1818 Brahms

From Wikipedia, the free encyclopedia
Jump to: navigation, search
1818 Brahms
Discovery [1]
Discovered by K. Reinmuth
Discovery site Heidelberg Obs.
Discovery date 15 August 1939
Designations
MPC designation (1818) Brahms
Named after
Johannes Brahms
(German composer)[2]
1939 PE · 1936 TF
1955 SU · 1955 TN
1955 UC · A904 RE
main-belt · (inner)
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc 112.50 yr (41,092 days)
Aphelion 2.5504 AU
Perihelion 1.7770 AU
2.1637 AU
Eccentricity 0.1787
3.18 yr (1,163 days)
194.32°
0° 18m 34.92s / day
Inclination 2.9782°
249.48°
74.560°
Physical characteristics
Dimensions 8±3 km (generic)[3]
13.8[1]

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,[4] the asteroid was named after composer Johannes Brahms.[2]

Orbit and classification[edit]

Brahms orbits the Sun in the inner main-belt at a distance of 1.8–2.6 AU once every 3 years and 2 months (1,163 days). Its orbit has an eccentricity of 0.18 and an inclination of 3° with respect to the ecliptic.[1] 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.[4]

Physical characteristics[edit]

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.[3] 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).[3]

Naming[edit]

This minor planet is named for the German composer Johannes Brahms (1833–1897),[2] the official naming citation was published by the Minor Planet Center before November 1977 (M.P.C. 3935).[5]

References[edit]

  1. ^ a b c d "JPL Small-Body Database Browser: 1818 Brahms (1939 PE)" (2017-03-14 last obs.). Jet Propulsion Laboratory. Retrieved 8 June 2017. 
  2. ^ a b c Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (1818) Brahms. Springer Berlin Heidelberg. p. 145. ISBN 978-3-540-00238-3. Retrieved 15 December 2016. 
  3. ^ a b c "Asteroid Size Estimator". CNEOS – NASA/JPL. Retrieved 9 November 2017. 
  4. ^ a b "1818 Brahms (1939 PE)". Minor Planet Center. Retrieved 15 December 2016. 
  5. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 15 December 2016. 

External links[edit]