Assertion: asteroid | /r/HasProperty | unobservable
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Source sentences:
text: Similarly, asteroid 30825 (1990 TG 1 ) transited on April 14, 2005 but was again unobservable, having an angular diameter of about 0.05″, and 2101 Adonis transited on September 24, 2007 with an even smaller angular diameter of only 0.005″.