Key parameters at a glance

A radius of 5.67 Earth radii
A mass of 27.33 Earth masses
Surface gravity around 0.85 g
An orbital period of 65.784 days
Semi-major axis 0.2870 AU
Distance from Earth 73.48 light-years
Earth Similarity Index 0.441
Travel time at Voyager 1 speed 1,295,751 years

HD 127506 b Planet Profile

Physical Specs

Radius

5.67 R⊕

Radius (Jupiter)

0.506 R♃

Mass

27.33 M⊕

Mass (Jupiter)

0.086 M♃

Density

0.82 g/cm³

Surface Gravity

0.85 g (Earth)

Classification

Planet Type

Neptune-like

ESI Score 0.441

HZ Position Unknown

Controversial No

Discovery

Year 2022

Method Radial Velocity

Facility Multiple Observatories

Telescope Multiple Telescopes

Size rank in cohort

Rank by radius

#305of 574

top 53.0%

This planet

5.67R⊕

Neptune-like median

6.39R⊕

Nearest-size peers

K2-334 b 5.65 R⊕ TOI-1883 b 5.65 R⊕ DS Tuc A b 5.70 R⊕

Metric	Earth	HD 127506 b	Jupiter
Radius (R⊕)	1.00	5.67	11.21
Mass (M⊕)	1.00	27.33	317.83
Density (g/cm³)	5.51	0.82	1.33
Surface Gravity (g)	1.00	0.85	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	27.333 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 127506

HIP

HIP 70950

TIC

TIC 286992966

Gaia DR2

Gaia DR2 1480314599451475712

Gaia DR3

Gaia DR3 1480314599451475712

System

HIP 70950

Percentile among Neptune-like cohort

Radius 5.670 R⊕ · percentile 47 / cohort 574

Mass 27.333 M⊕ · percentile 46 / cohort 574

Orbital period 65.78 d · percentile 74 / cohort 524

Distance 22.53 pc · percentile 7 / cohort 572

ESI 0.441 · percentile 79 / cohort 574

Orbit & Habitability

Orbital Dynamics

Period

65.784 days

Semi-major axis

0.2870 AU

Eccentricity

0.240

Inclination

— °

Year Length

A year here lasts approximately 65.78 Earth days (18.0% of a terrestrial year) on a mildly elliptical path at a mean orbital distance of 0.2870 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.441

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 127506

Spectral Class

K-type orange

Effective Temperature

4,595 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

0.736 R☉

Stellar Mass

0.730 M☉

Metallicity [Fe/H]

-0.08

Extended Stellar Properties

Surface gravity (log g)

4.568 dex

Stellar density

2.584 g/cm³

Systemic radial velocity

-19.20 km/s

Rotational v·sin i

3.00 km/s

Metallicity ratio

[M/H]

Distance

22.53 parsec

Light-years 73.48 ly

V-band magnitude

8.70 mag

Voyager-speed travel 1,295,751 yr

Multi-band Host Photometry — 8 bands

Astrometric Data

Parallax

44.361 mas

Total Proper Motion

522.234 mas/yr

PM Right Ascension

-481.12 mas/yr

PM Declination

203.12 mas/yr

Galactic Cartesian (pc)

x = -0.645 · y = -0.498 · z = 0.580

Equatorial (J2000)

RA 217.68485° · Dec 35.45461°

Galactic ℓ, b

60.577° · 67.289°

Ecliptic λ, β

199.327° · 46.909°

HTM-20 index

1627684505

Similar Worlds

TOI-1410 c

Neptune-like · K-type orange

Radius 5.63 R⊕ · 237.3 ly

Kepler-951 b

Neptune-like · K-type orange

Radius 5.59 R⊕ · 1,247.6 ly

Kepler-1520 b

Neptune-like · K-type orange

Radius 5.77 R⊕ · 1,982.8 ly

TOI-532 b

Neptune-like · K-type orange

Radius 5.82 R⊕ · 440.5 ly

HD 103197 b

Neptune-like · K-type orange

Radius 5.83 R⊕ · 186.4 ly

Kepler-957 b

Neptune-like · K-type orange

Radius 5.50 R⊕ · 2,689.8 ly

Explore Related Categories

Neptune-like Planets Radial Velocity Discoveries Multiple Observatories Mission K-type orange Hosts