Discovered by K. Reinmuth MPC designation 1334 Lundmarka Minor planet category main-belt · (outer) Absolute magnitude 10.3 Discoverer Karl Wilhelm Reinmuth | Discovery date 16 July 1934 Alternative names 1934 OB Discovered 16 July 1934 Orbits Sun Asteroid group Asteroid belt | |
Discovery site Landessternwarte Heidelberg-Königstuhl Similar 1862 Apollo, Sun, 1419 Danzig, 1056 Azalea, 1111 Reinmuthia | ||
1334 Lundmarka, provisional designation 1934 OB, is a carbonaceous asteroid from the outer region of the asteroid belt, approximately 30 kilometers in diameter. It was discovered on 16 July 1934, by German astronomer Karl Reinmuth at Heidelberg Observatory in southern Germany.
Lundmarka is classified as C-type and X-type asteroid by the LCDB and Pan-STARRS, respectively. It orbits the Sun at a distance of 2.6–3.2 AU once every 4 years and 12 months (1,816 days). Its orbit has an eccentricity of 0.10 and an inclination of 11° with respect to the ecliptic. No precoveries were taken prior to its official discovery observation.
A rotational light-curve of Lundmarka was obtained from photometric observations made at the Australian Oakley Southern Sky Observatory (E09) in September 2014. The light-curve gave a rotation period of 7000625000000000000♠6.250±0.003 hours with a brightness variation of 0.70 in magnitude (U=3-). In March 2016, a second period was published based on data from the Lowell Photometric Database. Using light-curve inversion and convex shape models, as well as distributed computing power and the help of individual volunteers, a period of 7000625033000000000♠6.25033±0.00001 hours was derived from the database's sparse-in-time photometry data (U=n.a.).
According to the surveys carried out by the Infrared Astronomical Satellite (IRAS) and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Lundmarka measures 29.8 and 27.6 kilometers in diameter, respectively, and its surface has a corresponding albedo of 0.06 and 0.24. The Collaborative Asteroid Lightcurve Link derives an intermediary albedo of 0.146 and a diameter of 30.4 kilometers.
The minor planet is named after Swedish astronomer Knut Lundmark (1889–1958), who was the head of the Lund Observatory. He thoroughly analyzed galaxies and globular clusters, and pioneered in measuring galactic distances and absolute stellar magnitudes. Lundmark also appeared in national radio with programs on popular astronomy and the history of science. The lunar crater Lundmark is also named in his honour. Naming citation was published before November 1977 (M.P.C. H 121).