LMC X-4
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Dorado |
| Right ascension | 05h 32m 49.56s |
| Declination | −66° 22′ 13.2″ |
| Characteristics | |
| Evolutionary stage | Blue supergiant + Pulsar |
| Spectral type | O8III |
| Astrometry | |
| Radial velocity (Rv) | 284 km/s |
| Proper motion (μ) | RA: 1.757 mas/yr Dec.: 0.407 mas/yr |
| Distance | 163,000 ly |
| Orbit | |
| Primary | Supergiant star |
| Name | A |
| Period (P) | 1.40830 ± 0.0005 days |
| Details | |
| A | |
| Mass | 25 M☉ |
| B | |
| Mass | 1.4 M☉ |
| Other designations | |
| LMC X-4, 2MASS J05324953-6622132, SWIFT J0532.5-6623A, TIC 276861105, Gaia DR3 4660300345280168192 | |
| Database references | |
| SIMBAD | data |
LMC X-4 is an eclipsing high-mass X-ray binary (HMXB) pulsar system located in the Large Magellanic Cloud (LMC), a satellite galaxy of the Milky Way approximately 163,000 light-years away. Discovered in 1972 by the Uhuru X-ray observatory, it consists of a neutron star and a massive companion star, exhibiting periodic X-ray eclipses and long-term intensity variations.