within ~100Gm of Neptune on 5290-07-07. [2009-04-23]. (原始内容存档于2010-09-19). (Solex 10) Wilson PD, Sagan C, Thompson WR. The organic surface of 5145 Pholus:
[2009-04-26]. (Solex 10) (页面存档备份,存于互联网档案馆) Three clones of Centaur 8405 Asbolus making passes within 450Gm. [2009-05-02]. [失效連結] (Solex 10) Archived 2009-04-29