Key parameters at a glance

A radius of 3.77 Earth radii
A mass of 13.63 Earth masses
Surface gravity around 0.96 g
An orbital period of 15.508 days
Semi-major axis 0.1238 AU
Distance from Earth 38.53 light-years
Earth Similarity Index 0.563
Travel time at Voyager 1 speed 679,559 years

HD 141004 b Planet Profile

Physical Specs

Radius

3.77 R⊕

Radius (Jupiter)

0.336 R♃

Mass

13.63 M⊕

Mass (Jupiter)

0.043 M♃

Density

1.40 g/cm³

Surface Gravity

0.96 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.563

HZ Position Unknown

Controversial No

Discovery

Year 2021

Method Radial Velocity

Facility Multiple Observatories

Telescope Multiple Telescopes

Size rank in cohort

Rank by radius

#63of 1978

top 3.1%

This planet

3.77R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

GJ 720 A b 3.77 R⊕ Kepler-315 b 3.77 R⊕ K2-276 b 3.77 R⊕

Metric	Earth	HD 141004 b	Jupiter
Radius (R⊕)	1.00	3.77	11.21
Mass (M⊕)	1.00	13.63	317.83
Density (g/cm³)	5.51	1.40	1.33
Surface Gravity (g)	1.00	0.96	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	13.635 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 141004

HIP

HIP 77257

TIC

TIC 296740796

Gaia DR2

Gaia DR2 4430238051199001216

Gaia DR3

Gaia DR3 4430238051199001216

System

HD 141004

Percentile among Sub-Neptune cohort

Radius 3.770 R⊕ · percentile 97 / cohort 1978

Mass 13.635 M⊕ · percentile 90 / cohort 1978

Orbital period 15.51 d · percentile 51 / cohort 1946

Distance 11.81 pc · percentile 2 / cohort 1975

ESI 0.563 · percentile 78 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

15.508 days

Semi-major axis

0.1238 AU

Eccentricity

0.160

Inclination

— °

Year Length

A year here lasts approximately 15.51 Earth days (4.2% of a terrestrial year) on a mildly elliptical path at a mean orbital distance of 0.1238 AU.

Extended Orbital Architecture

RV semi-amplitude (K)

3.450 m/s

Transit mid-time (BJD)

2,456,704.3300

Long. of periastron (ω)

19.48°

Angular separation (arcsec)

10.50000

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.563

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Rosenthal et al. 2021

Instrument

Multiple Instruments

Publication

2021-07

Observation locale

Ground

Discovery cohort

Planets confirmed in 2021 at Multiple Observatories (12 shown).

L 98-59 e · Super-Earth GJ 393 b · Rocky Terrestrial HD 168009 b · Sub-Neptune HD 164922 e · Sub-Neptune HD 95735 c · Sub-Neptune HD 107148 c · Neptune-like TOI-178 f · Sub-Neptune TYC 0434-04538-1 b · Gas Giant HIP 56640 b · Gas Giant HD 137496 c · Gas Giant HD 156668 c · Neptune-like HD 145675 c · Gas Giant

Host System: HD 141004

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,885 K — hotter than the Sun (5,778 K)

Estimated Age

6.32 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

1.389 R☉

Stellar Mass

1.052 M☉

Metallicity [Fe/H]

0.02

Extended Stellar Properties

Surface gravity (log g)

4.174 dex

Stellar density

0.607 g/cm³

Systemic radial velocity

-66.80 km/s

Rotational v·sin i

3.10 km/s

Rotation period

18.00 days

Activity index (log R'HK)

-4.970

Metallicity ratio

[Fe/H]

Distance

11.81 parsec

Light-years 38.53 ly

V-band magnitude

4.42 mag

Voyager-speed travel 679,559 yr

Multi-band Host Photometry — 12 bands

Astrometric Data

Parallax

84.612 mas

Total Proper Motion

234.602 mas/yr

PM Right Ascension

-224.11 mas/yr

PM Declination

-69.38 mas/yr

Galactic Cartesian (pc)

x = -0.546 · y = -0.828 · z = 0.128

Equatorial (J2000)

RA 236.60992° · Dec 7.35277°

Galactic ℓ, b

15.696° · 44.104°

Ecliptic λ, β

232.400° · 26.539°

HTM-20 index

916779481

Observation Record

Photometric series

RV measurements

Stellar spectra

Archive notes