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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. The asteroid was named after composer Johannes Brahms.

Orbit and classification

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. 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.

Physical characteristics

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).

Naming

This minor planet is named for the German composer Johannes Brahms (1833–1897). The official naming citation was published by the Minor Planet Center on 20 February 1976 (M.P.C. 3935).

References

1. ^ "JPL Small-Body Database Browser: 1818 Brahms (1939 PE)" (2017-03-14 last obs.). Jet Propulsion Laboratory. Retrieved 8 June 2017.
2. ^ Schmadel, Lutz D. (2007). "(1818) Brahms". Dictionary of Minor Planet Names. Springer Berlin Heidelberg. p. 145. doi:10.1007/978-3-540-29925-7_1819. ISBN 978-3-540-00238-3.
3. ^ "Asteroid Size Estimator". CNEOS – NASA/JPL. Retrieved 9 November 2017.
4. ^ "1818 Brahms (1939 PE)". Minor Planet Center. Retrieved 15 December 2016.
5. Schmadel, Lutz D. "Appendix – Publication Dates of the MPCs". Dictionary of Minor Planet Names – Addendum to Fifth Edition (2006–2008). Springer Berlin Heidelberg. p. 221. doi:10.1007/978-3-642-01965-4. ISBN 978-3-642-01964-7.

External links

• Asteroid Lightcurve Database (LCDB), query form (info Archived 16 December 2017 at the Wayback Machine)
• Dictionary of Minor Planet Names, Google books
• Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
• Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
• 1818 Brahms at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 1818 Brahms at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit viewer · Orbit parameters · Physical parameters

• Minor planet object articles (numbered)
• Background asteroids
• Johannes Brahms
• Discoveries by Karl Wilhelm Reinmuth
• Named minor planets
• Astronomical objects discovered in 1939