894 Erda

894 Erda
Discovery [1]
Discovered byM. F. Wolf
Discovery siteHeidelberg Obs.
Discovery date4 June 1918
Designations
(894) Erda
Named after
Erda, goddess in Wagner's Der Ring des Nibelungen
(Norse mythology)[2]
A918 LA · 1973 QB
A907 JC · 1907 JC
A912 HD · 1912 HD
1918 DT
main-belt [1][3] · (outer)
background [4][5]
Orbital characteristics [3]
Epoch 31 May 2020 (JD 2459000.5)
Uncertainty parameter 0
Observation arc112.73 yr (41,173 d)
Aphelion3.4642 AU
Perihelion2.7752 AU
3.1197 AU
Eccentricity0.1104
5.51 yr (2,013 d)
150.20°
0° 10m 44.04s / day
Inclination12.733°
190.61°
116.33°
Physical characteristics
  • 28.309±1.544 km[6]
  • 36.54±1.8 km[7]
  • 37.84±0.45 km[8]
4.6897±0.0003 h[9]
  • 0.2300±0.025[7]
  • 0.232±0.007[8]
  • 0.319±0.060[6]
X (S3OS2)[5][10]
9.7[1][3]

894 Erda (prov. designation: A918 LA or 1918 DT) is a bright background asteroid from the outer regions of the asteroid belt. It was discovered on 4 June 1918, by German astronomer Max Wolf at the Heidelberg-Königstuhl State Observatory.[1] The X-type asteroid has a short rotation period of 4.7 hours and measures approximately 37 kilometers (23 miles) in diameter. It was likely named after a character in Wagner's Der Ring des Nibelungen, "Erda", who is the goddess of wisdom, fate and Earth, borrowed from the Norse sagas, and referring to both Urðr and Jörð in Norse mythology.[2]

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  10. ^ Cite error: The named reference Lazzaro-2004 was invoked but never defined (see the help page).