This is actually a model of a Bajoran lightship (as seen in the Star Trek: Deep Space 9 episode “Explorers”) and was knit for a NerdWars challenge. The solar sails aren’t fully deployed -- which is why it looks like a butterfly..

It’s charted only. The RS is worked only in knit, ssk, k2tog, and yo. It has a 3-st garter stitch border.

You may want to add a 2 or 3-st stockinette border as well for added width. (The cast on in the directions includes the garter stitch border but no extra stockinette.) Wrong side rows are also not charted.