Key parameters at a glance

A radius of 13.40 Earth radii
A mass of 597.52 Earth masses
Surface gravity around 3.33 g
An orbital period of 2.146 days
Semi-major axis 0.0318 AU
Distance from Earth 595.93 light-years
Earth Similarity Index 0.361
Travel time at Voyager 1 speed 10,509,272 years

1 sibling around Pr0211

Pr0211 b shares its host star with 1 other confirmed planet. Side-by-side measurements below.

Planet	Type	Radius (R⊕)	Mass (M⊕)	Period (d)	Eq. T (K)	Year
Pr0211 b this	Gas Giant	13.40	597.52	2.146	—	2012
Pr0211 c	Gas Giant	12.60	2,475.90	4,850.000	—	2016

Pr0211 b Planet Profile

Physical Specs

Radius

13.40 R⊕

Radius (Jupiter)

1.200 R♃

Mass

597.52 M⊕

Mass (Jupiter)

1.880 M♃

Density

1.36 g/cm³

Surface Gravity

3.33 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.361

HZ Position Unknown

Controversial No

Discovery

Year 2012

Method Radial Velocity

Facility Fred Lawrence Whipple Observatory

Telescope 1.5 m Tillinghast Reflector Telescope

Size rank in cohort

Rank by radius

#730of 1771

top 41.2%

This planet

13.40R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HD 114783 c 13.40 R⊕ HIP 79431 b 13.40 R⊕ HD 68988 b 13.40 R⊕

Metric	Earth	Pr0211 b	Jupiter
Radius (R⊕)	1.00	13.40	11.21
Mass (M⊕)	1.00	597.52	317.83
Density (g/cm³)	5.51	1.36	1.33
Surface Gravity (g)	1.00	3.33	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	597.520 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

TIC

TIC 175291727

Gaia DR2

Gaia DR2 661222279785743616

Gaia DR3

Gaia DR3 661222279785743616

System

Pr0211

Percentile among Gas Giant cohort

Radius 13.400 R⊕ · percentile 56 / cohort 1771

Mass 597.520 M⊕ · percentile 53 / cohort 1747

Orbital period 2.15 d · percentile 8 / cohort 1533

Distance 182.71 pc · percentile 48 / cohort 1759

ESI 0.361 · percentile 74 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

2.146 days

Semi-major axis

0.0318 AU

Eccentricity

0.011

Inclination

— °

Year Length

A year here lasts approximately 2.15 Earth days (0.6% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0318 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.361

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Quinn et al. 2012

Instrument

TRES Echelle Spectrograph

Publication

2012-09

Observation locale

Ground

Host System: Pr0211

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,300 K — cooler than the Sun (5,778 K)

Estimated Age

0.58 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.827 R☉

Stellar Mass

0.935 M☉

Metallicity [Fe/H]

0.18

Extended Stellar Properties

Surface gravity (log g)

4.510 dex

Stellar density

2.012 g/cm³

Systemic radial velocity

34.29 km/s

Rotational v·sin i

5.10 km/s

Metallicity ratio

[Fe/H]

Distance

182.71 parsec

Light-years 595.93 ly

V-band magnitude

12.16 mag

Voyager-speed travel 10,509,272 yr

Multi-band Host Photometry — 17 bands

Astrometric Data

Parallax

5.444 mas

Total Proper Motion

38.836 mas/yr

PM Right Ascension

-36.76 mas/yr

PM Declination

-12.53 mas/yr

Galactic Cartesian (pc)

x = -0.614 · y = 0.717 · z = 0.330

Equatorial (J2000)

RA 130.54774° · Dec 19.27696°

Galactic ℓ, b

206.528° · 32.744°

Ecliptic λ, β

127.856° · 1.007°

HTM-20 index

-2087330530