1669 Dagmar

1669 Dagmar, provisional designation 1934 RS, is a dark asteroid from the outer region of the asteroid belt, about 43 kilometers in diameter. It was discovered by German astronomer Karl Reinmuth at Heidelberg Observatory on 7 September 1934.

The asteroid is a member of the Themis family, a large group of asteroids in the outer main-belt. It has a notable G-type spectra (or Cg-type in the SMASS taxonomy), similar to 1 Ceres, the largest asteroid and only dwarf planet in the asteroid belt. Dagmar orbits the Sun at a distance of 2.8–3.5 AU once every 5 years and 7 months (2,033 days). Its orbit shows an eccentricity of 0.11 and is nearly coplanar with the plane of the ecliptic, inclined by only 1 degree. It has a provisional rotation period of 12 hours, as measured by Italian astronomer Federico Manzini at th SAS observatory in Novara. Based on the surveys carried out by IRAS, Akari, WISE/NEOWISE, its albedo lies between 0.03 and 0.06.

The asteroid was named by the discoverer after a common German feminine name. No special meaning is assigned to this name.