giant · A-type white

Radius 12.20 R⊕ · 270.1 ly

HD 95086 b

Gas Giant · A-type white

Radius 12.90 R⊕ · 281.2 ly

Explore Related Categories

Gas Giant Planets Imaging Discoveries Subaru Telescope Mission A-type white Hosts