# Fitzsimmons 2018: Spectroscopy and thermal modelling of the first interstellar object 1I/2017 U1 'Oumuamua

> Alan Fitzsimmons, Colin Snodgrass, Ben Rozitis et al., 2018. 4 records on Mysteries Department cite it. The surface composition evidence and the mantle…

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# Spectroscopy and thermal modelling of the first interstellar object 1I/2017 U1 'Oumuamua

Alan Fitzsimmons, Colin Snodgrass, Ben Rozitis et al., 2018. _Nature Astronomy_.

Optical spectra from the William Herschel and Palomar telescopes showing a featureless red slope, and a thermal model showing that an insulating, organic-rich mantle half a metre thick could have kept interior ices from sublimating during the perihelion passage. Nature Astronomy 2, 133-137.

**1I/'Oumuamua** Articledoi: **[10.1038/s41550-017-0361-4](https://doi.org/10.1038/s41550-017-0361-4)** Checked against the original0

## What it's used for here

The surface composition evidence and the mantle argument used by several later explanations.

## Cited by on this site 4 records

[An ordinary comet-like planetesimal of water ice and dust under an insulating organic crust (with or without…](https://mysteriesdept.com/mysteries/oumuamua/answers/ANS0CSKC95T4XTH/an-ordinary-comet-like-planetesimal-of-water-ice-and-dust)

Answer

ANS

[The red featureless spectrum fits an organic-rich mantle half a metre thick that could have kept interior ice…](https://mysteriesdept.com/mysteries/oumuamua/evidence/EVD0CSKC9DM58PB/the-red-featureless-spectrum-fits-an-organic-rich-mantle)

Evidence

EVD

[1I/'Oumuamua](https://mysteriesdept.com/mysteries/oumuamua)

The mystery article

MYS

[What was 'Oumuamua made of?](https://mysteriesdept.com/mysteries/oumuamua/questions/QST0CSKBZN458NQ/what-was-oumuamua-made-of)

Question

QST

## Cite it

```
Fitzsimmons, A., Snodgrass, C., Rozitis, B., Yang, B., Hyland, M., Seccull, T., Bannister, M. T., Fraser, W. C., Jedicke, R., & Lacerda, P. (2018). Spectroscopy and thermal modelling of the first interstellar object 1I/2017 U1 'Oumuamua. Nature Astronomy. https://doi.org/10.1038/s41550-017-0361-4
```

[Read it free at doi.org](https://doi.org/10.1038/s41550-017-0361-4)

Key

**SRC** 0CSKB2BM5AXE

Kind

Journal article

Rights

The publisher's

Kept

27 Oct 2026, for editors

Checked

Against the published article

Added by

[apollo](https://mysteriesdept.com/u/apollo)

The record

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