Key parameters at a glance

A radius of 1.69 Earth radii
A mass of 3.50 Earth masses
Surface gravity around 1.22 g
An orbital period of 2.459 days
Semi-major axis 0.0350 AU
Distance from Earth 183.18 light-years
Earth Similarity Index 0.848
Travel time at Voyager 1 speed 3,230,361 years

1 sibling around HD 93351

HD 93351 b shares its host star with 1 other confirmed planet. Side-by-side measurements below.

Planet	Type	Radius (R⊕)	Mass (M⊕)	Period (d)	Eq. T (K)	Year
HD 93351 b this	Super-Earth	1.69	3.50	2.459	—	2022
HD 93351 c	Gas Giant	12.30	4,154.02	14,010.294	—	2022

HD 93351 b Planet Profile

Physical Specs

Radius

1.69 R⊕

Radius (Jupiter)

0.151 R♃

Mass

3.50 M⊕

Mass (Jupiter)

0.011 M♃

Density

3.98 g/cm³

Surface Gravity

1.22 g (Earth)

Classification

Planet Type

Super-Earth

ESI Score 0.848

HZ Position Unknown

Controversial No

Discovery

Year 2022

Method Radial Velocity

Facility Multiple Observatories

Telescope Multiple Telescopes

Size rank in cohort

Rank by radius

#415of 1176

top 35.2%

This planet

1.69R⊕

Super-Earth median

1.60R⊕

Nearest-size peers

Kepler-372 d 1.69 R⊕ Kepler-968 c 1.69 R⊕ Kepler-269 c 1.69 R⊕

Metric	Earth	HD 93351 b	Jupiter
Radius (R⊕)	1.00	1.69	11.21
Mass (M⊕)	1.00	3.50	317.83
Density (g/cm³)	5.51	3.98	1.33
Surface Gravity (g)	1.00	1.22	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	3.496 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 93351

TIC

TIC 318093199

Gaia DR2

Gaia DR2 3802693370192254336

Gaia DR3

Gaia DR3 3802693370192254336

System

HD 93351

Percentile among Super-Earth cohort

Radius 1.690 R⊕ · percentile 64 / cohort 1176

Mass 3.496 M⊕ · percentile 58 / cohort 1176

Orbital period 2.46 d · percentile 16 / cohort 1164

Distance 56.16 pc · percentile 12 / cohort 1171

ESI 0.848 · percentile 93 / cohort 1176

Orbit & Habitability

Orbital Dynamics

Period

2.459 days

Semi-major axis

0.0350 AU

Eccentricity

0.549

Inclination

— °

Year Length

A year here lasts approximately 2.46 Earth days (0.7% of a terrestrial year) on a highly eccentric trajectory at a mean orbital distance of 0.0350 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.848

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Feng et al. 2022

Instrument

Multiple Instruments

Publication

2022-09

Observation locale

Ground

Discovery cohort

Planets confirmed in 2022 at Multiple Observatories (12 shown).

Kepler-138 e · Rocky Terrestrial GJ 1002 b · Rocky Terrestrial GJ 2030 b · Sub-Neptune GJ 3929 c · Sub-Neptune HD 217786 c · Sub-Neptune GJ 1002 c · Rocky Terrestrial HD 155918 b · Sub-Neptune HD 213519 b · Sub-Neptune HD 191939 g · Sub-Neptune GJ 514 b · Sub-Neptune HD 12235 b · Sub-Neptune HD 18143 b · Sub-Neptune

Host System: HD 93351

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,408 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

0.911 R☉

Stellar Mass

0.940 M☉

Metallicity [Fe/H]

-0.23

Extended Stellar Properties

Surface gravity (log g)

4.492 dex

Stellar density

1.750 g/cm³

Metallicity ratio

[M/H]

Distance

56.16 parsec

Light-years 183.18 ly

V-band magnitude

9.12 mag

Voyager-speed travel 3,230,361 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

17.777 mas

Total Proper Motion

167.557 mas/yr

PM Right Ascension

88.05 mas/yr

PM Declination

-142.56 mas/yr

Galactic Cartesian (pc)

x = -0.949 · y = 0.314 · z = -0.029

Equatorial (J2000)

RA 161.67793° · Dec -1.68858°

Galactic ℓ, b

251.736° · 48.387°

Ecliptic λ, β

163.746° · -8.744°

HTM-20 index

-999538360