Key parameters at a glance

A radius of 12.00 Earth radii
A mass of 7,300.00 Earth masses
Surface gravity around 50.69 g
Semi-major axis 740.0000 AU
Equilibrium temperature 2,700 K (2427 °C)
Distance from Earth 446.05 light-years
Earth Similarity Index 0.038
Travel time at Voyager 1 speed 7,866,050 years

HIP 78530 b Planet Profile

Physical Specs

Radius

12.00 R⊕

Radius (Jupiter)

1.070 R♃

Mass

7,300.00 M⊕

Mass (Jupiter)

23.000 M♃

Density

23.20 g/cm³

Surface Gravity

50.69 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.038

HZ Position Unknown

Controversial No

Discovery

Year 2010

Method Imaging

Facility Gemini Observatory

Telescope 8.19 m Gemini North Telescope

Size rank in cohort

Rank by radius

#1494of 1771

top 84.3%

This planet

12.00R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

TOI-3757 b 12.00 R⊕ HD 80913 b 12.00 R⊕ HD 221420 b 12.00 R⊕

Metric	Earth	HIP 78530 b	Jupiter
Radius (R⊕)	1.00	12.00	11.21
Mass (M⊕)	1.00	7,300.00	317.83
Density (g/cm³)	5.51	23.20	1.33
Surface Gravity (g)	1.00	50.69	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	7,300.000 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

HD 143567

HIP

HIP 78530

TIC

TIC 1259690584

Gaia DR2

Gaia DR2 6243537406369453824

Gaia DR3

Gaia DR3 6243537406369453824

System

HIP 78530

Percentile among Gas Giant cohort

Radius 12.000 R⊕ · percentile 15 / cohort 1771

Mass 7,300.000 M⊕ · percentile 98 / cohort 1747

Distance 136.76 pc · percentile 42 / cohort 1759

ESI 0.038 · percentile 1 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

— days

Semi-major axis

740.0000 AU

Eccentricity

—

Inclination

— °

Year Length

Orbital period for this planet has not yet been measured.

Eq. Temperature

2,700K

(2427 °C)

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.038

0 = alien, 1 = Earth-identical

Insufficient insolation data — the dayside is scorched.

Discovery Paper

Primary reference

Lafreniere et al. 2011

Instrument

NIRI Camera

Publication

2011-03

Observation locale

Ground

Host System: HIP 78530

Spectral Class

B-type blue-white

Effective Temperature

10,500 K — hotter than the Sun (5,778 K)

Estimated Age

0.01 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

2.109 R☉

Stellar Mass

2.500 M☉

Metallicity [Fe/H]

-0.50

Extended Stellar Properties

Surface gravity (log g)

4.131 dex

Stellar density

0.330 g/cm³

Rotational v·sin i

144.74 km/s

Metallicity ratio

[Fe/H]

Distance

136.76 parsec

Light-years 446.05 ly

V-band magnitude

7.17 mag

Voyager-speed travel 7,866,050 yr

Multi-band Host Photometry — 10 bands

Astrometric Data

Parallax

7.285 mas

Total Proper Motion

26.939 mas/yr

PM Right Ascension

-12.01 mas/yr

PM Declination

-24.11 mas/yr

Galactic Cartesian (pc)

x = -0.457 · y = -0.807 · z = -0.374

Equatorial (J2000)

RA 240.48101° · Dec -21.98049°

Galactic ℓ, b

350.871° · 22.681°

Ecliptic λ, β

242.802° · -1.285°

HTM-20 index

286054511

Similar Worlds

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

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

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