Key parameters at a glance

A radius of 5.91 Earth radii
A mass of 29.29 Earth masses
Surface gravity around 0.84 g
An orbital period of 1,291.565 days
Semi-major axis 2.3928 AU
Distance from Earth 78.32 light-years
Earth Similarity Index 0.430
Travel time at Voyager 1 speed 1,381,142 years

1 sibling around HD 134060

HD 134060 c 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 134060 b	Sub-Neptune	3.16	10.10	3.270	—	2019
HD 134060 c this	Neptune-like	5.91	29.29	1,291.565	—	2019

HD 134060 c Planet Profile

Physical Specs

Radius

5.91 R⊕

Radius (Jupiter)

0.527 R♃

Mass

29.29 M⊕

Mass (Jupiter)

0.092 M♃

Density

0.78 g/cm³

Surface Gravity

0.84 g (Earth)

Classification

Planet Type

Neptune-like

ESI Score 0.430

HZ Position Unknown

Controversial No

Discovery

Year 2019

Method Radial Velocity

Facility La Silla Observatory

Telescope 3.6 m ESO Telescope

Size rank in cohort

Rank by radius

#295of 574

top 51.2%

This planet

5.91R⊕

Neptune-like median

6.39R⊕

Nearest-size peers

Kepler-1755 b 5.92 R⊕ GJ 163 d 5.92 R⊕ TOI-4010 c 5.93 R⊕

Metric	Earth	HD 134060 c	Jupiter
Radius (R⊕)	1.00	5.91	11.21
Mass (M⊕)	1.00	29.29	317.83
Density (g/cm³)	5.51	0.78	1.33
Surface Gravity (g)	1.00	0.84	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	29.290 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 134060

HIP

HIP 74273

TIC

TIC 454901855

Gaia DR2

Gaia DR2 5876112300125320448

Gaia DR3

Gaia DR3 5876112300125320448

System

HD 134060

Percentile among Neptune-like cohort

Radius 5.910 R⊕ · percentile 49 / cohort 574

Mass 29.290 M⊕ · percentile 48 / cohort 574

Orbital period 1,291.56 d · percentile 99 / cohort 524

Distance 24.01 pc · percentile 8 / cohort 572

ESI 0.430 · percentile 78 / cohort 574

Orbit & Habitability

Orbital Dynamics

Period

1,291.565 days

Semi-major axis

2.3928 AU

Eccentricity

0.110

Inclination

— °

Year Length

A year here lasts about 3.54 Earth years on a mildly elliptical path at a mean orbital distance of 2.3928 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.430

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Udry et al. 2019

Instrument

HARPS Spectrograph

Publication

2019-02

Observation locale

Ground

Discovery cohort

Planets confirmed in 2019 at La Silla Observatory (12 shown).

HD 20781 b · Rocky Terrestrial HD 20781 c · Sub-Neptune HD 21693 b · Sub-Neptune HD 45184 c · Sub-Neptune HD 134060 b · Sub-Neptune HD 31527 b · Sub-Neptune HD 20781 d · Sub-Neptune HD 20003 b · Sub-Neptune HD 31527 d · Sub-Neptune HD 45184 b · Sub-Neptune HD 51608 b · Sub-Neptune HD 136352 d · Sub-Neptune

Host System: HD 134060

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,966 K — hotter than the Sun (5,778 K)

Estimated Age

5.60 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

1.164 R☉

Stellar Mass

1.095 M☉

Metallicity [Fe/H]

0.14

Extended Stellar Properties

Surface gravity (log g)

4.430 dex

Stellar density

1.016 g/cm³

Systemic radial velocity

37.40 km/s

Rotational v·sin i

2.60 km/s

Rotation period

23.00 days

Activity index (log R'HK)

-4.950

Metallicity ratio

[Fe/H]

Distance

24.01 parsec

Light-years 78.32 ly

V-band magnitude

6.29 mag

Voyager-speed travel 1,381,142 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

41.616 mas

Total Proper Motion

185.981 mas/yr

PM Right Ascension

-185.59 mas/yr

PM Declination

-12.09 mas/yr

Galactic Cartesian (pc)

x = -0.322 · y = -0.354 · z = -0.878

Equatorial (J2000)

RA 227.68476° · Dec -61.42237°

Galactic ℓ, b

318.806° · -2.921°

Ecliptic λ, β

244.453° · -41.683°

HTM-20 index

-494281336