Key parameters at a glance

A radius of 13.90 Earth radii
A mass of 284.77 Earth masses
Surface gravity around 1.47 g
An orbital period of 312.080 days
Semi-major axis 1.1170 AU
Distance from Earth 359.11 light-years
Earth Similarity Index 0.299
Travel time at Voyager 1 speed 6,332,861 years

HD 2952 b Planet Profile

Physical Specs

Radius

13.90 R⊕

Radius (Jupiter)

1.240 R♃

Mass

284.77 M⊕

Mass (Jupiter)

0.896 M♃

Density

0.58 g/cm³

Surface Gravity

1.47 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.299

HZ Position Unknown

Controversial No

Discovery

Year 2013

Method Radial Velocity

Facility Okayama Astrophysical Observatory

Telescope 1.88 m Telescope

Size rank in cohort

Rank by radius

#456of 1771

top 25.7%

This planet

13.90R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

24 Sex c 13.90 R⊕ HD 148156 b 13.90 R⊕ HD 134987 c 13.90 R⊕

Metric	Earth	HD 2952 b	Jupiter
Radius (R⊕)	1.00	13.90	11.21
Mass (M⊕)	1.00	284.77	317.83
Density (g/cm³)	5.51	0.58	1.33
Surface Gravity (g)	1.00	1.47	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	284.774 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 2952

HIP

HIP 2611

TIC

TIC 452910671

Gaia DR2

Gaia DR2 418206501834841600

Gaia DR3

Gaia DR3 418206501834841600

System

HD 2952

Percentile among Gas Giant cohort

Radius 13.900 R⊕ · percentile 72 / cohort 1771

Mass 284.774 M⊕ · percentile 31 / cohort 1747

Orbital period 312.08 d · percentile 61 / cohort 1533

Distance 110.10 pc · percentile 36 / cohort 1759

ESI 0.299 · percentile 58 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

312.080 days

Semi-major axis

1.1170 AU

Eccentricity

0.269

Inclination

— °

Year Length

A year here lasts approximately 312.08 Earth days (85.4% of a terrestrial year) on a mildly elliptical path at a mean orbital distance of 1.1170 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.299

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Sato et al. 2013

Instrument

HIDES Echelle Spectrograph

Publication

2013-08

Observation locale

Ground

Discovery cohort

Planets confirmed in 2013 at Okayama Astrophysical Observatory (2 shown).

HD 120084 b · Gas Giant ome Ser b · Gas Giant

Host System: HD 2952

Spectral Class

K-type orange

Effective Temperature

4,853 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

10.900 R☉

Stellar Mass

1.910 M☉

Metallicity [Fe/H]

0.00

Extended Stellar Properties

Surface gravity (log g)

2.650 dex

Systemic radial velocity

-34.86 km/s

Rotational v·sin i

1.92 km/s

Metallicity ratio

[Fe/H]

Distance

110.10 parsec

Light-years 359.11 ly

V-band magnitude

5.93 mag

Voyager-speed travel 6,332,861 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

9.054 mas

Total Proper Motion

80.331 mas/yr

PM Right Ascension

70.29 mas/yr

PM Declination

-38.88 mas/yr

Galactic Cartesian (pc)

x = 0.569 · y = 0.083 · z = 0.818

Equatorial (J2000)

RA 8.29384° · Dec 54.89482°

Galactic ℓ, b

120.283° · -7.883°

Ecliptic λ, β

35.203° · 45.856°

HTM-20 index

-2067336698

Similar Worlds

HIP 111909 c

Gas Giant · K-type orange

Radius 13.90 R⊕ · 287.3 ly

HIP 34222 b

Gas Giant · K-type orange

Radius 13.90 R⊕ · 74.5 ly

HD 128356 b

Gas Giant · K-type orange

Radius 13.90 R⊕ · 85.3 ly

HIP 65407 c

Gas Giant · K-type orange

Radius 13.90 R⊕ · 201.5 ly

24 Sex c

Gas Giant · K-type orange

Radius 13.90 R⊕ · 235.1 ly

7 CMa c

Gas Giant · K-type orange

Radius 13.90 R⊕ · 64.6 ly

Explore Related Categories

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