We’ve had 3 days of learning and sprinting. Here are some of the key results from the meeting.
Andy Rivkin – thoughts about filters for LSST asteroid taxonomy. If you only have 3 out of 4 filters; gri is pretty good if precision is high; grz is okay on average; Sloan filters are not the same as LSST
Josef Durech – experimented with code to get shapes, spin poles, and colors. Took ATLAS data (3 years of data) and took only 50 points (SNR>30) in 2 colors covering a range of phase angles, recovered correct period, color, shape, and spin pole.
Mario Juric – developed updated scheme (data model) for LSST Solar System Data Products and getting reading for DM (Data Management) to implement. For first year, could assume same phase curve slope for all colors. Collaboration Workspace worked well (LSST stack installed already for SSSC Spring Jupyter Hub).
Kat Volk – Toy model of resonant TNO populations and how the North Ecliptic Spur to work. For 2:1 resonance, leading and trailing islands. In baseline sims, 300-500 detected. Without NES, lose much more in leading island than in trailing island; e.g., detections down to 420 and 120. This is ~best case resonance, other resonances will be even more strongly unbalanced.
David Gerdes – DECam Solar System Survey ideas for survey proposal due. Focused on science, but LSST testbed too. Deep TNO survey (26 maybe 26.5 with shift-and-stack), focus on Neptune Trojans; 300 colors / light curves for MBAs; small end size distribution. For LSST, this helps think about a mini deep drilling survey, light curves. Next steps, gather collaborators.
Wes Fraser, Audrey Thirouin, Darin Ragozzine – colors and light curves metric; hardest part is to get correct period. Use LSST cadence from OpSim and power spectrum to make sure that there is a significant peak that matches the period. If there are 30 or more points in given apparition, then the period can usually be recovered. To get resolved light-curve colors, get 30 colors in 2 filters. Number of KBOs that get light curves and colors is about 90% (H=4) on the bright end and 0% at H=8.
Chad Trujillo – outer solar system deep fields; 10, 100, or 1000 square degrees. 2 x 600s images (reaching 26.7). Factor increase of t^(q-1)/4 = ~100 in number. Will post online so others can help. Super-NES could discover ~100 times as many TNOs!
Henry Hsieh – Read the Solar System Roadmap! White paper is coming up that organizes all the things we want. Lays the groundwork for future proposals by identifying software needs and priorities in detail.
Mike Kelley – Cometary Metrics. Added cometary magnitudes; some simulated LSST observations. Jupyter Notebook. One path forward, looking for “blind spots” and “sweet spots” in orbital element space. Goal is to get LSST completeness limits for various cometary populations and writing this up in a papers. Looking at whether NES is important for main belt comets. Looking at Asteroids in Cometary Orbits.
Michael Aye – plans on creating conda package for OpenOrb
Michael Mommert – python OpenOrb, get more information for metrics (e.g., heliocentric longitude, latitude, true anomaly, etc.)
Bryce Bolin – working with Lynne and Ed Lu, simulating detection of impacting asteroids with LSST; with Josef Durech adding real shape information to generate more realistic lightcurves