Fig. 2
Hα images obtained in 2003 and 2010 of the five moving knots in the proximities of the Th 28 jet, plus a possibly moving arc-shaped nebula southeast of Th 28. The displacement in the intervening 7.2 years images can be noticed for most of them by comparison with stars in the field. North is up and East to the left. Note the different scales of the images.
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