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HST Solar System Advisory Committee Report
Stefanie Milam Phil Nicholson (chair), Michele Bannister, Bonnie Burratti, Marc Buie, Jean-Luc Margot, Glenn Orton
Credit: NASA and E. Karkoschka (University of Arizona )


Who & What
· Solar-system proposals, often as high as 10% of allocated time (or number of proposals) are now only taking up 2-3%. · Ad-Hoc Committee Formed by Matt Mountain (Space Telescope Science Institute Director)
­ To explore the underlying reasons for the apparent decline in usage and to provide advice on future strategies for planetary science programs with HST and JWST.

· Primary Tasks:
1. Review the evolution of HST usage by the planetary community and match against factors such as changes in the time allocation process and in instrument capabilities; Solicit input from the community on the role that HST can play in planetary science and on methods for increasing participation by the solar system community; Investigate potential mechanisms to coordinate HST observational programs with priorities among the planetary science community.
Credit: NASA, ESA, and the Hubble Heritage Team (STScI/AURA)

2.

3.


Possibilities Raised
­ Planetary scientists are more collaborative than the astrophysics community in general, giving them a disadvantage in terms of numbers ­ Combined panels: solar-system, exoplanets and circumstellar disks reviewed together by two `mirror ' panels (established to avoid conflicts of interest) ­ Not enough expertise on panels ­ Triage bias? ­ ToO vs. DDT
Credit: Ben Zellner (Georgia Southern University), Peter Thomas (Cornell University) and NASA


Solar System Triage in Mirror Panels

Triage generally lower than average proposals.


Approval Fraction

· The overall acceptance fraction for Solar System proposals is higher than the average for all GO proposals, but the proposals generally request less than 15 orbits.


Preliminary Findings
· Possible approaches:
Campaigns, such as Shoemaker-Levy 9 Initiatives, such as the `encouragement' of UVintensive proposals in Cycle 21 (proposals engaging in `time domain' research) Support for NASA missions and Decadal External reviewers

· Community input solicited.
Contact: Stefanie.N.Milam@nasa.gov or hstsolarsys@stsci.edu
Image Credit: NASA and The Hubble Heritage Team (STScI/AURA)