Notable for having characteristics of both Type Ia and Type IIn. NGC 2403 is an outlying member of the M81 GroupĪnnounced in 2007 to be the brightest supernova up to that point. Linked to GRB 980425, which was the first time a gamma-ray burst has been linked to a supernova. One of the brightest supernovae in the northern sky since 1954 Notable for archival photos of progenitor star and detection of supernova neutrinos. Intense radiation reached Earth on February 23, 1987, 7:35:35 UT. 'Posthumously' discovered in 1985 age determined in 2008įirst observation of an extragalactic supernovaįollowed for more than a year became the prototypical Type Ia supernova Kepler's Star most recent readily visible supernova within the Milky WayĪpparently never visually conspicuous, due to interstellar dust but the remnant, Cas A, is the brightest extrasolar radio source in the sky Remnant is the Crab Nebula with its pulsar (neutron star) Widely observed on Earth in apparent magnitude, the brightest stellar event in recorded history. Some researchers have suggested it was a comet, not a supernova. The remnant is probably RCW 86, some 8200 ly distant, making it comparable to SN 1572. Surviving description sketchy modern estimates of maximum apparent magnitude vary from +4 to −8. In most entries, the year when the supernova was seen is part of the designation (1st column).
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