# Seligman 2024: Two distinct populations of dark comets delineated by orbits and sizes

> Darryl Z. Seligman, Davide Farnocchia, Marco Micheli et al., 2024. 2 records on Mysteries Department cite it. The 2024 state of the dark-comet population.

Source: https://mysteriesdept.com/sources/SRC0CSKB96C0KDQ/two-distinct-populations-of-dark-comets-delineated-by-orbits  
Publisher: Mysteries Department  
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[Sources](https://mysteriesdept.com/sources)[1I/'Oumuamua](https://mysteriesdept.com/mysteries/oumuamua)Seligman 2024

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# Two distinct populations of dark comets delineated by orbits and sizes

Darryl Z. Seligman, Davide Farnocchia, Marco Micheli et al., 2024. _Proceedings of the National Academy of Sciences_.

Adds seven more dark comets, doubling the sample, finds no dust in archival or targeted images, and separates two populations: larger outer dark comets on eccentric orbits that look like the quiet end of ordinary comets, and smaller inner ones on near-circular orbits. PNAS 121, e2406424121.

**1I/'Oumuamua** Articledoi: **[10.1073/pnas.2406424121](https://doi.org/10.1073/pnas.2406424121)** Checked against the original0

## What it's used for here

The 2024 state of the dark-comet population.

## Cited by on this site 2 records

[Small near-Earth asteroids with no visible activity show non-gravitational accelerations too large for the…](https://mysteriesdept.com/mysteries/oumuamua/evidence/EVD0CSKC1VE1VM1/small-near-earth-asteroids-with-no-visible-activity-show-non)

Evidence

EVD

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

The mystery article

MYS

## Cite it

```
Seligman, D. Z., Farnocchia, D., Micheli, M., Hainaut, O. R., Hsieh, H. H., Feinstein, A. D., Chesley, S. R., Taylor, A. G., Masiero, J., & Meech, K. J. (2024). Two distinct populations of dark comets delineated by orbits and sizes. Proceedings of the National Academy of Sciences. https://doi.org/10.1073/pnas.2406424121
```

[Read it free at doi.org](https://doi.org/10.1073/pnas.2406424121)

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**SRC** 0CSKB96C0KDQ

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Journal article

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The publisher's

Kept

27 Oct 2026, for editors

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