869 Mellena

869 Mellena
Discovery [1]
Discovered byR. Schorr
Discovery siteBergedorf Obs.
Discovery date9 May 1917
Designations
(869) Mellena
Named after
Werner von Melle
(mayor of Hamburg)[2]
A917 JB · 1931 RC
1944 OB · 1952 DL2
1917 BV
main-belt [1][3] · (middle)
background [4][5]
Orbital characteristics [3]
Epoch 31 May 2020 (JD 2459000.5)
Uncertainty parameter 0
Observation arc102.66 yr (37,496 d)
Aphelion3.2807 AU
Perihelion2.0966 AU
2.6887 AU
Eccentricity0.2202
4.41 yr (1,610 d)
90.376°
0° 13m 24.96s / day
Inclination7.8385°
154.88°
107.09°
Physical characteristics
  • 18.45±0.32 km[6]
  • 18.52±0.8 km[7]
  • 21.193±0.090 km[8]
6.5155±0.0005 h[9]
  • 0.0565±0.005[7]
  • 0.057±0.022[8]
  • 0.058±0.002[6]
11.9[1][3]

869 Mellena (prov. designation: A917 JB or 1917 BV) is a dark background asteroid from the central region of the asteroid belt. It was discovered on 9 May 1917, by astronomer Richard Schorr at the Bergedorf Observatory in Hamburg.[1] The carbonaceous C-type asteroid has a shorter than average rotation period of 6.5 hours and measures approximately 19 kilometers (12 miles) in diameter. It was named after Werner von Melle (1853–1937), mayor of Hamburg, who founded the discovering observatory.[2]

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