# Jewitt 2019: Initial Characterization of Interstellar Comet 2I/2019 Q4 (Borisov)

> David Jewitt, Jane Luu, 2019. 1 records on Mysteries Department cite it. The independent characterisation of 2I.

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[Sources](https://mysteriesdept.com/sources)[1I/'Oumuamua](https://mysteriesdept.com/mysteries/oumuamua)Jewitt 2019

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# Initial Characterization of Interstellar Comet 2I/2019 Q4 (Borisov)

David Jewitt, Jane Luu, 2019. _The Astrophysical Journal Letters_.

NOT and Hubble-era photometry of 2I with a nucleus radius estimate of 0.2-0.5 km and dust production of a few kilograms per second; a cometary object in every respect. ApJL 886, L29.

**1I/'Oumuamua** Articledoi: **[10.3847/2041-8213/ab530b](https://doi.org/10.3847/2041-8213/ab530b)** Checked against the original0

## What it's used for here

The independent characterisation of 2I.

## Cited by on this site 1 record

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

The mystery article

MYS

## Cite it

```
Jewitt, D., & Luu, J. (2019). Initial Characterization of Interstellar Comet 2I/2019 Q4 (Borisov). The Astrophysical Journal Letters. https://doi.org/10.3847/2041-8213/ab530b
```

[Read it free at doi.org](https://doi.org/10.3847/2041-8213/ab530b)

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27 Oct 2026, for editors

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