856 Backlunda

It was discovered on 3 April 1916, by Russian astronomer Sergey Belyavsky at the Simeiz Observatory on the Crimean peninsula.

[1] The carbonaceous C-type asteroid has a rotation period of 12.1 hours and measures approximately 45 kilometers (28 miles) in diameter.

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

[9] In May 2019, an alternative period determination of 11.965±0.007 hours with an amplitude of 0.09±0.02 magnitude was made by Tom Polakis at the Command Module Observatory (V02) in Arizona (U=2).

[15] In 2016, a modeled lightcurve gave a concurring sidereal period of 12.02894±0.00005 hours using data from a large collaboration of individual observers (such as above).