SN 1961i was a supernova that was discovered in June 1961 in the Messier 61 (NGC 4303) galaxy, by Milton L. Humason at the Palomar Observatory, the brightest of 16 supernovae found at Palomar that year.
 Although it was originally consider by Fritz Zwicky to be the prototype of a type III supernova, subsequent researchers have classified it as a type II supernova.
SN 1961V was an abnormal, supernova-like event that was a potential supernova impostor.
 The potential impostor nature of SN 1961V was first identified by Fritz Zwicky in 1964.
 SN 1961V occurred in galaxy NGC 1058, about 9.3 Mpc away (about 30 million light years).
 Unlike many supernovae, the progenitor star is tentatively known: an extremely large, very bright blue star, similar to Eta Carinae.
 Mass estimates of the precursor star were as high as 2000 times the mass of the sun, but these are likely to be extreme overestimates.
 If SN 1961V was not a supernova then it was most likely an extremely large outburst by a luminous blue variable star.
John V. Evans (born 5 July 1933) is a British-American radio astronomer born in Manchester, England.
 He obtained his Ph.D. at the University of Manchester, and has been a professor at the Lincoln Laboratory of the Massachusetts Institute of Technology since 1960.
Fritz Zwicky (February 14, 1898 – February 8, 1974) was a Swiss astronomer.
 He worked most of his life at the California Institute of Technology in the United States of America, where he made many important contributions in theoretical and observational astronomy.
 In 1933, Zwicky was the first to use the virial theorem to infer the existence of unseen dark matter, describing it as ""dunkle Materie "".
Johann Jakob Huber (27 August 1733 in Basel - 21 August 1798 in Gotha during the first European astronomical congress) was a Swiss astronomer.
Leopold Courvoisier (1873–1955) was a Swiss astronomer.
 He was born in Riehen, Switzerland, near Basel.
 He was the chief observer at the observatory in Babelsberg (near Berlin) from 1905 to 1938.
Bruno Leibundgut (* 1.
 April 1960 ) is a Swiss astronomer born in Basel.
 He has become well known especially because of discoveries regarding the Supernova Cosmology.
 He was a member of the High-z Supernova Search Team and participated in the establishing of the Very Large Telescope.
I Zwicky 18 is a dwarf irregular galaxy located about 59 million light years away in the constellation Ursa Major.
 The galaxy was first identified by Swiss astronomer Fritz Zwicky in a 1930s photographic survey of galaxies.
1657 Roemera, provisional designation 1961 EA, is a stony asteroid from the inner regions of the asteroid belt, approximately 8 kilometers in diameter.
 It was discovered on 6 March 1961, by Swiss astronomer Paul Wild at Zimmerwald Observatory near Bern, Switzerland, and later named after American astronomer Elizabeth Roemer.
Walter Augustin Villiger (1872–1938; his first name is sometimes spelt Walther) was a Swiss astronomer and Carl Zeiss engineer who discovered an asteroid while was working in Munich, Germany.
 He also participated in the observation of comets.

Question: SN 1961V was first identified by a Swiss astronomer born in what year?
Answer: 1898