Key parameters at a glance

A radius of 12.30 Earth radii
A mass of 4,576.73 Earth masses
Surface gravity around 30.25 g
Semi-major axis 242.4000 AU
Earth Similarity Index 0.335

mu2 Sco b Planet Profile

Physical Specs

Radius

12.30 R⊕

Radius (Jupiter)

1.090 R♃

Mass

4,576.73 M⊕

Mass (Jupiter)

14.400 M♃

Density

13.50 g/cm³

Surface Gravity

30.25 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.335

HZ Position Unknown

Controversial No

Discovery

Year 2022

Method Imaging

Facility Paranal Observatory

Telescope 8.2 m ESO VLT UT3 Melipal Telescope

Size rank in cohort

Rank by radius

#1349of 1771

top 76.1%

This planet

12.30R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HAT-P-13 c 12.30 R⊕ HD 22781 b 12.30 R⊕ CHXR 73 b 12.30 R⊕

Metric	Earth	mu2 Sco b	Jupiter
Radius (R⊕)	1.00	12.30	11.21
Mass (M⊕)	1.00	4,576.73	317.83
Density (g/cm³)	5.51	13.50	1.33
Surface Gravity (g)	1.00	30.25	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	4,576.729 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

HD 151985

TIC

TIC 338105219

Gaia DR2

Gaia DR2 5971244451257058176

Gaia DR3

Gaia DR3 5971244451311982336

System

mu2 Sco

Percentile among Gas Giant cohort

Radius 12.300 R⊕ · percentile 22 / cohort 1771

Mass 4,576.729 M⊕ · percentile 93 / cohort 1747

ESI 0.335 · percentile 66 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

— days

Semi-major axis

242.4000 AU

Eccentricity

0.560

Inclination

96.60 °

Year Length

Orbital period for this planet has not yet been measured.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.335

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Squicciarini et al. 2022

Instrument

SPHERE

Publication

2022-05

Observation locale

Ground

Host System: mu2 Sco

Spectral Class

B-type blue-white

Effective Temperature

21,700 K — hotter than the Sun (5,778 K)

Estimated Age

0.02 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

5.600 R☉

Stellar Mass

9.100 M☉

Metallicity [Fe/H]

—

Extended Stellar Properties

Surface gravity (log g)

3.800 dex

Systemic radial velocity

1.30 km/s

Rotational v·sin i

52.00 km/s

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

6.310 mas

Total Proper Motion

26.297 mas/yr

PM Right Ascension

-11.60 mas/yr

PM Declination

-23.60 mas/yr

Galactic Cartesian (pc)

x = -0.229 · y = -0.754 · z = -0.616

Equatorial (J2000)

RA 253.08387° · Dec -38.01763°

Galactic ℓ, b

346.196° · 3.862°

Ecliptic λ, β

256.242° · -15.383°

HTM-20 index

718065369

Similar Worlds

kap And b

Gas Giant · B-type blue-white

Radius 12.30 R⊕ · 163.1 ly

b Cen AB b

Gas Giant · B-type blue-white

Radius 12.40 R⊕ · 319.9 ly

HIP 77900 b

Gas Giant · B-type blue-white

Radius 12.10 R⊕ · 492.0 ly

HIP 79098 AB b

Gas Giant · B-type blue-white

Radius 12.10 R⊕ · 475.5 ly

HIP 78530 b

Gas Giant · B-type blue-white

Radius 12.00 R⊕ · 446.0 ly

DP Leo b

Gas Giant · B-type blue-white

Radius 12.70 R⊕ · 997.0 ly

Explore Related Categories

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