- ^ H-6 text_all.word Archived November 2, 2004, at the Wayback Machine
| Feature type | Catena |
|---|---|
| Coordinates | 4°42′N 46°12′W / 4.7°N 46.2°W / 4.7; -46.2 |
| Eponym | Haystack Observatory |
Haystack Catena (Haystack Vallis until March 2013) is a catena at 4.7° N, 46.2° W on Mercury. It superficially resembles a graben but is a chain of overlapping secondary craters.[1] It was named after Haystack Observatory.