| Stock 16 | |
| Epoch: | J2000 |
| Class: | Open cluster |
| Constellation: | Centaurus |
| Ra: | [1] |
| Dist Pc: | 1900 pc |
| Size V: | 18 x 13 |
| Names: | C 1315-623 |
Stock 16 is a very young Galactic open cluster in the H II region RCW 75 (= Gum 48a). This region lies at the end of an "elephant trunk" shaped molecular cloud and may be a region with triggered star formation. The primary ionizing source for the H II region is the star HD 115455, with spectral type O7.5 III.
RCW 75 is also Gum 48a.[2]
In Turner's 1985 paper The young open cluster Stock 16: an example of star formation in an elephant trunk? it was proposed the Stock 16 cluster was an example of star formation.[3] The study included UBV photometry of over thirty stars in the cluster.
It is the 16th object in Jürgen Stock's catalogue of open clusters.