Comet Yanaka (1988r) - A new class of carbon-poor comet

Details Comet Yanaka (1988r) - A new class of carbon-poor comet Comet Yanaka (1988r) - A new class of carbon-poor comet

Sep 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992sci...257.1926f&link_type=abstract

Science (ISSN 0036-8075), vol. 257, no. 5078, p. 1926-1929.

Astronomy and Astrophysics

Astronomy

20

Astronomical Spectroscopy, Chemical Composition, Comets, Carbon, Interstellar Matter, Solar System Evolution, Stellar Evolution

Scientific paper

As part of a program to determine the chemical composition of a sample population of comets, a very unusual comet, Yanaka (1988r), was observed in January 1989. Although the comet showed the usual emissions of OI and NH2, it did not display any hint of C2 or CN emission. The comet is depleted in C2 by at least a factor of 100 and in CN by a factor of 25 relative to typical comets. If comets originate from interstellar clouds, Yanaka (1988r) could be an interloper from a cloud of different composition. If Yanaka (1988r) was formed within our solar system, the solar nebula was less uniform than assumed by most present models of formation.

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