Key parameters at a glance

A radius of 11.90 Earth radii
A mass of 8,714.85 Earth masses
Surface gravity around 61.54 g
An orbital period of 653.220 days
Semi-major axis 1.5000 AU
Distance from Earth 108.81 light-years
Earth Similarity Index 0.254
Travel time at Voyager 1 speed 1,918,914 years

HD 141937 b Planet Profile

Physical Specs

Radius

11.90 R⊕

Radius (Jupiter)

1.060 R♃

Mass

8,714.85 M⊕

Mass (Jupiter)

27.420 M♃

Density

28.40 g/cm³

Surface Gravity

61.54 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.254

HZ Position Unknown

Controversial No

Discovery

Year 2002

Method Radial Velocity

Facility La Silla Observatory

Telescope 1.2 m Leonhard Euler Telescope

Size rank in cohort

Rank by radius

#1526of 1771

top 86.1%

This planet

11.90R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

2MASS J22501512+2325342 b 11.90 R⊕ KMT-2020-BLG-0414L c 11.90 R⊕ DENIS-P J082303.1-491201 b 11.90 R⊕

Metric	Earth	HD 141937 b	Jupiter
Radius (R⊕)	1.00	11.90	11.21
Mass (M⊕)	1.00	8,714.85	317.83
Density (g/cm³)	5.51	28.40	1.33
Surface Gravity (g)	1.00	61.54	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	8,714.855 M⊕	Direct mass measurement (not derived).
Minimum mass (M sin i)	3,079.773 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 141937

HIP

HIP 77740

TIC

TIC 437430894

Gaia DR2

Gaia DR2 6248534171318085376

Gaia DR3

Gaia DR3 6248534171318085376

System

HD 141937

Percentile among Gas Giant cohort

Radius 11.900 R⊕ · percentile 13 / cohort 1771

Mass 8,714.855 M⊕ · percentile 99 / cohort 1747

Orbital period 653.22 d · percentile 71 / cohort 1533

Distance 33.36 pc · percentile 9 / cohort 1759

ESI 0.254 · percentile 46 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

653.220 days

Semi-major axis

1.5000 AU

Eccentricity

0.410

Inclination

— °

Year Length

A year here lasts about 1.79 Earth years on a highly eccentric trajectory at a mean orbital distance of 1.5000 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.254

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Udry et al. 2002

Instrument

CORALIE Spectrograph

Publication

2002-07

Observation locale

Ground

Discovery cohort

Planets confirmed in 2002 at La Silla Observatory (4 shown).

HD 47536 b · Gas Giant HD 162020 b · Gas Giant HD 108147 b · Gas Giant HD 168746 b · Gas Giant

Host System: HD 141937

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,870 K — hotter than the Sun (5,778 K)

Estimated Age

2.32 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.030 R☉

Stellar Mass

1.090 M☉

Metallicity [Fe/H]

0.11

Extended Stellar Properties

Surface gravity (log g)

4.450 dex

Stellar density

1.238 g/cm³

Systemic radial velocity

-2.92 km/s

Rotational v·sin i

2.10 km/s

Rotation period

13.25 days

Activity index (log R'HK)

-4.650

Metallicity ratio

[Fe/H]

Distance

33.36 parsec

Light-years 108.81 ly

V-band magnitude

7.25 mag

Voyager-speed travel 1,918,914 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

29.945 mas

Total Proper Motion

99.091 mas/yr

PM Right Ascension

97.23 mas/yr

PM Declination

19.11 mas/yr

Galactic Cartesian (pc)

x = -0.502 · y = -0.805 · z = -0.316

Equatorial (J2000)

RA 238.07356° · Dec -18.43597°

Galactic ℓ, b

351.889° · 26.781°

Ecliptic λ, β

239.869° · 1.727°

HTM-20 index

-2134869660

Observation Record

Photometric series

RV measurements

Stellar spectra

Archive notes