Key parameters at a glance

A radius of 13.80 Earth radii
A mass of 308.29 Earth masses
Surface gravity around 1.62 g
An orbital period of 310.400 days
Semi-major axis 1.0800 AU
Distance from Earth 362.34 light-years
Earth Similarity Index 0.306
Travel time at Voyager 1 speed 6,389,804 years

HD 99283 b Planet Profile

Physical Specs

Radius

13.80 R⊕

Radius (Jupiter)

1.230 R♃

Mass

308.29 M⊕

Mass (Jupiter)

0.970 M♃

Density

0.65 g/cm³

Surface Gravity

1.62 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.306

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

#510of 1771

top 28.7%

This planet

13.80R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

GJ 179 b 13.80 R⊕ GJ 832 b 13.80 R⊕ HD 219415 b 13.80 R⊕

Metric	Earth	HD 99283 b	Jupiter
Radius (R⊕)	1.00	13.80	11.21
Mass (M⊕)	1.00	308.29	317.83
Density (g/cm³)	5.51	0.65	1.33
Surface Gravity (g)	1.00	1.62	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	308.294 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 99283

TIC

TIC 341687229

Gaia DR2

Gaia DR2 844058831415683712

Gaia DR3

Gaia DR3 844058831415683712

System

HD 99283

Percentile among Gas Giant cohort

Radius 13.800 R⊕ · percentile 70 / cohort 1771

Mass 308.294 M⊕ · percentile 34 / cohort 1747

Orbital period 310.40 d · percentile 61 / cohort 1533

Distance 111.09 pc · percentile 36 / cohort 1759

ESI 0.306 · percentile 60 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

310.400 days

Semi-major axis

1.0800 AU

Eccentricity

0.200

Inclination

— °

Year Length

A year here lasts approximately 310.40 Earth days (85.0% of a terrestrial year) on a mildly elliptical path at a mean orbital distance of 1.0800 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.306

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 219139 b · Gas Giant HD 360 b · Gas Giant HD 79181 b · Gas Giant HD 161178 b · Gas Giant ups Leo b · Gas Giant HD 10975 b · Gas Giant

Host System: HD 99283

Spectral Class

K-type orange

Effective Temperature

4,886 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

11.210 R☉

Stellar Mass

1.760 M☉

Metallicity [Fe/H]

-0.16

Extended Stellar Properties

Surface gravity (log g)

2.570 dex

Rotational v·sin i

1.87 km/s

Metallicity ratio

[Fe/H]

Distance

111.09 parsec

Light-years 362.34 ly

V-band magnitude

5.73 mag

Voyager-speed travel 6,389,804 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

8.973 mas

Total Proper Motion

86.403 mas/yr

PM Right Ascension

-71.76 mas/yr

PM Declination

48.13 mas/yr

Galactic Cartesian (pc)

x = -0.555 · y = 0.083 · z = 0.828

Equatorial (J2000)

RA 171.48741° · Dec 55.85067°

Galactic ℓ, b

145.257° · 57.416°

Ecliptic λ, β

143.856° · 46.572°

HTM-20 index

-1108638114

Similar Worlds

HD 285507 b

Gas Giant · K-type orange

Radius 13.80 R⊕ · 146.9 ly

HD 216536 b

Gas Giant · K-type orange

Radius 13.80 R⊕ · 1,227.1 ly

OGLE-2014-BLG-1760L b

Gas Giant · K-type orange

Radius 13.80 R⊕ · 23,013.6 ly

Kepler-48 f

Gas Giant · K-type orange

Radius 13.80 R⊕ · 1,000.4 ly

HD 113538 c

Gas Giant · K-type orange

Radius 13.80 R⊕ · 53.1 ly

HD 1605 b

Gas Giant · K-type orange

Radius 13.80 R⊕ · 289.6 ly

Explore Related Categories

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