Key parameters at a glance

A radius of 11.90 Earth radii
A mass of 8,981.83 Earth masses
Surface gravity around 63.43 g
An orbital period of 663.870 days
Semi-major axis 2.0300 AU
Distance from Earth 199.36 light-years
Earth Similarity Index 0.251
Travel time at Voyager 1 speed 3,515,746 years

HD 6860 b Planet Profile

Physical Specs

Radius

11.90 R⊕

Radius (Jupiter)

1.060 R♃

Mass

8,981.83 M⊕

Mass (Jupiter)

28.260 M♃

Density

29.30 g/cm³

Surface Gravity

63.43 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.251

HZ Position Unknown

Controversial No

Discovery

Year 2023

Method Radial Velocity

Facility Bohyunsan Optical Astronomical Observatory

Telescope 1.8 m Telescope

Size rank in cohort

Rank by radius

#1526of 1771

top 86.1%

This planet

11.90R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

2MASS J22501512+2325342 b 11.90 R⊕ KMT-2020-BLG-0414L c 11.90 R⊕ DENIS-P J082303.1-491201 b 11.90 R⊕

Metric	Earth	HD 6860 b	Jupiter
Radius (R⊕)	1.00	11.90	11.21
Mass (M⊕)	1.00	8,981.83	317.83
Density (g/cm³)	5.51	29.30	1.33
Surface Gravity (g)	1.00	63.43	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	8,981.831 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 6860

HIP

HIP 5447

TIC

TIC 174500619

System

HD 6860

Percentile among Gas Giant cohort

Radius 11.900 R⊕ · percentile 13 / cohort 1771

Mass 8,981.831 M⊕ · percentile 100 / cohort 1747

Orbital period 663.87 d · percentile 72 / cohort 1533

Distance 61.12 pc · percentile 25 / cohort 1759

ESI 0.251 · percentile 45 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

663.870 days

Semi-major axis

2.0300 AU

Eccentricity

0.280

Inclination

— °

Year Length

A year here lasts about 1.82 Earth years on a mildly elliptical path at a mean orbital distance of 2.0300 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.251

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Lee et al. 2023

Instrument

BOES Echelle Spectrograph

Publication

2023-07

Observation locale

Ground

Discovery cohort

Planets confirmed in 2023 at Bohyunsan Optical Astronomical Observatory (3 shown).

HD 36384 b · Gas Giant HD 112300 b · Gas Giant HD 18438 b · Gas Giant

Host System: HD 6860

Spectral Class

M-type red dwarf

Effective Temperature

3,802 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

86.400 R☉

Stellar Mass

2.490 M☉

Metallicity [Fe/H]

-0.03

Extended Stellar Properties

Surface gravity (log g)

0.541 dex

Rotational v·sin i

6.00 km/s

Rotation period

7,900.00 days

Metallicity ratio

[Fe/H]

Distance

61.12 parsec

Light-years 199.36 ly

V-band magnitude

2.07 mag

Voyager-speed travel 3,515,746 yr

Multi-band Host Photometry — 10 bands

Astrometric Data

Parallax

16.360 mas

Total Proper Motion

208.614 mas/yr

PM Right Ascension

176.00 mas/yr

PM Declination

-112.00 mas/yr

Galactic Cartesian (pc)

x = 0.776 · y = 0.244 · z = 0.582

Equatorial (J2000)

RA 17.43298° · Dec 35.62050°

Galactic ℓ, b

127.108° · -27.103°

Ecliptic λ, β

30.401° · 25.943°

HTM-20 index

883275764

Similar Worlds

KMT-2024-BLG-0404L b

Gas Giant · M-type red dwarf

Radius 11.90 R⊕ · 23,515.8 ly

2MASS J22501512+2325342 b

Gas Giant · M-type red dwarf

Radius 11.90 R⊕ · 186.7 ly

TOI-5293 A b

Gas Giant · M-type red dwarf

Radius 11.90 R⊕ · 529.1 ly

GJ 1148 b

Gas Giant · M-type red dwarf

Radius 11.90 R⊕ · 35.9 ly

TOI-6034 b

Gas Giant · M-type red dwarf

Radius 11.92 R⊕ · 384.8 ly

G 196-3 b

Gas Giant · M-type red dwarf

Radius 12.00 R⊕ · 71.1 ly

Explore Related Categories

Gas Giant Planets Radial Velocity Discoveries Bohyunsan Optical Astronomical Observatory Mission M-type red dwarf Hosts