Discovered by O. Struve Discovery date 24 October 1922 Aphelion 3.6381 AU (544.25 Gm) | Discovery site Williams Bay Observation arc 80.10 yr (29255 days) | |
Alternative names 1922 NB, 1949 PF, 1950 WG, 1953 GT1, 1975 EE6 | ||
991 McDonalda is a Themistian asteroid. It was discovered by Otto Struve in 1922 at the Yerkes Observatory in Williams Bay, Wisconsin, United States. It is named after the McDonald Observatory, which Struve helped found in 1939.
References
991 McDonalda Wikipedia(Text) CC BY-SA