On a Forgotten 1836 Explosion from Halley's Comet, Reminiscent of 17P/Holmes' Outbursts

Details On a Forgotten 1836 Explosion from Halley's Comet, Reminiscent of 17P/Holmes' Outbursts On a Forgotten 1836 Explosion from Halley's Comet, Reminiscent of 17P/Holmes' Outbursts

Apr 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008icq....30...63s&link_type=abstract

International Comet Quarterly, vol. 30, p. 63-74

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Although it is often affirmed that the outbursts displayed by comet 17P/Holmes, including the megaburst of 2007, have never been observed in any other comet, I find that about ten weeks after its 1835 perihelion, comet 1P/Halley experienced a similarly massive explosion in late January 1836, at 1.44 AU from the sun, with a peak intrinsic magnitude of at least +0.3,midway between the limits on the outbursts of 17P/Holmes. Predictably, this outburst of Halley's comet accompanied the formation of a disk-shaped, sharply-bounded dust halo, which was steadily expanding at a rate of 0.575 km/s into a feature of nearly-parabolic outlines, very similar in appearance to the halos of 17P/Holmes in 1892-1893 and 2007. The 1836 episode of Halley's comet and its aftermath thus compare favorably with the 17P/Holmes events in all respects.

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