Spectral class S Epoch J2000.0 Galactic coordinates 043.275 -00.190 Declination +09° 06' 24 | Right ascension 19 11 09 Remnant ? Distance 26,000 ly | |
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Other designations SNR G043.3-00.2, 1ES 1908+09.0 Similar Westerhout 49, SN 1006, IC 443, Cassiopeia A, W50 | ||
W49b in 60 seconds
W49B (also known as SNR G043.3-00.2 or 3C 398) is a nebula resulting from a type Ib or Ic supernova. If the supernova was visible from Earth it would have been seen around 1000 AD (the remnant "is about a thousand years old") which may have produced a gamma-ray burst and may have produced a black hole.
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W49B is barrel-shaped and located roughly 26,000 light-years from Earth. Recent findings indicate infrared "rings" (about 25 light-years in diameter) around the "barrel", and also indicate intense X-ray radiation coming from nickel and iron along its axis. The star that created this nebula is thought to have formed from a dense dust cloud before throwing off hot, gaseous rings, creating a bubble, and exploding.
Supernova remnant w49b
References
W49B Wikipedia(Text) CC BY-SA