An object was discovered on Feb. 24.37 UT (position R.A. = 5h35m.8, Decl. = -6918'), obtained m = 4.8 on Feb. 24.454 UT. This object proved to be the most famoussupernova (SN) in the 20th Century and the brightest visible from Earth since 1604.It is classified as a SN of the type Il in the Large Magellanic Cloud (SN1987A). Itsbrightness peaked in May 1987, with an apparent magnitude of m = 2.8.a) Find the absolute magnitude M of the SN1987A at maximum. Distance of theLMC is 51,400 pc.b) The progenitor (before SN explosion) star was a blue supergiant of theapparent magnitude m = 12.8. How much brighter (in terms of flux density)this SN was at maximum compared to the progenitor star. Find the ratio FSN/Ebetore

Absolute magnitude and apparent magnitude of any stellar object are related as M=m-2.5logd102M is…

Answered: An object was discovered on Feb. 24.37…

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