Chamaeleon complex

It occupies nearly all of the constellation Chamaeleon and overlaps into Apus, Musca, Carina and Octans.

[1] The Chamaeleon I (Cha I) cloud is one of the nearest active star formation regions at ~160 pc.

[2] It is relatively isolated from other star-forming clouds, so it is unlikely that older pre-main sequence (PMS) stars have drifted into the field.

[4] HD 97300 emits X-rays, illuminates the reflection nebula IC 2631 and is one of the highest mass members of the Cha I cloud, spectral type B9V, a Herbig Ae/Be star without emission lines.

There are some seventy to ninety X-ray sources in the Chamaeleon I star forming region.

[5] The Chamaeleon I dark cloud was observed with the Imaging Proportional Counter (IPC) on board the Einstein Observatory for 2.5 h on January 23–24, 1981, identifying some 22 X-ray sources.

[4] A study with ALMA detected 22 disks around stars in Cha II in continuum.

[22] One notable member of the ε Chamaeleontis association is WISEA J120037.79-784508.3, which is one of the closest brown dwarfs that is surrounded by a disk.