Key parameters at a glance

A radius of 14.30 Earth radii
A mass of 143.02 Earth masses
Surface gravity around 0.70 g
An orbital period of 283.800 days
Semi-major axis 0.9500 AU
Distance from Earth 379.99 light-years
Earth Similarity Index 0.246
Travel time at Voyager 1 speed 6,701,146 years

HD 10975 b Planet Profile

Physical Specs

Radius

14.30 R⊕

Radius (Jupiter)

1.280 R♃

Mass

143.02 M⊕

Mass (Jupiter)

0.450 M♃

Density

0.27 g/cm³

Surface Gravity

0.70 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.246

HZ Position Unknown

Controversial No

Discovery

Year 2021

Method Radial Velocity

Facility Okayama Astrophysical Observatory

Telescope 1.88 m Telescope

Size rank in cohort

Rank by radius

#301of 1771

top 16.9%

This planet

14.30R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HIP 65407 b 14.30 R⊕ HD 30669 b 14.30 R⊕ HD 45652 b 14.30 R⊕

Metric	Earth	HD 10975 b	Jupiter
Radius (R⊕)	1.00	14.30	11.21
Mass (M⊕)	1.00	143.02	317.83
Density (g/cm³)	5.51	0.27	1.33
Surface Gravity (g)	1.00	0.70	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	143.023 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 10975

TIC

TIC 28763463

Gaia DR2

Gaia DR2 343449606741529728

Gaia DR3

Gaia DR3 343449606741529728

System

HD 10975

Percentile among Gas Giant cohort

Radius 14.300 R⊕ · percentile 82 / cohort 1771

Mass 143.023 M⊕ · percentile 11 / cohort 1747

Orbital period 283.80 d · percentile 60 / cohort 1533

Distance 116.51 pc · percentile 38 / cohort 1759

ESI 0.246 · percentile 43 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

283.800 days

Semi-major axis

0.9500 AU

Eccentricity

0.442

Inclination

— °

Year Length

A year here lasts approximately 283.80 Earth days (77.7% of a terrestrial year) on a highly eccentric trajectory at a mean orbital distance of 0.9500 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.246

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Teng et al. 2021

Instrument

HIDES Echelle Spectrograph

Publication

2021-12

Observation locale

Ground

Discovery cohort

Planets confirmed in 2021 at Okayama Astrophysical Observatory (7 shown).

gam Psc b · Gas Giant HD 99283 b · Gas Giant HD 219139 b · Gas Giant HD 360 b · Gas Giant HD 79181 b · Gas Giant HD 161178 b · Gas Giant ups Leo b · Gas Giant

Host System: HD 10975

Spectral Class

K-type orange

Effective Temperature

4,840 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

11.160 R☉

Stellar Mass

1.410 M☉

Metallicity [Fe/H]

-0.21

Extended Stellar Properties

Surface gravity (log g)

2.480 dex

Rotational v·sin i

1.69 km/s

Metallicity ratio

[Fe/H]

Distance

116.51 parsec

Light-years 379.99 ly

V-band magnitude

5.94 mag

Voyager-speed travel 6,701,146 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

8.555 mas

Total Proper Motion

115.641 mas/yr

PM Right Ascension

112.46 mas/yr

PM Declination

-26.93 mas/yr

Galactic Cartesian (pc)

x = 0.702 · y = 0.360 · z = 0.615

Equatorial (J2000)

RA 27.16280° · Dec 37.95275°

Galactic ℓ, b

135.201° · -23.552°

Ecliptic λ, β

39.330° · 24.902°

HTM-20 index

1709889461

Similar Worlds

HD 184010 d

Gas Giant · K-type orange

Radius 14.30 R⊕ · 198.3 ly

HD 330075 b

Gas Giant · K-type orange

Radius 14.30 R⊕ · 147.7 ly

HD 141399 b

Gas Giant · K-type orange

Radius 14.30 R⊕ · 120.7 ly

HIP 65407 b

Gas Giant · K-type orange

Radius 14.30 R⊕ · 201.5 ly

HD 2638 b

Gas Giant · K-type orange

Radius 14.30 R⊕ · 179.3 ly

WASP-52 b

Gas Giant · K-type orange

Radius 14.24 R⊕ · 570.2 ly

Explore Related Categories

Gas Giant Planets Radial Velocity Discoveries Okayama Astrophysical Observatory Mission K-type orange Hosts