PSR J1748−2021B
| Event type | Neutron star, binary pulsar |
|---|---|
| Pulsar | |
| Date | March 2008 |
| Duration | 7514 and 4285 sec |
| Instrument | Green Bank Telescope |
| Constellation | Sagittarius |
| Right ascension | 17h 48m 52.9522s (287.2205342°) |
| Declination | −20° 21′ 38.90″ (−20.360881°) |
| Epoch | 2000 |
| Galactic coordinates | NGC 6440 |
| Distance | 223 pc |
| Source | SIMBAD |
| Remnant | 17 |
| Host | https://simbad.u-strasbg.fr/simbad/sim-ref?bibcode=2008ApJ...675..670F |
| Colour (B-V) | BRIGHT 2 |
| Peak apparent magnitude | 2.548 Solar mass |
| Other designations | NGC 6440B |
| Website | https://simbad.cds.unistra.fr/mobile/object.html?object_name=PSR%20J1748-2021B |
| Related media on Commons | |
PSR J1748−2021B is the most massive known pulsar, initially calculated with 2.74+0.21
−0.21 M☉. It was first discovered by Freire using the Green Bank Telescope S band receiver and Pulsar Spigot Spectrometer in Terzan 5 of globular cluster M-5.
A later estimate puts the mass as 2.548+0.047
−0.078 M☉.