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The Mars-crossing Asteroid that was Actually a Comet: Citizen Science and AI Reveal Activity from (446816) 2000 EE38

Authors: Naomi Morato, Colin Orion Chandler, Nima Sedaghat, William J. Oldroyd, Joseph Murtagh, Dmitrii Vavilov, Richard Wainscoat, Karen Meech, Marco Micheli, Robert Weryk, Maxwell K. Frissell, Henry H. Hsieh, Chadwick A. Trujillo, William A. Burris, Jay K. Kueny, Devanshi Singh, Jinshuo Zhang, Kennedy A. Farrell, Jarod A. DeSpain, Mark Jesus Mendoza Magbanua, Scott S. Sheppard, Michele T. Mazzucato, Milton K. D. Bosch, Tiffany Rindler, Virgilio Gonano, Al Lamperti, José A. da Silva Campos, Brian L. Goodwin, Ivan A. Terentev, Charles J. A. Dukes, Antonio Pasqua

Naomi Morato et al 2026 Research Notes of the AAS 10 .

Provider: AAS Journals

Caption: Figure 1.

2000 EE₃₈ (center) in these co-added gri-band Canada–France–Hawaii Telescope (CFHT) MegaPrime camera images (PI Richard Wainscoat, observers “QSO Team”). The field of view (FOV) is 63″× 63″, with North up and East left; arrows indicate the anti-motion (yellow) and anti-solar (red-outlined black) directions, as projected on the sky. In all images a short, diffuse tail is clearly visible oriented toward roughly 11 o’clock. (a) UT 2016 January 31, 3×60 s exposures, in gri-band summed. (b) UT 2016 March 09, 4×60 s exposures, in r-band summed. (c) UT 2016 April 01, 3×90 s exposures, in gri-band summed. (d) UT 2016 April 02, 5×120 s exposures, in gri-band summed. (e) UT 2016 April 28, 1×120 s exposure, in gri-band. (f) UT 2016 May 6, 6×120 s exposures, in gri-band sigma-clipped co-addition.

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