"हैली धूमकेतु": अवतरणों में अंतर
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पंक्ति 27:
|author=R. R. Britt
|url=http://www.space.com/scienceastronomy/solarsystem/borrelly_dark_011129.html
|accessdate=16 दिसम्बर 2008
|archiveurl= |archivedate=30 | }}</ref> |sidereal_day = 2.2 d (52.8 h) (?)<ref name=Peale1989>{{Cite journal
|author= S. J. Peale, J. J. Lissauer
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