CCD Photometry of the Asteroid 55 Pandora

CCD photometry of distant comets

While it is apparent that many comets are active beyond the canonical distance of 3 AU, few surveys of cometary activity have been performed in this region previously. Such a survey enables a more accurate determination of the proportion of comets that exhibit little or no outgassing at these distances. Results are presented of CCD observations of comets in the region of 3 AU ≤ Rh ≤ 6 AU obtain...

Asteroid Models from the Pan-STARRS Photometry

We present simulations on the asteroid photometric data that will be provided by the PanSTARRS (Panoramic Survey Telescope and Rapid Response System). The simulations were performed using realistic shape and light-scattering models, random orientation of spin axes, and rotation periods in the range 2–24 h. We show that physical models of asteroids can be reconstructed from this data with some l...

Spectro-photometry of Dynamically Assocaited Asteroid Pairs

Hst Photometry and Surface Mapping of Asteroid

Astronomy, University of Maryland, College Park MD 20742, ([email protected]), Joel Wm. Parker, Eliot F. Young, Dept. of Space Studies, SwRI, Boulder CO 80302, Peter. C. Thomas, Center for Radiophysics and Space Research, Cornell University, Ithaca NY 14853, Christopher T. Russell, IGPP & ESS, UCLA, Los Angeles CA 90095, S. Alan Stern, Dept. of Space Studies, SwRI, Boulder CO 80302, Mark V. Sy...

Narrowband CCD Photometry of Giant HII Regions

We have obtained accurate CCD narrow band Hβ and Hα photometry of Giant HII Regions in M 33, NGC 6822 and M 101. Comparison with previous determinations of emission line fluxes show large discrepancies; their probable origins are discussed. Combining our new photometric data with global velocity dispersion (σ) derived from emission line widths we have reviewed the L(Hβ)) − σ relation. A reanaly...