Key parameters at a glance

A radius of 6.94 Earth radii
A mass of 38.46 Earth masses
Surface gravity around 0.80 g
An orbital period of 21.893 days
Semi-major axis 0.1600 AU
Distance from Earth 142.20 light-years
Earth Similarity Index 0.388
Travel time at Voyager 1 speed 2,507,779 years

1 sibling around HD 151450

HD 151450 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 151450 b this	Neptune-like	6.94	38.46	21.893	—	2022
HD 151450 c	Gas Giant	12.80	1,636.18	18,144.762	—	2022

HD 151450 b Planet Profile

Physical Specs

Radius

6.94 R⊕

Radius (Jupiter)

0.619 R♃

Mass

38.46 M⊕

Mass (Jupiter)

0.121 M♃

Density

0.63 g/cm³

Surface Gravity

0.80 g (Earth)

Classification

Planet Type

Neptune-like

ESI Score 0.388

HZ Position Unknown

Controversial No

Discovery

Year 2022

Method Radial Velocity

Facility Multiple Observatories

Telescope Multiple Telescopes

Size rank in cohort

Rank by radius

#208of 574

top 36.1%

This planet

6.94R⊕

Neptune-like median

6.39R⊕

Nearest-size peers

TOI-181 b 6.96 R⊕ Kepler-561 b 6.96 R⊕ Kepler-522 b 6.91 R⊕

Metric	Earth	HD 151450 b	Jupiter
Radius (R⊕)	1.00	6.94	11.21
Mass (M⊕)	1.00	38.46	317.83
Density (g/cm³)	5.51	0.63	1.33
Surface Gravity (g)	1.00	0.80	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	38.457 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 151450

TIC

TIC 12514017

Gaia DR2

Gaia DR2 4134094524223600640

Gaia DR3

Gaia DR3 4134094524223600640

System

HD 151450

Percentile among Neptune-like cohort

Radius 6.940 R⊕ · percentile 64 / cohort 574

Mass 38.457 M⊕ · percentile 61 / cohort 574

Orbital period 21.89 d · percentile 54 / cohort 524

Distance 43.60 pc · percentile 13 / cohort 572

ESI 0.388 · percentile 70 / cohort 574

Orbit & Habitability

Orbital Dynamics

Period

21.893 days

Semi-major axis

0.1600 AU

Eccentricity

0.496

Inclination

— °

Year Length

A year here lasts approximately 21.89 Earth days (6.0% of a terrestrial year) on a highly eccentric trajectory at a mean orbital distance of 0.1600 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.388

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 HD 93351 b · Super-Earth 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

Host System: HD 151450

Spectral Class

F-type yellow-white

Effective Temperature

6,092 K — hotter than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

1.172 R☉

Stellar Mass

1.140 M☉

Metallicity [Fe/H]

—

Distance

43.60 parsec

Light-years 142.20 ly

V-band magnitude

7.43 mag

Voyager-speed travel 2,507,779 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

22.907 mas

Total Proper Motion

119.597 mas/yr

PM Right Ascension

76.71 mas/yr

PM Declination

-91.76 mas/yr

Galactic Cartesian (pc)

x = -0.297 · y = -0.914 · z = -0.275

Equatorial (J2000)

RA 252.00801° · Dec -15.96435°

Galactic ℓ, b

3.295° · 18.263°

Ecliptic λ, β

252.609° · 6.396°

HTM-20 index

798550793