Key parameters at a glance

A radius of 14.10 Earth radii
A mass of 190.06 Earth masses
Surface gravity around 0.96 g
An orbital period of 298.430 days
Semi-major axis 0.9750 AU
Distance from Earth 422.71 light-years
Earth Similarity Index 0.268
Travel time at Voyager 1 speed 7,454,454 years

HD 175541 b Planet Profile

Physical Specs

Radius

14.10 R⊕

Radius (Jupiter)

1.260 R♃

Mass

190.06 M⊕

Mass (Jupiter)

0.598 M♃

Density

0.37 g/cm³

Surface Gravity

0.96 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.268

HZ Position Unknown

Controversial No

Discovery

Year 2007

Method Radial Velocity

Facility W. M. Keck Observatory

Telescope 10 m Keck I Telescope

Size rank in cohort

Rank by radius

#371of 1771

top 20.9%

This planet

14.10R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HD 27894 b 14.10 R⊕ HD 103720 b 14.10 R⊕ HD 216770 b 14.10 R⊕

Metric	Earth	HD 175541 b	Jupiter
Radius (R⊕)	1.00	14.10	11.21
Mass (M⊕)	1.00	190.06	317.83
Density (g/cm³)	5.51	0.37	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)	190.062 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 175541

HIP

HIP 92895

TIC

TIC 227196910

Gaia DR2

Gaia DR2 4281180283478682496

Gaia DR3

Gaia DR3 4281180283478682496

System

HD 175541

Percentile among Gas Giant cohort

Radius 14.100 R⊕ · percentile 77 / cohort 1771

Mass 190.062 M⊕ · percentile 18 / cohort 1747

Orbital period 298.43 d · percentile 61 / cohort 1533

Distance 129.60 pc · percentile 40 / cohort 1759

ESI 0.268 · percentile 49 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

298.430 days

Semi-major axis

0.9750 AU

Eccentricity

0.110

Inclination

— °

Year Length

A year here lasts approximately 298.43 Earth days (81.7% of a terrestrial year) on a mildly elliptical path at a mean orbital distance of 0.9750 AU.

Extended Orbital Architecture

RV semi-amplitude (K)

14.680 m/s

Transit mid-time (BJD)

2,454,003.5000

Long. of periastron (ω)

129.00°

Angular separation (arcsec)

7.52000

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.268

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Johnson et al. 2007

Instrument

HIRES Spectrometer

Publication

2007-08

Observation locale

Ground

Discovery cohort

Planets confirmed in 2007 at W. M. Keck Observatory (7 shown).

HD 11506 b · Gas Giant HD 125612 b · Gas Giant HD 75898 b · Gas Giant GJ 317 b · Gas Giant HD 5319 b · Gas Giant HD 231701 b · Gas Giant HD 170469 b · Gas Giant

Host System: HD 175541

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,013 K — cooler than the Sun (5,778 K)

Estimated Age

1.90 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

4.190 R☉

Stellar Mass

1.390 M☉

Metallicity [Fe/H]

-0.07

Extended Stellar Properties

Surface gravity (log g)

3.330 dex

Systemic radial velocity

19.81 km/s

Rotational v·sin i

2.90 km/s

Activity index (log R'HK)

-5.230

Metallicity ratio

[Fe/H]

Distance

129.60 parsec

Light-years 422.71 ly

V-band magnitude

8.02 mag

Voyager-speed travel 7,454,454 yr

Multi-band Host Photometry — 12 bands

Astrometric Data

Parallax

7.688 mas

Total Proper Motion

90.478 mas/yr

PM Right Ascension

-6.74 mas/yr

PM Declination

-90.23 mas/yr

Galactic Cartesian (pc)

x = 0.240 · y = -0.968 · z = 0.074

Equatorial (J2000)

RA 283.92032° · Dec 4.26493°

Galactic ℓ, b

37.211° · 1.002°

Ecliptic λ, β

285.609° · 26.953°

HTM-20 index

394436026

Observation Record

Photometric series

RV measurements

Stellar spectra