C/2013 US10 (Catalina)彗星观测

Catalina彗星于11月15日通过近日点,北半球观测季即将开幕,然而亮度仍然停滞,大约6.8等,但幸运的彗星经过近日点之后仍然活着,此前有研究者认为它已经瓦解并且难以通过近日点。随着逐渐靠近地球,未来亮度还稍有上升,但最大亮度估计也只能达到6等左右。

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* November 24 — Approximate date of first visibility in the dawn sky
* December 7 — Catalina gets company! The comet pairs up with the planet Venus and the waning crescent Moon this morning.
* December 23–24 — Comet crosses into Boötes
* January 1, 2016 — Close pass (0.5°) of Arcturus on the first day of 2016 * January 9 — Comet crosses into Canes Venatici
* January 12 — Closest to Earth at 66.9 million miles
* January 14 — Comet crosses into Ursa Major
* January 14–15 — Passes just 1° north of Alkaid, the star at the end of the Big Dipper’s handle
* January 16 — Passes 2° southwest of the 8th-magnitude galaxy, M101
* January 17 — Passes 3.4° northeast of the double star Mizar in the bend of the Big Dipper’s handle
* January 21 — Comet crosses into Draco
* January 25 — Comet crosses into Camelopardalis