Pulsar
PSR J1701-3006D
Millisecond pulsar · in the globular cluster M62(NGC6266)
A millisecond pulsar spinning 293 times per second: an old neutron star spun up again (“recycled”) by matter transferred from a companion. It shares a 1.118 days orbit with a helium white dwarf. Period, spin-down, distance and orbit come from the ATNF Pulsar Catalogue; the beam geometry is illustrative.
| Type | Pulsar |
|---|---|
| Constellation | Ophiuchus |
| Period | 3.418 ms (293 Hz) |
| Period derivative | 1.4×10⁻¹⁹ s/s |
| Characteristic age | 399 million years |
| Magnetic field | 6.9×10⁸ G |
| Spin-down luminosity | 1.3×10³⁵ erg/s |
| Dispersion measure | 114.2 pc/cm³ |
| Distance | 6,410 pc (20.9 thousand ly) |
| Location | in the globular cluster M62(NGC6266) |
| Companion | helium white dwarf (estimated), ~0.14 M☉ |
| Orbital period | 1.118 days |
| Eccentricity | 0.000412 |
| Discovery | 2003 · misc |
| Source | ATNF Pulsar Catalogue |
| Right ascension (J2000) | 17h 01m 13.6s |
| Declination (J2000) | −30° 06′ 43″ |
In the sky
Visible from the whole Southern Hemisphere and north to latitude 60° N. South of latitude 60° 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 21 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 371 million years.