Update

2023/03/06

NEW The latest version is on 06 March 2023. C7N- was newly detected.
The 283 molecules have been detected so far.

2023/03/02

The latest version is on 02 March 2023. C10H- was newly detected.
The 282 molecules have been detected so far.

2023/02/06

The latest version is on 06 February 2023. NC4NH+ and CH2CHCHNH were newly and tentatively detected, respectively.
The 281 molecules have been detected so far.

2022/12/09

The latest version is on 09 December 2022. MgC2, HCCCHCCC and HCCCCS were newly detected.
The 280 molecules have been detected so far.

2022/11/31

The latest version is on 30 November 2022. The SiP radical was newly detected.
The 277 molecules have been detected so far. Historical information of c-SiC2, C2S, C3 and CH2 was corrected.

Read me

This site is edited by Mitsunori Araki, Max-Planck-Institut fuer extraterrestrische Physik. E-mail:

■ Sortable for numbers of atoms, species of atoms included, functional groups and detected years
■ References of the first detections are linked.
■ Clouds, telescopes, and column densities for the first detections are listed.
■ For details, see a readme sheet in the Excel file.
■ CAUTION: This list includes tentatively detected molecules. Check the status column.