Confirmed Exoplanet Discovered 2011

PSR J1719-1438 b

A unclassified orbiting the k-type orange PSR J1719-1438, located approximately 3,913.9 light-years from Earth.

Key parameters at a glance

  • A mass of 382.80 Earth masses
  • An orbital period of 0.091 days
  • Semi-major axis 0.0044 AU
  • Distance from Earth 3,913.87 light-years
  • Travel time at Voyager 1 speed 69,021,129 years
  • Almost certainly tidally locked to its host star given the close orbit

PSR J1719-1438 b Planet Profile

Physical Specs

Radius
— R⊕
Radius (Jupiter)
— R♃
Mass
382.80 M⊕
Mass (Jupiter)
1.200 M♃
Density
23.00 g/cm³
Surface Gravity
— g (Earth)

Classification

Planet Type

Unclassified

ESI Score —
HZ Position Unknown
Controversial No

Discovery

Year 2011
Method Pulsar Timing
Facility Parkes Observatory
Telescope 64 m Parkes Radio Telescope
Metric Earth PSR J1719-1438 b Jupiter
Radius (R⊕)1.00—11.21
Mass (M⊕)1.00382.80317.83
Density (g/cm³)5.5123.001.33
Surface Gravity (g)1.00—2.53
Insolation (S⊕)1.00—0.037

Alternative Mass Estimates

Method Value Interpretation
Best measured mass 382.800 M⊕ Direct mass measurement (not derived).

Percentile among Unclassified cohort

Mass 382.800 M⊕ · percentile 7 / cohort 42
Orbital period 0.09 d · percentile 0 / cohort 43
Distance 1,200.00 pc · percentile 98 / cohort 43

Orbit & Habitability

Orbital Dynamics

Period
0.091 days
Semi-major axis
0.0044 AU
Eccentricity
0.060
Inclination
— °

Year Length

A year here lasts roughly 2.2 hours long on a nearly circular orbit at a mean orbital distance of 0.0044 AU.

Eq. Temperature

—

 

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

—

0 = alien, 1 = Earth-identical

Insufficient insolation data. Close-orbiting tidally-locked around a cool host.

Discovery Paper

Primary reference

Bailes et al. 2011

Instrument

Parkes Radio Receiver

Publication

2011-09

Observation locale

Ground

Host System: PSR J1719-1438

Spectral Class

K-type orange

Effective Temperature

4,500 K — cooler than the Sun (5,778 K)

Estimated Age

12.50 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

—

Stellar Mass

1.400 M☉

Metallicity [Fe/H]

—

Distance
1,200.00 parsec
Light-years 3,913.87 ly
V-band magnitude
— mag
Voyager-speed travel 69,021,129 yr

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