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168P/Hergenrother

168p-hergenrother.jpg
168P/Hergenrother during its 2012 outburst. By Mount Lemmon Observatory.

Discovery
Discovered by Carl W. Hergenrother
Discovery date November 22, 1998
Alternative
designations		 P/1998 W2
P/2005 N2
Orbital characteristics A
Epoch March 6, 2006
Aphelion 5.839 AU
Perihelion 1.426 AU
Semi-major axis 3.632 AU
Eccentricity 0.6075
Orbital period 6.923 a
Inclination 21.8934°
Last perihelion October 1, 2012[1]
November 2, 2005
Next perihelion August 5, 2019[2][3]

168P/Hergenrother is a periodic comet in the solar system. The comet originally named P/1998 W2 returned in 2005 and got the temporary name P/2005 N2.[4]


The comet came to perihelion on 1 October 2012,[1] and was expected to reach about apparent magnitude 15.2, but due to an outburst the comet reached apparent magnitude 8.[5] 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.[6] On 19 October 2012, images by the Virtual Telescope Project showed a dust cloud trailing the nucleus.[7] Images by the 2 m (79 in) Faulkes Telescope North on 26 October 2012 confirm a fragmentation event.[8] 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.[9]


168P comes to perihelion on August 5, 2019,[2] when it will only be 76 degrees from the Sun.





References





  1. ^ ab Syuichi Nakano (2009-04-23). "168P/Hergenrother (NK 1778)". OAA Computing and Minor Planet Sections. Retrieved 2012-02-20..mw-parser-output cite.citation{font-style:inherit}.mw-parser-output .citation q{quotes:"""""""'""'"}.mw-parser-output .citation .cs1-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/6/65/Lock-green.svg/9px-Lock-green.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .citation .cs1-lock-limited a,.mw-parser-output .citation .cs1-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/d/d6/Lock-gray-alt-2.svg/9px-Lock-gray-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .citation .cs1-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/a/aa/Lock-red-alt-2.svg/9px-Lock-red-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration{color:#555}.mw-parser-output .cs1-subscription span,.mw-parser-output .cs1-registration span{border-bottom:1px dotted;cursor:help}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/4/4c/Wikisource-logo.svg/12px-Wikisource-logo.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output code.cs1-code{color:inherit;background:inherit;border:inherit;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;font-size:100%}.mw-parser-output .cs1-visible-error{font-size:100%}.mw-parser-output .cs1-maint{display:none;color:#33aa33;margin-left:0.3em}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration,.mw-parser-output .cs1-format{font-size:95%}.mw-parser-output .cs1-kern-left,.mw-parser-output .cs1-kern-wl-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right,.mw-parser-output .cs1-kern-wl-right{padding-right:0.2em}


  2. ^ ab "168P/Hergenrother Orbit". Minor Planet Center. Retrieved 2014-06-20.


  3. ^ Syuichi Nakano (2012-07-17). "168P/Hergenrother (NK 2283)". OAA Computing and Minor Planet Sections. Retrieved 2012-10-13.


  4. ^ IAUC 8560: recovery of comet P/1998 W2


  5. ^ Seiichi Yoshida (2012-02-21). "168P/Hergenrother (2012)". Seiichi Yoshida's Comet Catalog. Retrieved 2012-02-25.


  6. ^ Math: (1005)15.2−8≈758{displaystyle ({sqrt[{5}]{100}})^{15.2-8}approx 758}


  7. ^ Gianluca Masi (October 19, 2012). "Comet 168P/Hergenrother: hi-res images (19 Oct. 2012)". Virtual Telescope Project. Retrieved 2016-10-18.


  8. ^ 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.


  9. ^ Phil Plait (2012-11-05). "Breaking up is easy to do. If you're a comet". Bad Astronomy. Retrieved 2012-11-05.




External links




  • 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)


  • Temporal Correlation Between Outbursts and Fragmentation Events of Comet 168P/Hergenrother (arXiv:1409.7641 : 26 Sep 2014)












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