- Hamburg, Germany1
- Hudson, Summit County, Ohio, United States1
- Indianapolis, Marion County, Indiana, United States2
- Jena, Germany4
- Leiden, Netherlands1
- Lick Observatory, Santa Clara County, California, United States108
- London, England, United Kingdom11
- Los Angeles County, California, United States56
- Los Angeles, Los Angeles County, California, United States58
- Mexico1
- Mexico City, Mexico1
- Middletown, Middlesex County, Massachusetts, United States5
- Milton, Norfolk County, Massachusetts, United States5
- Mt. Lowe, Los Angeles County, California, United States3
- Nantucket, Nantucket County, Massachusetts, United States6
- Neubabelsberg, Germany1
- New York, New York, United States1
- Orono, Penobscot County, Maine, United States1
- Paris, France1
- Pasadena, Los Angeles County, California, United States1