Keenan 2007, Defence of planetary conjunctions for early Chinese chronology is unmerited, Journal of Astronomical History and Heritage 10(2): 142-147 (answers Pankenier 2007; says 1576 BC was a four-planet gathering)
How it connects
This book or paper is where we read about
1576 BC: all five planets within 26 degrees, but only 4 degrees from the Sun (unseeable); what could be seen in late December was four planets within 4.4 degrees