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2. Hubble and Keck telescope observations of active asteroid 288P/300163 (2006 VW139);Agarwal;Astron. J.,2016
3. AstDys Catalogue (Accessed 16/02/2018), http://hamilton.dm.unipi.it/astdys/.
4. ‘COMET P/2015 PD229 (ISON-Cameron)’, Minor Planet Electronic Circulars 2016-C02;Cameron,2016
5. Discovery of cometary activity for Centaur 174P/Echeclus (60558);Choi,2006