62:10:35.2 & $\dots$ & R104\
26 & 02:25:42.74 & 62:08:10.7 & $\dots$ & $\dots$\
27 & 02:25:43.36 & 62:06:18.0 & $\dots$ & W3-Main center\
28 & 02:25:32.91 & 62:06:49.4 & $\dots$ & $\dots$\
29 & 02:25:32.98 & 62:04:32.9 & 2 & $\dots$\
30 & 02:25:30.88 & 62:00:05.7 & 2 & NGC 896 center\
31 & 02:25:30.41 & 61:57:11.6 & 3 & R103\
32 & 02:25:21.90 & 62:07:06.8 & $\dots$ & $\dots$\
33 & 02:25:10.23 & 62:03:11.0 & $\dots$ & R105\
34 & 02:25:13.21 & 61:59:21.6 & $\dots$ & $\dots$\
35 & 02:25:00.93 & 62:09:08.7 & 3 & R102\
36 & 02:25:03.58 & 62:06:52.4 & 1 & $\dots$\
37 & 02:25:00.26 & 62:05:37.0 & 3 & $\dots$\

In Figure \[fig:gather\] we also placed labels (“RI") next to regions coinciding with “sub-clusters" identified by @Rivera-Ingraham:2011yq. It is worth noticing how the *gather* map highlights the groups $A,\ B,\ C$ that were identified by eye in Figure \[fig:W3OH\].

### YSO Ratio Maps \[s:analysis:ss:ysodist:sss:ratiomaps\]

It is possible to trace the evolution of a star-forming region through the construction of maps of YSO number ratios. Figure \[fig:ratiomaps\] shows maps for the Class II to Class III number ratio, $R_{\mathrm{II:III}}$, and the Class I/0 to Class 