SS 433
SS 433 is a microquasar or eclipsing X-ray binary system, consisting of a stellar-mass black hole accreting matter from an A-type companion star. SS 433 is the first discovered microquasar. It is at the centre of the supernova remnant W50.
SS 433 at the centre of supernova remnant W50 Credit: NRAO/AUI/NSF, K. Golap, M. Goss; NASA’s Wide Field Survey Explorer (WISE) | |
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Aquila |
| Right ascension | 19h 11m 49.56s |
| Declination | +04° 58′ 57.8″ |
| Apparent magnitude (V) | 13.0 - 17.3 |
| Characteristics | |
| Spectral type | A7Ib |
| Variable type | Eclipsing binary |
| Astrometry | |
| Proper motion (μ) | RA: −3.027 mas/yr Dec.: −4.777 mas/yr |
| Parallax (π) | 0.1182 ± 0.0233 mas |
| Distance | 18,000±700 ly (5,500±200 pc) |
| Orbit | |
| Period (P) | 13.082 d |
| Eccentricity (e) | 0.05 ± 0.01 |
| Inclination (i) | 79° |
| Other designations | |
V1343 Aql, GAL 039.7-02.0, 2MASS J19114957+0458578, USNO 659, 1A 1909+04, 87GB 190920.8+045332, NEK 40.1-02.1, 3A 1909+048, GPS 1909+049, RGB J1911+049, BWE 1909+0453, GRS 039.60 -01.80, RX J1911.7+0459, 4C 04.66, 1H 1908+047, 1RXS J191149.7+045857, 2E 1909.3+0453, HBHA 204-02, AAVSO 1906+04, 2E 4204, INTEGRAL1 110, TXS 1909+048, 1ES 1909+04.8, INTREF 969, 4U 1908+05. | |
| Database references | |
| SIMBAD | data |
SS 433's designation comes from the initials of two astronomers at Case Western Reserve University: Nicholas Sanduleak and Charles Bruce Stephenson. It was the 433rd entry in their 1977 catalog of stars with strong emission lines. Its emission lines were studied by Mordehai Milgrom in 1979.
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