Pulsar
PSR B1641-68 (J1646-6831)
Radio pulsar
A neutron star spinning once every 1.79 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 | Triangulum Australe |
| Period | 1.786 s |
| Period derivative | 1.7×10⁻¹⁵ s/s |
| Characteristic age | 17 million years |
| Magnetic field | 1.8×10¹² G |
| Spin-down luminosity | 1.2×10³¹ erg/s |
| Dispersion measure | 41.9 pc/cm³ |
| Distance | 1,217 pc (4.0 thousand ly) |
| Discovery | 1978 · mol2, htru_pks, misc, pks70, pkssw |
| Source | ATNF Pulsar Catalogue |
| Right ascension (J2000) | 16h 46m 54.9s |
| Declination (J2000) | −68° 31′ 52″ |
In the sky
Visible from the whole Southern Hemisphere and north to latitude 21° N. South of latitude 21° S it never sets. It stands highest at midnight in May, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around 1944 BC. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 70 million years.