Spitzer Space Telescope observations of bilobate comet 8P/TuttleO. Groussin, P. L. Lamy, M. S. P. Kelley, I. Toth, L. Jorda, Y. R. Fernández and H. A. WeaverA&A, 632 (2019) A104DOI: https://doi.org/10.1051/0004-6361/201936458