JPL Horizons (页面存档备份,存于互联网档案馆) Observer Location: @sun (Perihelion occurs when deldot changes from negative to positive. Uncertainty in time of perihelion is 3-sigma.)
19521 Chaos (1998 WH24). JPL Small-Body Database Browser (2007-12-14 last obs). [11 April 2016]. (原始内容存档于2018-02-10).
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Gault, Dave. 存档副本. OccultWatcher. [29 September 2023]. (原始内容存档于2023-11-14).
JPL Horizons (页面存档备份,存于互联网档案馆) Observer Location: @sun (Perihelion occurs when deldot changes from negative to positive. Uncertainty in time of perihelion is 3-sigma.)