|Discovered by||Carl W. Hergenrother|
|Discovery date||November 22, 1998|
|Orbital characteristics A|
|Epoch||March 6, 2006|
|Semi-major axis||3.632 AU|
|Orbital period||6.923 a|
|Last perihelion||October 1, 2012
November 2, 2005
|Next perihelion||August 5, 2019|
The comet came to perihelion on 1 October 2012, and was expected to reach about apparent magnitude 15.2, but due to an outburst the comet reached apparent magnitude 8. As a result of the outburst of gas and dust, the comet was briefly more than 500 times brighter than it would have been without the outburst. Images by the 2 m (79 in) Faulkes Telescope North on 26 October 2012 confirm a fragmentation event. The secondary fragment was about magnitude 17. Further observations by the 8.1 m (320 in) Gemini telescope show that the comet fragmented into at least 4 parts.
- Syuichi Nakano (2009-04-23). "168P/Hergenrother (NK 1778)". OAA Computing and Minor Planet Sections. Retrieved 2012-02-20.
- Syuichi Nakano (2012-07-17). "168P/Hergenrother (NK 2283)". OAA Computing and Minor Planet Sections. Retrieved 2012-10-13.
- IAUC 8560: recovery of comet P/1998 W2
- Seiichi Yoshida (2012-02-21). "168P/Hergenrother (2012)". Seiichi Yoshida's Comet Catalog. Retrieved 2012-02-25.
- Giovanni Sostero, Nick Howes & Ernesto Guido (October 26, 2012). "Splitting event in comet 168P/Hergenrother". Remanzacco Observatory in Italy – Comets & Neo. Retrieved 2012-10-28.
- Phil Plait (2012-11-05). "Breaking up is easy to do. If you’re a comet.". Bad Astronomy. Retrieved 2012-11-05.
- Orbital simulation from JPL (Java) / Horizons Ephemeris
- 168P on Seiichi Yoshida's comet list
- Elements and Ephemeris for 168P/Hergenrother – Minor Planet Center
- 168P at Kronk's Cometography
- Comet 168P Hergenrother in outburst (Google+ chat archive Oct 12, 2012)
- Comet Hergenrother in Outburst (Carl Hergenrother : 20 Oct 2012)
- Comet 168P and fragment as seen by Kitt Peak WIYN 3.5-metre (140 in) on 30 Oct 2012
- Scientists Monitor Comet Breakup (168P-Hergenrother was imaged by the NOAO/Gemini telescope Nov. 2, 2012)
|Periodic comets (by number)|
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