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APO and the Adler Planetarium

Mark Hammergren APO 20th Anniversary Celebra;on May 13, 2014

1939 poster


Adler Research and Outreach
· Twilight observing during extended evening hours (ended mid2000s), observing classes · Two major research programs:
­ Star forma;on (led by Grace WolfChase) ­ Confirma;on of basal;c asteroids (led by Mark Hammergren)
Molinari 11


NearEarth Object Followup and Characteriza;on with ARC 3.5m
· Two year, $1.3M grant from NASA NearEarth Object Observa;ons (ROSES 2013) · Lease 17% share of 3.5m (ex U Chicago) · Frequent, brief sessions for astrometric follow up · Regularly scheduled halfnights, and infrequent TargetofOpportunity runs on highpriority targets, for physical characteriza;on


Why NEOs?




Resources, not just hazards


Public Law No. 109155, enacted 2005 (part of NASA Authoriza;on Act of 2005)


NASA Asteroid Redirect Mission


ARC 3.5m telescope: a uniquely capable facility
· Remote observing · (par;al night and ToO scheduling) · Full, rapidswap suite of instrumenta;on · Rela;vely large aperture (for asteroid work)


· SPIcam, DIS, ARCTIC imaging
­ Astrometric followup, mul;color photometry

· DIS, TripleSpec
­ Reflectance spectroscopy (surface mineral comp.)

· Agile high speed imager
­ Rota;onal lightcurves (rota;on rate; tumbling?)



NEO 2013 JC, g ~ 22.6, r ~ 23.0 1 x 5 minute exposure with DIS


NEO 2013 JM22, predicted V~17.6 1 x 20 minute exposure with DIS (lowres)