4003 Schumann

4003 Schumann, provisional designation 1964 ED, is a carbonaceous asteroid from the outer region of the asteroid belt, approximately 35 kilometers in diameter.

4003 Schumann

Discovery[1]
Discovered by	F. Börngen
Discovery site	Karl Schwarzschild Obs.
Discovery date	8 March 1964
Designations
MPC designation	(4003) Schumann
Named after	Robert Schumann (German composer)[2]
Alternative designations	1964 ED · 1933 FG1 1967 RK1 · 1968 UL3 1974 SE2 · 1978 GM4 1980 RH2 · 1980 TP6 1981 WV8
Minor planet category	main-belt · (outer)[1][3]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc	84.20 yr (30,753 days)
Aphelion	3.7477 AU
Perihelion	3.1040 AU
Semi-major axis	3.4258 AU
Eccentricity	0.0939
Orbital period (sidereal)	6.34 yr (2,316 days)
Mean anomaly	343.35°
Mean motion	0° 9m 19.44s / day
Inclination	5.0589°
Longitude of ascending node	189.31°
Argument of perihelion	116.48°
Physical characteristics
Dimensions	32.03 km (calculated)[3] 35.00±0.89 km[4] 36.115±0.245[5] 38.207±0.611 km[6]
Synodic rotation period	5.5984±0.0019 h[7] 5.601±0.001 h[8] 5.6040±0.0019 h[7] 5.7502±0.0007 h[9]
Geometric albedo	0.0439±0.0089[6] 0.049±0.008[5] 0.057 (assumed)[3] 0.072±0.004[4]
Spectral type	C[3]
Absolute magnitude (H)	10.80[4] · 11.1[6] · 11.154±0.003 (R)[7] · 11.186±0.002 (R)[7] · 11.2[1][3] · 11.40±0.20[10]

The asteroid was discovered on 8 March 1964, by German astronomer Freimut Börngen at the Karl Schwarzschild Observatory in Tautenburg, Eastern Germany.^[11] It was named after German composer Robert Schumann.^[2]

Orbit and classification

Schumann orbits the Sun in the outer main-belt at a distance of 3.1–3.7 AU once every 6 years and 4 months (2,316 days). Its orbit has an eccentricity of 0.09 and an inclination of 5° with respect to the ecliptic.^[1] The first precovery was obtained at Heidelberg Observatory in 1933, extending the asteroid's observation arc by 31 years prior to its discovery.^[11]

Physical characteristics

Schumann has been characterized as a dark C-type asteroid.^[3]

Diameter and albedo

According to the space-based surveys carried out by the Japanese Akari satellite and NASA's Wide-field Infrared Survey Explorer with its NEOWISE mission, Schumann's surface has an albedo of 0.04 and 0.07, and an estimated diameter of 35.0 and 38.2 kilometers, respectively.^[4][5][6] The Collaborative Asteroid Lightcurve Link assumes a standard albedo for carbonaceous bodies of 0.057, and calculates a diameter of 32.0 kilometers.^[3]

Rotation period

Several photometric lightcurves of Schumann gave a rotation period between 5.60 and 5.75 hours with a brightness amplitude in the range of 0.20 to 0.23 in magnitude (U=3-/2+/2).^[9][8][7]

Naming

This minor planet was named in honor of German composer of the Romantic era, Robert Schumann (1810–1856), known for his Lieder, chamber works and cello concerti. He was born in Zwickau, in proximity to the discovering observatory in Tautenburg.^[2] The official naming citation was published by the Minor Planet Center on 20 May 1989 (M.P.C. 14634).^[12]