Pulsar
PSR J1849+0623_P
Millisecond pulsar · binary system
A millisecond pulsar spinning 69 times per second: an old neutron star spun up again (“recycled”) by matter transferred from a companion. It shares a 6.984 days orbit with a CO white dwarf. Period, spin-down, distance and orbit come from the ATNF Pulsar Catalogue; the beam geometry is illustrative.
| Type | Pulsar |
|---|---|
| Constellation | Serpens |
| Period | 14.590 ms (69 Hz) |
| Dispersion measure | 129.4 pc/cm³ |
| Distance | 5,220 pc (17.0 thousand ly) |
| Companion | CO white dwarf (estimated), ~0.58 M☉ |
| Orbital period | 6.984 days |
| Discovery | 2025 · fast_gpps |
| Source | ATNF Pulsar Catalogue |
| Right ascension (J2000) | 18h 49m 50.0s |
| Declination (J2000) | +6° 22′ 59″ |
In the sky
Visible from the whole Northern Hemisphere and south to latitude 84° S. 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 17 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 302 million years.