Frozen to death? Detection of comet Hale-Bopp at 30.7 AU

@article{Szabo2011FrozenTD,
  title={Frozen to death? Detection of comet Hale-Bopp at 30.7 AU},
  author={Gyula M. Szab'o and Kriszti'an S'arneczky and L{\'a}szl{\'o} L. Kiss},
  journal={Astronomy and Astrophysics},
  year={2011},
  volume={531}
}
Comet Hale--Bopp (C/1995 O1) has been the single most significant comet encountered by modern astronomy, still having displayed significant activity at 25.7 AU solar distance in late 2007. It is a puzzling question when and where this activity will finally cease. Here we present new observations with the ESO 2.2m telescope at La Silla to check the activity of Hale--Bopp at 30.7 AU solar distance. On 2010-12-04, 26 CCD images were taken with 180 s exposure times for photometry and morphology… 

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