(formerly Strabo G)
- Apollo 16's Hasselblad AS16-121-19445 could be the only Apollo-related color photograph on which the northern crater Hayn was captured. It (Hayn) is visible near the frame's upper right corner (slightly to the right of the partially depicted dark Mare Humboldtianum).
- Research: Danny Caes
- Depth data from Kurt Fisher database
- Westfall, 2000: 4.48 km
- Cherrington, 1969: 3.59 km
- Measures on LRO QuickMap give max depth about 4 km
- Measures on LRO QuickMap give central peak height 1.2 km
- Central peak composition: GNTA1 & GNTA2 (Tompkins & Pieters, 1999)
- Included in ALPO list of bright ray craters
- Crater count age of 964 million years (Shirley and others, 2012)
The Hayn-Bel'kovich Shadow
- Hayn and Bel'kovich are two craters near the moon's northeastern limb, and curiously enough, there's a black shadow in (or near?) these craters when it's about two days before Full Moon, which is too soon to be part of the eastern limb's evening terminator! (observed by Danny Caes during the night of march the 3th, 1996)(there was Full Moon on march the 5th) (the same phenomenon was observed on january the 3th, 2015)(Full Moon on the 5th). - DannyCaes Jan 5, 2015
- Named for Friedrich Karl Hayn (1863-1928), a German astronomer.
- Name given by Arthur and Whitaker in Rectified Lunar Atlas (1963) and approved by IAU in 1964 (Whitaker, 1999, p234).
- Rima Hayn A or Rupes Hayn A (two unofficial names for the pronounced rille (?) or scarp (?) on the floor of Hayn A): http://bit.ly/2CfpUuI
- Hayn, F. 1906. Selenographische Koordinaten. Volume 27 of Abhandlungen der Mathematisch-Physischen Klasse der Königlich Sächsischen Gesellschaft der Wissenschaften. B. G. Teubner, Leipzig. (Google books)
- Crater Size Frequency Distribution Measurements at the CBVC (2012) Shirley and others. 43rd LPSC #2792.