Key parameters at a glance

A radius of 13.90 Earth radii
A mass of 291.12 Earth masses
Surface gravity around 1.51 g
An orbital period of 3.093 days
Semi-major axis 0.0443 AU
Distance from Earth 89.55 light-years
Earth Similarity Index 0.300
Travel time at Voyager 1 speed 1,579,278 years

HD 179949 b Planet Profile

Physical Specs

Radius

13.90 R⊕

Radius (Jupiter)

1.240 R♃

Mass

291.12 M⊕

Mass (Jupiter)

0.916 M♃

Density

0.60 g/cm³

Surface Gravity

1.51 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.300

HZ Position Unknown

Controversial No

Discovery

Year 2000

Method Radial Velocity

Facility Anglo-Australian Telescope

Telescope 3.9 m Anglo-Australian Telescope

Size rank in cohort

Rank by radius

#456of 1771

top 25.7%

This planet

13.90R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

24 Sex c 13.90 R⊕ HD 148156 b 13.90 R⊕ HD 134987 c 13.90 R⊕

Metric	Earth	HD 179949 b	Jupiter
Radius (R⊕)	1.00	13.90	11.21
Mass (M⊕)	1.00	291.12	317.83
Density (g/cm³)	5.51	0.60	1.33
Surface Gravity (g)	1.00	1.51	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	291.120 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 179949

HIP

HIP 94645

TIC

TIC 2288734

Gaia DR2

Gaia DR2 6770313530317154560

Gaia DR3

Gaia DR3 6770313530317154560

System

HD 179949

Percentile among Gas Giant cohort

Radius 13.900 R⊕ · percentile 72 / cohort 1771

Mass 291.120 M⊕ · percentile 32 / cohort 1747

Orbital period 3.09 d · percentile 17 / cohort 1533

Distance 27.46 pc · percentile 6 / cohort 1759

ESI 0.300 · percentile 58 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

3.093 days

Semi-major axis

0.0443 AU

Eccentricity

0.022

Inclination

— °

Year Length

A year here lasts approximately 3.09 Earth days (0.8% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0443 AU.

Extended Orbital Architecture

RV semi-amplitude (K)

112.600 m/s

Transit mid-time (BJD)

2,453,197.1750

Long. of periastron (ω)

192.00°

Angular separation (arcsec)

1.61000

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.300

0 = alien, 1 = Earth-identical

Detection Signatures

Radial velocity

Stellar wobble has been measured spectroscopically.

Orbital-brightness modulation

Host star brightness varies with the planet's orbit.

Discovery Paper

Primary reference

Tinney et al. 2001

Instrument

UCLES Spectrograph

Publication

2001-04

Observation locale

Ground

Discovery cohort

Planets confirmed in 2000 at Anglo-Australian Telescope (2 shown).

HD 27442 b · Gas Giant HD 160691 b · Unclassified

Host System: HD 179949

Spectral Class

F-type yellow-white

Effective Temperature

6,168 K — hotter than the Sun (5,778 K)

Estimated Age

2.56 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.267 R☉

Stellar Mass

1.210 M☉

Metallicity [Fe/H]

0.14

Extended Stellar Properties

Surface gravity (log g)

4.341 dex

Stellar density

0.860 g/cm³

Systemic radial velocity

-24.70 km/s

Rotational v·sin i

6.30 km/s

Activity index (log R'HK)

-4.790

Metallicity ratio

[Fe/H]

Distance

27.46 parsec

Light-years 89.55 ly

V-band magnitude

6.25 mag

Voyager-speed travel 1,579,278 yr

Multi-band Host Photometry — 12 bands

Astrometric Data

Parallax

36.392 mas

Total Proper Motion

156.546 mas/yr

PM Right Ascension

118.55 mas/yr

PM Declination

-102.24 mas/yr

Galactic Cartesian (pc)

x = 0.295 · y = -0.863 · z = -0.410

Equatorial (J2000)

RA 288.88902° · Dec -24.17979°

Galactic ℓ, b

13.455° · -15.787°

Ecliptic λ, β

287.183° · -1.860°

HTM-20 index

-2043466122

Observation Record

Photometric series

RV measurements

Stellar spectra

Archive notes