| PSR J1748-2021B | |
| Event Type: | Neutron star, binary pulsar |
| Class: | Pulsar |
| Type: | Binary pulsar |
| Start Time: | March 2008 |
| Discovery: | Green Bank Telescope S-Band receiver |
| Duration: | 7514 and 4285 sec |
| Detected By: | Green Bank Telescope |
| Constellation: | Virgo |
| Ra: | 17h 48m 52.9522s (287.2205342 d) |
| Dec: | −20h 21m 38.90s (−20.360881 d) |
| Epoch: | 2000 |
| Gal: | NGC 6440 |
| Distance: | 223 pc |
| Source: | SIMBAD |
| Snrtype: | 17 |
| Host: | https://simbad.u-strasbg.fr/simbad/sim-ref?bibcode=2008ApJ...675..670F |
| B-V: | BRIGHT 2 |
| Mag V: | 2.548 Solar mass |
| Names: | NGC 6440B |
| Website: | https://simbad.cds.unistra.fr/mobile/object.html?object_name=PSR%20J1748-2021B |
| Commons: | NGC6440B |
PSR J1748-2021B is the most massive known pulsar, initially calculated with . It was first discovered by Freire[1] using the Green Bank Telescope S band receiver and Pulsar Spigot Spectrometer in Terzan 5 of globular cluster M-5.[2]
A later estimate puts the mass as .[3]