3200 Phaethon discovery, several other objects were found exhibiting mixed cometary and asteroidal features, such as 133P/Elst–Pizarro. Shortly after its discovery, Fred Whipple observed that the "orbital elements of 1983 TB shown on IAUC 3879 are virtually coincident with the mean orbital elements of 19 Geminid meteors photographed with the super-Schmidt meteor cameras". In other words, Phaethon is the long-sought parent body of the Geminids meteor shower of mid-December. Phaethon approached to of Earth on December 10, 2007, and was detected by radar at Arecibo. When Phaethon came to perihelion in July 2009, it was found to be brighter than expected. During
December Hydrids (December 4–15), and the Ursids (December 17-to December 25/26, peaking around December 22). "This list does not necessarily imply either official status or general observance." Last Week of November: November 25 – December 1 First Sunday: December 2 Fourth Sunday before Christmas Day: December 2 First Monday in December and following 7 days: December 3-9 First Friday: December 7 Sunday two weeks before Christmas: December 9 Second Monday: December 10 December 15, unless the date falls on a Sunday, then December 16: December 15 Second-final Sunday before Christmas Day: December 16 Thursday before Christmas: December 20 Winter Solstice: December