Events - Scientific Events on April 21
1985 : A Mrkos discovers asteroid #5318
1933 : C Jackson discovers asteroid #1264 Letaba
1939 : C Jackson discovers asteroid #1505 Koranna
1956 : Elvis Presley's 1st hit record, "Heartbreak Hotel," becomes #1
1979 : H Debehogne discovers asteroid #4313 Bouchet
1874 : J Palisa discovers asteroid #137 Meliboea
1993 : K Endate & K Watanabe discover asteroid #6873
1901 : L Carnera discovers asteroid #470 Kilia
1950 : La Plata Observatory discovers asteroid #4756 Asaramas
1982 : M Watt discovers asteroid #2991
1995 : P Pravec & L Sarounova discover asteroid #8217
1876 : Prosper Henry discovers asteroid #162 Laurentia
1996 : R H McNaught & H Abe discover asteroid #8113