List of Observed Interstellar Molecules

Since 1996

Click this figure to download.

Update

2022/12/09
NEW 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 were corrected.

2022/10/31
The latest version is on 31 October 2022. 2-Cyanoindene (2-C9H7CN) was newly detected.
The 276 molecules have been detected so far.

2022/10/06
The latest version is on 06 October 2022. Five missing molecules were added and one double count was corrected.
The 275 molecules have been detected so far.

2022/08/08
The latest version is on 08 August 2022. The 15 molecules were newly detected. The 271 molecules have been detected so far.

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.