天文學家已經在荷包蛋星系發現2顆II型超新星:SN 1993R及SN 2014cy。 Filho, Mercedes E.; Barthel, Peter D.; Ho, Luis C. The Radio Properties of Composite LINER/H II Galaxies. The
1134/S1070363216020110 (英语). B. F. Plummer, Mercedes Menendez, Michael Songster. Hydration of nitriles to amides promoted by mercury(II) acetate in acetic acid. The