# Cordiner 2020: Unusually high CO abundance of the first active interstellar comet > Martin A. Cordiner, Stefanie N. Milam, Nicolas Biver et al., 2020. 1 records on Mysteries Department cite it. 2I's composition, the only direct… Source: https://mysteriesdept.com/sources/SRC0CSKBCVJ5ZS5/unusually-high-co-abundance-of-the-first-active-interstellar Publisher: Mysteries Department Licence: CC BY 4.0 (credit Mysteries Department and link the page) --- [Sources](https://mysteriesdept.com/sources)[1I/'Oumuamua](https://mysteriesdept.com/mysteries/oumuamua)Cordiner 2020 **0** # Unusually high CO abundance of the first active interstellar comet Martin A. Cordiner, Stefanie N. Milam, Nicolas Biver et al., 2020. _Nature Astronomy_. ALMA detection of carbon monoxide and hydrogen cyanide in 2I/Borisov with a CO to water ratio far above most Solar System comets, implying formation in a very cold region. Nature Astronomy 4, 861-866. **1I/'Oumuamua** Articledoi: **[10.1038/s41550-020-1087-2](https://doi.org/10.1038/s41550-020-1087-2)** Checked against the original0 ## What it's used for here 2I's composition, the only direct measurement of an interstellar object's volatiles before 3I. ## Cited by on this site 1 record [1I/'Oumuamua](https://mysteriesdept.com/mysteries/oumuamua) The mystery article MYS ## Cite it ``` Cordiner, M. A., Milam, S. N., Biver, N., Bockelée-Morvan, D., Roth, N. X., & Bergin, E. A. (2020). Unusually high CO abundance of the first active interstellar comet. Nature Astronomy. https://doi.org/10.1038/s41550-020-1087-2 ``` [Read it free at doi.org](https://doi.org/10.1038/s41550-020-1087-2) Key **SRC** 0CSKBCVJ5ZS5 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 Bibliographic records are CC0. Take this one as CSL-JSON, BibTeX or RIS. [CSL-JSON](https://mysteriesdept.com/sources/SRC0CSKBCVJ5ZS5/unusually-high-co-abundance-of-the-first-active-interstellar/csl.json)