SIMBAD references

In an attempt to find correlations between properties of comets, we determine the dust colors, dust release rates, and dust-to-gas mass ratios in the comae of Comets Bowell (1980b=1982I), Bradfield (1979l=1979X), Brorsen-Metcalf (1989o=1989X), Giacobini-Zinner (1984e=1985XIII), Levy (1990c=1990XX), and Stephan-Oterma (1980g=1980X) using a uniform and systematic analysis of the continuum fluxes measured at optical wavelengths. We assume that the continuum fluxes observed in these comets are from light scattered by micrometer-sized dust particles. The color of the dust is blue, relative to the Sun, in Comets Bradfield (1979 X) and Brorsen-Metcalf (1989 X); both comets have a low dust-to-gas mass ratio (χ<10%). Comets Giacobini-Zinner (1985 XIII) and Stephan-Oterma (1980 X) have an intermediate dust-to-gas mass ratio (10%<χ<40%), whereas Comets Levy (1990 XX) and Bowell (1982 I) have a high dust-to-gas mass ratio (χ> 40%). The continuum flux from dust particles in comets with intermediate to high dust-to-gas mass ratios is in general red, relative to the Sun. However, the color changes to blue in these comets when the dust-to-gas mass ratios are low relative to their peak values.