Discovered by K. Reinmuth MPC designation 1818 Brahms Orbital period 1,163 days Orbits Sun Asteroid group Asteroid belt | Discovery date 15 August 1939 Minor planet category main-belt · (inner) Discovered 15 August 1939 Discoverer Karl Wilhelm Reinmuth | |
Alternative names 1939 PE · 1936 TF1955 SU · 1955 TN1955 UC · A904 RE Discovery site Landessternwarte Heidelberg-Königstuhl Similar 1862 Apollo, Sun, 1419 Danzig, 1056 Azalea, 1111 Reinmuthia | ||
1818 Brahms, provisional designation 1939 PE, is an asteroid from the inner regions of the asteroid belt, approximately 6 kilometers in diameter. It was discovered on 15 August 1939, by German astronomer Karl Reinmuth at Heidelberg Observatory in southern Germany.
Brahms orbits the Sun at a distance of 1.8–2.6 AU once every 3 years and 2 months (1,162 days). Its orbit has an eccentricity of 0.18 and an inclination of 3° with respect to the ecliptic. Brahms was first identified as A904 RE at the discovering observatory in 1904, extending the body's observation arc by 35 years prior to its official discovery observation.
As of 2017, Brahms effective size, albedo and spectral type, as well as its rotation period and shape remain unknown. Based on a magnitude-to-diameter conversion, its generic diameter is between 5 and 11 kilometer for an absolute magnitude of 13.8, and an assumed albedo in the range of 0.05 to 0.25. Since asteroids in the inner main-belt are typically of stony rather than carbonaceous composition, with albedos of 0.20 or higher, Brahms's diameter can be estimate to measure around 6 kilometers, as the higher its albedo (reflectivity), the lower the body's diameter at a constant absolute magnitude (brightness).
This minor planet is named for the German composer Johannes Brahms (1833–1897). Naming citation was published before November 1977 (M.P.C. 3935).