801 Helwerthia
801 Helwerthia is a C-type asteroid orbiting in the Main belt near the Eunomia family. However, it is not a family member but an un-related interloper in the region because its composition is inconsistent with membership. Its diameter is about 33 km, its albedo around 0.038. An international team of astronomers observed this minor planet photometrically in 2012, determining a rotation period of  with an amplitude of  in magnitude. References

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000801
Discoveries by Max Wolf
Named minor planets
000801
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