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External links
- MPEC 2004-D09 announcing the discovery
- MPEC 2004-D13 correcting MPEC 2004-D09
- Chad Trujillo's page on 2004 DW
- Orcus of the Outer Solar System, Astronomy Picture of the Day, 25 March 2009
- New world found far beyond Pluto, David Whitehouse, BBC News, 3 March 2004
- A New Kuiper Belt Giant, Stuart Goldman, Sky & Telescope, 24 February 2004