APO and the Adler Planetarium
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APO and theAdler Planetarium
Mark HammergrenAPO 20th Anniversary CelebrationMay 13, 2014
1939 poster
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Adler Research and Outreach
• Twilight observing during extended evening hours (ended mid-2000s), observing classes
• Two major research programs:– Star formation (led by Grace
Wolf-Chase)– Confirmation of basaltic
asteroids (led by Mark Hammergren)
Molinari 11
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Near-Earth Object Follow-up and Characterization with ARC 3.5-m
• Two year, $1.3M grant from NASA Near-Earth Object Observations (ROSES 2013)
• Lease 17% share of 3.5-m (ex U Chicago)• Frequent, brief sessions for astrometric follow-
up• Regularly scheduled half-nights, and infrequent
Target-of-Opportunity runs on high-priority targets, for physical characterization
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Why NEOs?
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Resources, not just hazards
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Public Law No. 109-155, enacted 2005(part of NASA Authorization Act of 2005)
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NASA Asteroid Redirect Mission
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ARC 3.5-m telescope:a uniquely capable facility
• Remote observing• (partial night and
ToO scheduling)• Full, rapid-swap suite
of instrumentation• Relatively large
aperture (for asteroid work)
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• SPIcam, DIS, ARCTIC imaging– Astrometric follow-up, multicolor photometry
• DIS, TripleSpec– Reflectance spectroscopy (surface mineral comp.)
• Agile high speed imager– Rotational lightcurves (rotation rate; tumbling?)
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NEO 2013 JC, g ~ 22.6, r ~ 23.01 x 5 minute exposure with DIS
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NEO 2013 JM22, predicted V~17.61 x 20 minute exposure with DIS (low-res)