Key parameters at a glance

A radius of 12.10 Earth radii
A mass of 6,515.52 Earth masses
Surface gravity around 44.50 g
Semi-major axis 345.0000 AU
Equilibrium temperature 2,450 K (2177 °C)
Distance from Earth 475.53 light-years
Earth Similarity Index 0.045
Travel time at Voyager 1 speed 8,385,952 years

brightness_6

Circumbinary planet

HIP 79098 AB b orbits a binary-star pair rather than a single host — a minority architecture in the confirmed catalogue.

HIP 79098 AB b Planet Profile

Physical Specs

Radius

12.10 R⊕

Radius (Jupiter)

1.080 R♃

Mass

6,515.52 M⊕

Mass (Jupiter)

20.500 M♃

Density

20.20 g/cm³

Surface Gravity

44.50 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.045

HZ Position Unknown

Controversial No

Discovery

Year 2019

Method Imaging

Facility Paranal Observatory

Telescope 8.2 m ESO VLT UT3 Melipal Telescope

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	HIP 79098 AB b	Jupiter
Radius (R⊕)	1.00	12.10	11.21
Mass (M⊕)	1.00	6,515.52	317.83
Density (g/cm³)	5.51	20.20	1.33
Surface Gravity (g)	1.00	44.50	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	6,515.515 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

HD 144844

HIP

HIP 79098 AB

TIC

TIC 48908494

Gaia DR2

Gaia DR2 6242058872466158848

Gaia DR3

Gaia DR3 6242058872466158848

System

HIP 79098

Percentile among Gas Giant cohort

Radius 12.100 R⊕ · percentile 16 / cohort 1771

Mass 6,515.515 M⊕ · percentile 97 / cohort 1747

Distance 145.80 pc · percentile 44 / cohort 1759

ESI 0.045 · percentile 3 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

— days

Semi-major axis

345.0000 AU

Eccentricity

—

Inclination

— °

Year Length

Orbital period for this planet has not yet been measured.

Eq. Temperature

2,450K

(2177 °C)

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.045

0 = alien, 1 = Earth-identical

Insufficient insolation data — the dayside is scorched.

Detection Signatures

Astrometry

Positional wobble of the host star was measured.

Direct imaging

The planet has been imaged directly (rare).

Discovery Paper

Primary reference

Janson et al. 2019

Instrument

SPHERE

Publication

2019-06

Observation locale

Ground

Host System: HIP 79098 AB

Spectral Class

B-type blue-white

Effective Temperature

9,194 K — hotter than the Sun (5,778 K)

Estimated Age

0.01 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

—

Stellar Mass

3.750 M☉

Metallicity [Fe/H]

—

Distance

145.80 parsec

Light-years 475.53 ly

V-band magnitude

5.86 mag

Voyager-speed travel 8,385,952 yr

Multi-band Host Photometry — 12 bands

Astrometric Data

Parallax

6.834 mas

Total Proper Motion

29.785 mas/yr

PM Right Ascension

-9.82 mas/yr

PM Declination

-28.12 mas/yr

Galactic Cartesian (pc)

x = -0.427 · y = -0.810 · z = -0.402

Equatorial (J2000)

RA 242.18212° · Dec -23.68552°

Galactic ℓ, b

350.734° · 20.368°

Ecliptic λ, β

244.667° · -2.659°

HTM-20 index

265076243

Similar Worlds

HIP 77900 b

Gas Giant · B-type blue-white

Radius 12.10 R⊕ · 492.0 ly

HIP 78530 b

Gas Giant · B-type blue-white

Radius 12.00 R⊕ · 446.0 ly

kap And b

Gas Giant · B-type blue-white

Radius 12.30 R⊕ · 163.1 ly

mu2 Sco b

Gas Giant · B-type blue-white

Radius 12.30 R⊕ · —

b Cen AB b

Gas Giant · B-type blue-white

Radius 12.40 R⊕ · 319.9 ly

DP Leo b

Gas Giant · B-type blue-white

Radius 12.70 R⊕ · 997.0 ly

Explore Related Categories

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