Pulsar
PSR B1757-23 (J1800-2343)
Radio pulsar
A neutron star spinning once every 1.03 seconds; the beams from its magnetic poles sweep across Earth on every turn. Period, spin-down, distance and orbit come from the ATNF Pulsar Catalogue; the beam geometry is illustrative.
| Type | Pulsar |
|---|---|
| Constellation | Sagittarius |
| Period | 1.031 s |
| Dispersion measure | 280.0 pc/cm³ |
| Distance | 3,559 pc (11.6 thousand ly) |
| Discovery | 1983 · misc |
| Source | ATNF Pulsar Catalogue |
| Right ascension (J2000) | 18h 00m 00.0s |
| Declination (J2000) | −23° 43′ 00″ |
In the sky
Visible from the whole Southern Hemisphere and north to latitude 66° N. South of latitude 66° S it never sets. It stands highest at midnight in June, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out 12 thousand years ago. At that time the first farming villages were being founded; there was no writing yet. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 206 million years.