Key parameters at a glance

A radius of 13.10 Earth radii
A mass of 1,017.00 Earth masses
Surface gravity around 5.93 g
An orbital period of 181.400 days
Semi-major axis 0.7000 AU
Distance from Earth 143.61 light-years
Earth Similarity Index 0.402
Travel time at Voyager 1 speed 2,532,523 years

91 Aqr b Planet Profile

Physical Specs

Radius

13.10 R⊕

Radius (Jupiter)

1.170 R♃

Mass

1,017.00 M⊕

Mass (Jupiter)

3.200 M♃

Density

2.49 g/cm³

Surface Gravity

5.93 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.402

HZ Position Unknown

Controversial No

Discovery

Year 2013

Method Radial Velocity

Facility Lick Observatory

Telescope 0.6 m Coude Auxiliary Telescope

Size rank in cohort

Rank by radius

#910of 1771

top 51.3%

This planet

13.10R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

GJ 3021 b 13.10 R⊕ HD 221287 b 13.10 R⊕ HD 37605 c 13.10 R⊕

Metric	Earth	91 Aqr b	Jupiter
Radius (R⊕)	1.00	13.10	11.21
Mass (M⊕)	1.00	1,017.00	317.83
Density (g/cm³)	5.51	2.49	1.33
Surface Gravity (g)	1.00	5.93	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	1,017.000 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 219449

HIP

HIP 114855

TIC

TIC 4610441

Gaia DR2

Gaia DR2 2630155547353593216

Gaia DR3

Gaia DR3 2630155547353593216

System

91 Aqr

Percentile among Gas Giant cohort

Radius 13.100 R⊕ · percentile 46 / cohort 1771

Mass 1,017.000 M⊕ · percentile 67 / cohort 1747

Orbital period 181.40 d · percentile 57 / cohort 1533

Distance 44.03 pc · percentile 16 / cohort 1759

ESI 0.402 · percentile 86 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

181.400 days

Semi-major axis

0.7000 AU

Eccentricity

0.027

Inclination

— °

Year Length

A year here lasts approximately 181.40 Earth days (49.7% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.7000 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.402

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Mitchell et al. 2013

Instrument

Hamilton Echelle Spectrograph

Publication

2013-07

Observation locale

Ground

Host System: 91 Aqr

Spectral Class

K-type orange

Effective Temperature

4,665 K — cooler than the Sun (5,778 K)

Estimated Age

3.56 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

11.000 R☉

Stellar Mass

1.400 M☉

Metallicity [Fe/H]

-0.03

Extended Stellar Properties

Surface gravity (log g)

2.520 dex

Systemic radial velocity

-25.75 km/s

Rotational v·sin i

3.90 km/s

Metallicity ratio

[Fe/H]

Distance

44.03 parsec

Light-years 143.61 ly

V-band magnitude

4.24 mag

Voyager-speed travel 2,532,523 yr

Multi-band Host Photometry — 12 bands

Astrometric Data

Parallax

22.688 mas

Total Proper Motion

368.772 mas/yr

PM Right Ascension

368.37 mas/yr

PM Declination

-17.17 mas/yr

Galactic Cartesian (pc)

x = 0.969 · y = -0.189 · z = -0.158

Equatorial (J2000)

RA 348.97450° · Dec -9.08781°

Galactic ℓ, b

67.074° · -61.113°

Ecliptic λ, β

346.306° · -4.002°

HTM-20 index

-774230649

Similar Worlds

HD 4732 c

Gas Giant · K-type orange

Radius 13.10 R⊕ · 178.7 ly

HD 37605 c

Gas Giant · K-type orange

Radius 13.10 R⊕ · 152.6 ly

HD 102843 b

Gas Giant · K-type orange

Radius 13.10 R⊕ · 204.7 ly

HD 142245 b

Gas Giant · K-type orange

Radius 13.10 R⊕ · 317.1 ly

HD 112570 b

Gas Giant · K-type orange

Radius 13.10 R⊕ · 330.0 ly

KOINTREAU-3 b

Gas Giant · K-type orange

Radius 13.10 R⊕ · 458.5 ly

Explore Related Categories

Gas Giant Planets Radial Velocity Discoveries Lick Observatory Mission K-type orange Hosts