Key parameters at a glance

A radius of 13.90 Earth radii
A mass of 252.64 Earth masses
Surface gravity around 1.31 g
An orbital period of 0.323 days
Semi-major axis 0.0102 AU
Distance from Earth 750.16 light-years
Earth Similarity Index 0.426
Travel time at Voyager 1 speed 13,229,050 years

Context from the literature

Pulsar planets are planets that are orbiting pulsars. The first such planets to be discovered were around a millisecond pulsar in 1992 and were the first extrasolar planets to be confirmed as discovered. Pulsars are extremely precise clocks and even small planets can create detectable variations in pulsar traits; the least massive exoplanet known is a pulsar planet.

Excerpted from Wikipedia · full article

PSR J2322-2650 b Planet Profile

Physical Specs

Radius

13.90 R⊕

Radius (Jupiter)

1.240 R♃

Mass

252.64 M⊕

Mass (Jupiter)

0.795 M♃

Density

1.84 g/cm³

Surface Gravity

1.31 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.426

HZ Position Unknown

Controversial No

Discovery

Year 2017

Method Pulsar Timing

Facility Parkes Observatory

Telescope 64 m Parkes Radio 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	PSR J2322-2650 b	Jupiter
Radius (R⊕)	1.00	13.90	11.21
Mass (M⊕)	1.00	252.64	317.83
Density (g/cm³)	5.51	1.84	1.33
Surface Gravity (g)	1.00	1.31	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	252.643 M⊕	Lower bound from radial-velocity fitting.

Percentile among Gas Giant cohort

Radius 13.900 R⊕ · percentile 72 / cohort 1771

Mass 252.643 M⊕ · percentile 27 / cohort 1747

Orbital period 0.32 d · percentile 0 / cohort 1533

Distance 230.00 pc · percentile 54 / cohort 1759

ESI 0.426 · percentile 93 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

0.323 days

Semi-major axis

0.0102 AU

Eccentricity

0.002

Inclination

— °

Year Length

A year here lasts roughly 7.8 hours long on a nearly circular orbit at a mean orbital distance of 0.0102 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.426

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Spiewak et al. 2018

Instrument

Parkes Radio Receiver

Publication

2018-03

Observation locale

Ground

Host System: PSR J2322-2650

Spectral Class

Unknown

Effective Temperature

—

Estimated Age

—

Stellar Radius

—

Stellar Mass

1.400 M☉

Metallicity [Fe/H]

—

Distance

230.00 parsec

Light-years 750.16 ly

V-band magnitude

— mag

Voyager-speed travel 13,229,050 yr

Astrometric Data

Parallax

4.400 mas

Total Proper Motion

8.600 mas/yr

PM Right Ascension

-2.40 mas/yr

PM Declination

-8.30 mas/yr

Galactic Cartesian (pc)

x = 0.880 · y = -0.145 · z = -0.452

Equatorial (J2000)

RA 350.64435° · Dec -26.84953°

Galactic ℓ, b

28.637° · -70.228°

Ecliptic λ, β

340.439° · -20.897°

HTM-20 index

1634685671

Wikipedia → Image: Wikimedia Commons · NASA/JPL-Caltech · Public domain

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