Honorary Membership was limited to 10 from 1890-1900, and to 15 from 1901 onwards. Corresponding Membership was a lesser class of Honoris causa membership in the early years. A few honorary members, such as Barnard, were first made corresponding members for a short time before being recommissioned as honorary members.
Nation(s) |
Start | End | |
|---|---|---|---|
| Joy, Dr. Alfred H. | USA | 1961 | 1973 |
| Crawford, Dr. David L. | USA | 1997 | 2024 |
| Harrison, Mr. Henry | USA | 1913 | 1929 |
| Bowen, Dr. Ira S. | USA | 1956 | 1973 |
| Sandage, Dr. Allan R. | USA | 1975 | 2010 |
| Holden, Dr. Edward S. | USA | 1891 | 1914 |
| Schwarzschild, Dr. Martin | USA | 1963 | 1999 |
| Keeler, Dr. James Edward | USA | 1895 | 1900 |
| Shoemaker, Carolyn | USA | 2003 | 2021 |
| Pasachoff, Dr. Jay M. | USA | 2003 | 2022 |