It was discovered on 1 February 1916, by Danish astronomer Holger Thiele at Bergedorf Observatory in Hamburg, Germany.
[2] Stobbe orbits the Sun in the central main-belt at a distance of 2.6–2.7 AU once every 4 years and 3 months (1,540 days).
[1] In March 2009, a rotational lightcurve of Stobbe was obtained from photometric observations made by French amateur astronomer Pierre Antonini at his Observatoire de Bédoin rendered a well-defined period of 5.617±0.002 hours with a brightness variation of 0.35 in magnitude (U=3),[9] superseding a previous observation at the Roach Motel Observatory (856) in Riverside, California, that gave a period of 6.37±0.02 hours and an amplitude of 0.27 in magnitude (U=2).
[10] According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite, and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, the asteroid has an albedo of 0.11–0.14 with a corresponding diameter between 22.7 and 23.9 kilometers.
[6][7][8] The Collaborative Asteroid Lightcurve Link agrees with these results and derives an albedo of 0.113 and a diameter of 23.85 kilometers, while a study using preliminary results from NEOWISE diverges significantly from all other observations, giving a diameter of 17.4 kilometers and an albedo of 0.232.