However, the value measured in a short-period comet
, 103P/Hartley 2, has a very Earth-like value.
Virtually any short-period comet
among the 100 or so not currently coming near the Earth could become dangerous after a close passage by Jupiter.
If this notion is correct, these asteroids should have the same dark surfaces typical of short-period comet
Halley Schmidt, 15-year-old amateur astronomer, was named after the famous short-period comet
by her astronomer parents, Linda and Theo.
It was the first short-period comet
known and, indeed, to this day no comet has been discovered with a smaller orbit.
The convention is to call a comet with a period less than 200 years a short-period comet
, and one with a period longer than 200 years a long-period comet.
Marsden, appeared on MPEC 2000-Y47, together with orbital elements showing it to be a short-period comet
Dr Miles opened by summarising the physical characteristics of comet 17P/Holmes, explaining that it was a short-period comet
of the Jupiter family.
Identification of a new short-period comet
near the Sun', A&A, 445, 759 (2006)
They originate from the unusually short-period comet
2P/Encke and other objects that seem to be ancient Encke breakup products, including the dormant, asteroid-like comet 2004 [TG.
These originate from the asteroid-like object 2003 EH1, a dormant Jupiter-family short-period comet
that suff ered a breakup about 500 years ago.
How could a naked-eye short-period comet
go undiscovered until just 24 years ago?