Key parameters at a glance

A radius of 6.90 Earth radii
A mass of 38.14 Earth masses
Surface gravity around 0.80 g
An orbital period of 41.832 days
Semi-major axis 0.2420 AU
Distance from Earth 160.36 light-years
Earth Similarity Index 0.390
Travel time at Voyager 1 speed 2,827,916 years

1 sibling around HD 25912

HD 25912 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 25912 b this	Neptune-like	6.90	38.14	41.832	—	2022
HD 25912 c	Gas Giant	12.20	5,252.75	26,308.656	—	2022

HD 25912 b Planet Profile

Physical Specs

Radius

6.90 R⊕

Radius (Jupiter)

0.616 R♃

Mass

38.14 M⊕

Mass (Jupiter)

0.120 M♃

Density

0.64 g/cm³

Surface Gravity

0.80 g (Earth)

Classification

Planet Type

Neptune-like

ESI Score 0.390

HZ Position Unknown

Controversial No

Discovery

Year 2022

Method Radial Velocity

Facility Multiple Observatories

Telescope Multiple Telescopes

Size rank in cohort

Rank by radius

#211of 574

top 36.6%

This planet

6.90R⊕

Neptune-like median

6.39R⊕

Nearest-size peers

KIC 3558849 b 6.90 R⊕ KMT-2021-BLG-1554L b 6.90 R⊕ Kepler-522 b 6.91 R⊕

Metric	Earth	HD 25912 b	Jupiter
Radius (R⊕)	1.00	6.90	11.21
Mass (M⊕)	1.00	38.14	317.83
Density (g/cm³)	5.51	0.64	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)	38.139 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 25912

TIC

TIC 237356930

Gaia DR2

Gaia DR2 4828528063821835648

Gaia DR3

Gaia DR3 4828528063821835648

System

HD 25912

Percentile among Neptune-like cohort

Radius 6.900 R⊕ · percentile 63 / cohort 574

Mass 38.139 M⊕ · percentile 60 / cohort 574

Orbital period 41.83 d · percentile 67 / cohort 524

Distance 49.17 pc · percentile 16 / cohort 572

ESI 0.390 · percentile 71 / cohort 574

Orbit & Habitability

Orbital Dynamics

Period

41.832 days

Semi-major axis

0.2420 AU

Eccentricity

0.050

Inclination

— °

Year Length

A year here lasts approximately 41.83 Earth days (11.5% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.2420 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.390

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 25912

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,921 K — hotter than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

0.996 R☉

Stellar Mass

1.080 M☉

Metallicity [Fe/H]

0.12

Extended Stellar Properties

Surface gravity (log g)

4.475 dex

Stellar density

1.542 g/cm³

Metallicity ratio

[M/H]

Distance

49.17 parsec

Light-years 160.36 ly

V-band magnitude

8.20 mag

Voyager-speed travel 2,827,916 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

20.310 mas

Total Proper Motion

169.348 mas/yr

PM Right Ascension

-68.61 mas/yr

PM Declination

-154.83 mas/yr

Galactic Cartesian (pc)

x = 0.300 · y = 0.539 · z = -0.787

Equatorial (J2000)

RA 60.90750° · Dec -51.93151°

Galactic ℓ, b

261.122° · -46.539°

Ecliptic λ, β

31.143° · -69.494°

HTM-20 index

-1322754940