Pulsar
PSR B1707-53 (J1711-5350)
Radio pulsar
A neutron star spinning once every 0.899 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 | Ara |
| Period | 899.2 ms |
| Period derivative | 1.6×10⁻¹⁴ s/s |
| Characteristic age | 917 thousand years |
| Magnetic field | 3.8×10¹² G |
| Spin-down luminosity | 8.4×10³² erg/s |
| Dispersion measure | 106.1 pc/cm³ |
| Distance | 4,498 pc (14.7 thousand ly) |
| Discovery | 1978 · mol2, htru_pks, pks70, pkssw |
| Source | ATNF Pulsar Catalogue |
| Right ascension (J2000) | 17h 11m 53.1s |
| Declination (J2000) | −53° 50′ 18″ |
In the sky
Visible from the whole Southern Hemisphere and north to latitude 36° N. South of latitude 36° 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 15 thousand years ago. At that time Homo sapiens was spreading out of Africa; there was no farming yet. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 260 million years.