842 Kerstin

It was discovered on 1 October 1916, by German astronomer Max Wolf at the Heidelberg-Königstuhl State Observatory in southwest Germany.

[1] The assumed C-type asteroid has a rotation period of 18.7 hours and measures approximately 41 kilometers (25 miles) in diameter.

[3] Kerstin is a non-family asteroid of the main belt's background population when applying the hierarchical clustering method to its proper orbital elements.

All of these asteroids have low numbers between 164 Eva and 1514 Ricouxa and were discovered between 1876 and the 1930s, predominantly by astronomers Auguste Charlois, Johann Palisa, Max Wolf and Karl Reinmuth.

It showed a sidereal period of 18.716±0.002 hours (U=2), and gave a spin axis at (18.0°, 78.0°) in ecliptic coordinates (λ, β).