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Spitzer Observations of Interstellar Object 1I/'Oumuamua
David E. Trilling, Michael Mommert, Joseph L. Hora et al., 2018. The Astronomical Journal.
A 30.2-hour Spitzer integration at 4.5 microns on 21-22 November 2017 did not detect the object: a 3-sigma flux limit of 0.3 microjanskys, an effective diameter below 98, 140 or 440 m depending on the thermal model, an albedo above 0.2, 0.1 or 0.01, and upper limits on CO2, CO and dust production lower than any before. AJ 156, 261.
What it's used for here
The size and outgassing limits that every composition hypothesis has to satisfy.
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Trilling, D. E., Mommert, M., Hora, J. L., Farnocchia, D., Chodas, P., Giorgini, J., Smith, H. A., Carey, S., Lisse, C. M., Werner, M., McNeill, A., Chesley, S. R., Emery, J. P., Fazio, G., Fernandez, Y. R., Harris, A., Marengo, M., Mueller, M., Roegge, A., Smith, N., Weaver, H. A., Meech, K., & Micheli, M. (2018). Spitzer Observations of Interstellar Object 1I/'Oumuamua. The Astronomical Journal. https://doi.org/10.3847/1538-3881/aae88f
@article{trilling2018spitzer,
author = {Trilling, David E. and Mommert, Michael and Hora, Joseph L. and Farnocchia, Davide and Chodas, Paul and Giorgini, Jon and Smith, Howard A. and Carey, Sean and Lisse, Carey M. and Werner, Michael and McNeill, Andrew and Chesley, Steven R. and Emery, Joshua P. and Fazio, Giovanni and Fernandez, Yanga R. and Harris, Alan and Marengo, Massimo and Mueller, Michael and Roegge, Alissa and Smith, Nathan and Weaver, Harold A. and Meech, Karen and Micheli, Marco},
title = {Spitzer Observations of Interstellar Object 1I/'Oumuamua},
journal = {The Astronomical Journal},
year = {2018},
doi = {10.3847/1538-3881/aae88f},
url = {https://doi.org/10.3847/1538-3881/aae88f}
}TY - JOUR TI - Spitzer Observations of Interstellar Object 1I/'Oumuamua AU - Trilling, David E. AU - Mommert, Michael AU - Hora, Joseph L. AU - Farnocchia, Davide AU - Chodas, Paul AU - Giorgini, Jon AU - Smith, Howard A. AU - Carey, Sean AU - Lisse, Carey M. AU - Werner, Michael AU - McNeill, Andrew AU - Chesley, Steven R. AU - Emery, Joshua P. AU - Fazio, Giovanni AU - Fernandez, Yanga R. AU - Harris, Alan AU - Marengo, Massimo AU - Mueller, Michael AU - Roegge, Alissa AU - Smith, Nathan AU - Weaver, Harold A. AU - Meech, Karen AU - Micheli, Marco PY - 2018 JO - The Astronomical Journal DO - 10.3847/1538-3881/aae88f UR - https://doi.org/10.3847/1538-3881/aae88f ER -
Trilling, David E. et al.. “Spitzer Observations of Interstellar Object 1I/'Oumuamua.” The Astronomical Journal (2018). https://doi.org/10.3847/1538-3881/aae88f.