This calendar offers a summary of nights on large aperture (>2m) facilities allocated to observers who study near-Earth objects. This is by no means a comprehensive list, nor is it a tool for coordinating campaigns, but it does provide a means to facilitate communication between groups. If you are interested in being added to this calendar send a request to with details of your observing capabilities.

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Telescope Aperture Visible Imaging Visible Spectroscopy Near-IR Spectroscopy
Field of View Filters Astrometry Limit Light Curve Limit Range Mag. Limit Range Mag. Limit
Lowell DCT 4.3m 12.3' x 12.3' UBVRI, ugriz, VR V~24 V~22 0.4 - 1.0 μm V~19.5 0.8 - 2.4 μm
Lowell Perkins 1.9m 13.65' x 13.65' UBVRI, VR V~22 V~19 0.35 - 0.95 μm
SOAR 4m 7.2' circle UBVRI, griz V~24 V~21 0.4 - 0.95 μm V~19.5
APO 3.5m 7.5' x 7.5' SDSS r V~23 V~19 0.26 - 0.98 μm V~19
NASA IRTF 3m 1' x 1' open V~19 0.75 - 2.5 μm V~19
Kitt Peak Mayall 4m 36' x 36' UBVRI, wh V~24 V~21
UH 2.2m 7.5' x 7.5' UBVRIz 0.4 - 0.9 μm ~18