Spitzer Observations of Interstellar Object 1I/‘Oumuamua

  title={Spitzer Observations of Interstellar Object 1I/‘Oumuamua},
  author={D. Trilling and Michael Mommert and J. Hor{\'a} and D. Farnocchia and P. Chodas and J. Giorgini and Ha Smith and S. Carey and C. Lisse and M. Werner and A. McNeill and S. Chesley and J. Emery and G. Fazio and Y. Fern{\'a}ndez and A. Harris and M. Marengo and M. M{\"u}ller and A. Roegge and N. Smith and H. Weaver and K. Meech and M. Micheli},
  journal={The Astronomical Journal},
  • D. Trilling, Michael Mommert, +20 authors M. Micheli
  • Published 2018
  • Physics
  • The Astronomical Journal
  • 1I/'Oumuamua is the first confirmed interstellar body in our solar system. Here we report on observations of 'Oumuamua made with the Spitzer Space Telescope on 2017 November 21–22 (UT). We integrated for 30.2 hr at 4.5 μm (IRAC channel 2). We did not detect the object and place an upper limit on the flux of 0.3 μJy (3σ). This implies an effective spherical diameter less than [98, 140, 440] m and albedo greater than [0.2, 0.1, 0.01] under the assumption of low, middle, or high thermal beaming… CONTINUE READING

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    Publications referenced by this paper.
    Interstellar Interloper 1I/2017 U1: Observations from the NOT and WIYN Telescopes
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    Spectroscopy and thermal modelling of the first interstellar object 1I/2017 U1 ‘Oumuamua
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    Spitzer Space Telescope Observations of the Nucleus of Comet 103P/Hartley 2
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    Implications for Planetary System Formation from Interstellar Object 1I/2017 U1 (‘Oumuamua)
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    Constraints on the Density and Internal Strength of 1I/’Oumuamua
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    Interstellar Interlopers: Number Density and Origin of ‘Oumuamua-like Objects
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