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PSR B1957+20

Primary Facts on PSR B1957+20

  • PSR B1957+20's star type is pulsar that can be located in the constellation of Sagitta. The description is based on the spectral class.
  • PSR B1957+20 is not part of the constellation outline but is within the borders of the constellation.
  • It is calculated at being 2.200 Billion Years old. This information comes from ExoPlanet.
  • PSR B1957+20 has at least 1 Extrasolar Planets believed to be in orbit around the star.
  • The star is calculated at being about 4990.26 light years away from us.

Location of PSR B1957+20

The location of the star in the night sky is determined by the Right Ascension (R.A.) and Declination (Dec.), these are equivalent to the Longitude and Latitude on the Earth. The Right Ascension is how far expressed in time (hh:mm:ss) the star is along the celestial equator. If the R.A. is positive then its eastwards. The Declination is how far north or south the star is compared to the celestial equator and is expressed in degrees. For PSR B1957+20, the location is 19h 59m 37.00 and 20° 48` 15.00 .

Physical Properties (Age) of PSR B1957+20

PSR B1957+20 has a spectral type of PSR.

The star is believed to be about 2.20 Billion years old. To put in context, the Sun is believed to be about five billion years old and the Universe is about 13.8 billion years old.

Distance to PSR B1957+20

The Parallax of the star is given as 0.65 which gives a calculated distance to PSR B1957+20 of 4990.26 light years from the Earth or 1529.99 parsecs. It would take a spaceship travelling at the speed of light, 4990.26 years to get there. We don't have the technology or spaceship that can carry people over that distance yet.

The star is roughly 315,580,891.91 Astronomical Units from the Earth/Sun give or take a few. An Astronomical Unit is the distance between Earth and the Sun. The number of A.U. is the number of times that the star is from the Earth compared to the Sun.

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Additional PSR B1957+20 Facts and Figures

Visual Facts

Primary / Proper / Traditional NamePSR B1957+20
Spectral TypePSR
Constellation's Main StarNo
Multiple Star SystemNo / Unknown
Star TypePulsar
GalaxyMilky Way
Age2.20 Billion Years Old
Right Ascension (R.A.)19h 59m 37.00
Declination (Dec.)20° 48` 15.00
Distance from Earth0.65 Parallax (milliarcseconds)
 4990.26 Light Years
 1529.99 Parsecs
 315,580,891.91 Astronomical Units

Companions (Multi-Star and Exoplanets) Facts

Exoplanet Count1

Sources and Links


List of Extrasolar Planets orbiting PSR B1957+20

NameStatusMass (Jupiters)Orbital Period (Days)EccentricityDiscoveredSemi-Major AxisPeriastron
PSR B1957+20 bConfirmed0.3801988

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Comments and Questions

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