Pulsar
PSR B1935+25 (J1937+2544)
Radio pulsar
A neutron star spinning once every 0.201 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 | Vulpecula |
| Period | 201.0 ms |
| Period derivative | 6.4×10⁻¹⁶ s/s |
| Characteristic age | 5.0 million years |
| Magnetic field | 3.6×10¹¹ G |
| Spin-down luminosity | 3.1×10³³ erg/s |
| Dispersion measure | 53.2 pc/cm³ |
| Distance | 3,100 pc (10.1 thousand ly) |
| Discovery | 1985 · gb2, ar3, lotaas, fast_gpps |
| Source | ATNF Pulsar Catalogue |
| Right ascension (J2000) | 19h 37m 01.2s |
| Declination (J2000) | +25° 44′ 14″ |
In the sky
Visible from the whole Northern Hemisphere and south to latitude 64° S. North of latitude 64° N it never sets. It stands highest at midnight in July, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out 10 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 179 million years.