Origins of ACO Objects
Studies analysing the albedo distribution of a sample of asteroids in cometary orbits, found in general that they exhibit lower albedos than objects with Tj > 3 and further concluded that all ACOs in that sample with Tj < 2.6 had albedos pV < 0.075 - similar to those measured for cometary nuclei - suggesting cometary origins.
A sample of objects, which included Kridsadaporn, was used in a study of the relationship between the Jovian Tisserand invariant and spectral properties of asteroids in cometary orbits, which determined that all observed ACOs within the sample with Tj < 2.9 were feature-less. Kridsadaporn, with its Jovian Tisserand invariant of 2.858, falls within the feature-less (without bands) comet-like spectral group. These studies also concluded that ACOs with featured spectra (with bands) typical of the main belt had Tj ≥ 2.9 while those with Tj < 2.9 demonstrated comet-like spectra, suggesting that the subsample of ACOs with 2.9 ≤ Tj ≤ 3.0 could be populated by a large fraction of interlopers from the inner part of the belt.
Kridsadaporn has a perihelion distance q = 1.3224 AU. A study of the relationship between the size distribution profile and perihelion distances of ACOs concluded that a sub-sample of ACOs with a perihelion distance q > 1.3 AU had a size distribution profile similar to that of the Jupiter family comets, suggesting that sub-sample to be composed of a significant fraction of dormant comets, while a large fraction of ACOs with q < 1.3 AU could more likely be scattered objects from the outer main belt.
Objects with a Jovian Tisserand invariant Tj ≤ 3 and taxonomic properties consistent with a low albedo, however, are not enough to imply that they are dormant or extinct comets. The fraction of low albedo, Tj ≤ 3, objects actually being dormant or extinct comets is estimated to be 65% ± 10%.
Read more about this topic: 7604 Kridsadaporn
Famous quotes containing the words origins of, origins and/or objects:
“Grown onto every inch of plate, except
Where the hinges let it move, were living things,
Barnacles, mussels, water weeds—and one
Blue bit of polished glass, glued there by time:
The origins of art.”
—Howard Moss (b. 1922)
“The settlement of America had its origins in the unsettlement of Europe. America came into existence when the European was already so distant from the ancient ideas and ways of his birthplace that the whole span of the Atlantic did not widen the gulf.”
—Lewis Mumford (1895–1990)
“Though collecting quotations could be considered as merely an ironic mimetism—victimless collecting, as it were ... in a world that is well on its way to becoming one vast quarry, the collector becomes someone engaged in a pious work of salvage. The course of modern history having already sapped the traditions and shattered the living wholes in which precious objects once found their place, the collector may now in good conscience go about excavating the choicer, more emblematic fragments.”
—Susan Sontag (b. 1933)