Williamina Fleming discovered IC 2501 = HN 101 in 1904 on a Harvard objective prism plate taken at the Arequipa station.

600/800mm - 24" (4/11/08 - Magellan Observatory, Australia): at 200x, this very compact planetary appeared as a very bright, mag 10.5 blue "star" that was slightly out of focus. Although it was barely non-stellar at this power, it was obvious by its "soft" nature and blue color that it was a planetary. Good contrast gain with a UHC filter. At 350x, IC 2501 was clearly resolved as a very small 3" disc with a crisp edge and extremely high surface brightness. Located 15' SE of mag 6.9 HD 83614.

Notes by Steve Gottlieb