Key parameters at a glance

A radius of 10.90 Earth radii
A mass of 82.64 Earth masses
Surface gravity around 0.70 g
An orbital period of 75.523 days
Semi-major axis 0.3600 AU
Distance from Earth 123.24 light-years
Earth Similarity Index 0.289
Travel time at Voyager 1 speed 2,173,366 years

HD 16141 b Planet Profile

Physical Specs

Radius

10.90 R⊕

Radius (Jupiter)

0.971 R♃

Mass

82.64 M⊕

Mass (Jupiter)

0.260 M♃

Density

0.35 g/cm³

Surface Gravity

0.70 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.289

HZ Position Unknown

Controversial No

Discovery

Year 2000

Method Radial Velocity

Facility W. M. Keck Observatory

Telescope 10 m Keck I Telescope

Size rank in cohort

Rank by radius

#1672of 1771

top 94.4%

This planet

10.90R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

XO-2 S b 10.90 R⊕ HD 142 A d 10.90 R⊕ OGLE-2018-BLG-0799L b 10.90 R⊕

Metric	Earth	HD 16141 b	Jupiter
Radius (R⊕)	1.00	10.90	11.21
Mass (M⊕)	1.00	82.64	317.83
Density (g/cm³)	5.51	0.35	1.33
Surface Gravity (g)	1.00	0.70	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	82.636 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 16141

HIP

HIP 12048

TIC

TIC 251109533

Gaia DR2

Gaia DR2 2495335115182966016

Gaia DR3

Gaia DR3 2495335115182966016

System

HD 16141

Percentile among Gas Giant cohort

Radius 10.900 R⊕ · percentile 5 / cohort 1771

Mass 82.636 M⊕ · percentile 3 / cohort 1747

Orbital period 75.52 d · percentile 52 / cohort 1533

Distance 37.79 pc · percentile 12 / cohort 1759

ESI 0.289 · percentile 55 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

75.523 days

Semi-major axis

0.3600 AU

Eccentricity

0.250

Inclination

— °

Year Length

A year here lasts approximately 75.52 Earth days (20.7% of a terrestrial year) on a mildly elliptical path at a mean orbital distance of 0.3600 AU.

Extended Orbital Architecture

RV semi-amplitude (K)

12.000 m/s

Transit mid-time (BJD)

2,451,932.3000

Long. of periastron (ω)

42.00°

Angular separation (arcsec)

9.53000

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.289

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Marcy et al. 2000

Instrument

HIRES Spectrometer

Publication

2000-06

Observation locale

Ground

Discovery cohort

Planets confirmed in 2000 at W. M. Keck Observatory (4 shown).

HD 52265 b · Gas Giant HD 168443 c · Gas Giant HD 46375 b · Gas Giant BD-10 3166 b · Gas Giant

Host System: HD 16141

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,757 K — cooler than the Sun (5,778 K)

Estimated Age

7.51 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

1.480 R☉

Stellar Mass

1.110 M☉

Metallicity [Fe/H]

0.13

Extended Stellar Properties

Surface gravity (log g)

4.140 dex

Stellar density

0.413 g/cm³

Systemic radial velocity

-51.20 km/s

Rotational v·sin i

1.93 km/s

Activity index (log R'HK)

-5.110

Metallicity ratio

[Fe/H]

Distance

37.79 parsec

Light-years 123.24 ly

V-band magnitude

6.83 mag

Voyager-speed travel 2,173,366 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

26.436 mas

Total Proper Motion

464.799 mas/yr

PM Right Ascension

-155.58 mas/yr

PM Declination

-437.99 mas/yr

Galactic Cartesian (pc)

x = 0.777 · y = 0.626 · z = -0.062

Equatorial (J2000)

RA 38.83237° · Dec -3.56249°

Galactic ℓ, b

173.941° · -55.780°

Ecliptic λ, β

35.246° · -17.815°

HTM-20 index

-973700805

Observation Record

Photometric series

RV measurements

Stellar spectra

Archive notes