# List of neutron stars

Neutron stars are the collapsed cores of supergiant stars. They are created as a result of supernovas and gravitational collapse, and are the second-smallest and densest class of stellar objects. In the cores of these stars, protons and electrons combine to form neutrons. Neutron stars can be classified as pulsars if they are magnetized, if they rotate, and if they emit beams of electromagnetic radiation out of their magnetic poles. They may include soft gamma repeaters (SGR) and radio-quiet neutron stars, as well as pulsars such as radio pulsars, recycled pulsars, low mass X-ray pulsars, and accretion-powered pulsars. A notable grouping of neutron stars includes the Magnificent Seven.

## List of neutron stars

Caption text :
| Designation | Popular name | Type | Constellation | Right ascension | Declination | Distance (pc) | Mass (M☉) | Radius (km) | Spin period (sec) | Temperature) (K) | Notes |
| SGR 1806−20 | | Magnetar | Sagittarius | 18h 08m 39.32s | −20° 24' 39.5" | 13,000 | | | 7.55592 | | |
| RCW 103 | | Radio-quiet | Norma | 16h 17m 33.000s | −51° 02' 00.00" | 3,100-3,300 | | | | | |
| 1RXS J141256.0+792204 | Calvera | Radio-quiet | Ursa Minor | 14h 12m 55.867s | +79° 22' 03.895" | ≤2,000 | | | 0.059199071070 | | |
| RX J0822−4300 | Cosmic Cannonball | Radio-quiet | Puppis | 08h 23m 8.16s | −42° 41′ 41.4″ | 2,000 | | | | | |
| PSR B1937+21 | | Pulsar | Vulpecula | 19h 39m 38.560210s | +21° 34′ 59.14166″ | >3,600 | | | 0.0015578065 | | |
| RX J1856.5−3754 | | | Corona Australis | 18h 56m 35s | −37° 54′ 36″ | 122 | 1.5 | 12.1 | | | The Magnificent Seven |
| RBS1556 | | | | | | | | | | | The Magnificent Seven |
| RBS1223 | | | | | | | | | | | The Magnificent Seven |
| RX J0720.4−3125 | | | Canis Major | 07h 20m 24.961s | −31° 25′ 50.21″ | 360 | | 4.50 - 5.38 | | | The Magnificent Seven |
| RX J0420.0-5022 | | | | | | | | | | | The Magnificent Seven |
| PSR B1937+21 | | Pulsar | Vulpecula | 19h 39m 38.560210s | +21° 34′ 59.14166″ | 3,600 | | | 0.0015578065 | | First-discovered millisecond pulsar |
| PSR B1957+20 | Black Widow Pulsar | Eclipsing binary pulsar | Sagitta | 19h 59m 36.77s | +20° 48′ 15.12″ | 2000 | 1.66 - 1.8 | | 0.00160734 | | |
| PSR B0531+21 | Crab Pulsar | Pulsar | Taurus | 05h 34m 31.95s | +22° 00′ 52.2″ | 1,900 | | 10 | 0.0335028583 | | |
| PSR B1509−58 | | Pulsar | Circinus | 15h 13m 55.52s | −59° 08′ 08.8″ | 5,200 ±1,400 | | 9.5 | 0.1502 | | |
| PSR B0329+54 | | Pulsar | Camelopardalis | 03h 32m 59.368s | +54° 34′ 43.57″ | 1,060 | | | 0.71452 | | |
| PSR B0943+10 | | Pulsar | Leo | 09h 46m 7.31s | +09° 51′ 57.3″ | 630 ±100 | 1.5 | | 1.1 | 3,100,000 | |
| PSR B1257+12 | Lich | Pulsar | Virgo | 13h 00m 01s | +12° 40′ 57″ | 710 ±40 | | | 0.006219 | | Host to the first-discovered extrasolar and pulsar planets |
| PSR B1620−26 | | Pulsar | Scorpius | 16h 23m 38.2218s | −26° 31′ 53.769" | 3,800 | 1.35 | 20.85 | | ≤ 30,000 | Binary with a white dwarf |
| PSR B1828−11 | | Pulsar | Scutum | 18h 30m 47.75s | −10° 59′ 10.8″ | 3,200 | | | | | |
| PSR B1919+21 | Little Green Men | Pulsar | Vulpecula | 19h 21m 44.815s | +21° 53′ 02.25" | 100-1100 | 1.4 | 9.7398 | 1.3373 | | First-discovered radio pulsar |
| PSR J0348+0432 | | Pulsar | Taurus | 03h 48m 43.639s | +04° 32′ 11.458″ | 2,100 | 2.01 | 13 ±2 | 0.0391226569017806 | | Binary with a white dwarf |
| PSR J0737−3039A | | Double pulsar | Puppis | 07h 37m 51.248s | −30° 39′ 40.83″ | 1150 | 1.338 | | 0.022699379740922 | | First-known double pulsar |
| PSR J0737−3039B | | Double pulsar | Puppis | 07h 37m 51.248s | −30° 39′ 40.83″ | 1150 | 1.249 | | 2.7734613485 | | First-known double pulsar |
| PSR J0740+6620 | | Pulsar | Camelopardalis | 07h 40m 45.799s | +66° 20′ 33.60″ | 1,410 | 2.08 | 12.39 | | | Binary with a white dwarf |
| PSR J0952–0607 | | Black Widow Pulsar | Sextans | 09h 52m 08.319s | −06° 07′ 23.49″ | 970, 1720, or 6260 | 2.35 | | 0.00141379836 | | Fastest spinning pulsar known within the Milky Way |
| PSR J1311–3430 | | Pulsar | Centaurus | 13h 11m 45.724s | −34° 30′ 30.35″ | | 2.7 | | 0.0025 | | |
| PSR J1614−2230 | | Pulsar | Scorpius | 16h 14m 36.5051s | −22° 30′ 31.081″ | 1,200 | 1.908 | 13 ±2 | 0.0031508076534271 | | Binary with a white dwarf |
| PSR J1719−1438 | | Pulsar | Serpens | 17:19:10.0730(1) | −14:38:00.96(2) | 1,200 | 1.4 | 19 | 0.0058 | | |
| PSR J1748-2021B | | Pulsar | Virgo | 17h 48m 52.9522s | −20h 21m 38.90s | 223 | 2.548 | | | | |
| PSR J1946+2052A | | Pulsar | Vulpecula | 19h 46m 14.130s | +20° 52′ 24.64″ | 3500 - 4200 | <1.31 | | 0.0169601753230 | | |
| PSR J1946+2052A | | Neutron star | Vulpecula | 19h 46m 14.130s | +20° 52′ 24.64″ | 3500 - 4200 | >1.18 | | | | |
| PSR J2124−3358 | | Pulsar | Microscopium | 21h 24m 43.8464s | −33° 58′ 44.961″ | 270 | | | | | |
| PSR J0835-4510 | Vela Pulsar | Pulsar | Vela | 08h 35m 20.65525s | −45° 10′ 35.1545″ | 294 | | | 0.08933 | | |

### Anomalous X-ray pulsars

* Anomalous X-ray pulsar (AXP)
* AXP 1E 1048-59
* AXP 1E2259+586
* AXP4U 0142+61
* AXP 1RXS 1708–40
* AXP 1E 1841–045
* AXP AXJ1844-0258
* AXP CXJ0110-7211
* Vela X-1
* 4U 0352+309
* Bursting Pulsar
* Vela Junior
* LMC N49

## Binary star systems

* Intermediate-mass X-ray binary
* High-mass X-ray binaries
* Centaurus X-3
* Circinus X-1
* GX 301-2
* Hercules X-1

## Related objects

* Kesteven 79
* PSR B1620−26 b
* 3C 58
* Cas X-1
* GW170817
* Cygnus loop
* Spaghetti Nebula
* SN 1987A
* Jellyfish nebula