# Is this really Rosetta's orbit around 67P?

From this link I fount the following representation of Rosetta's orbit relative to 67P:

A video from ESA depicts a similar orbit.

My questions are:

• is that really the relative orbit?

If yes:

• why is it triangular initially? does this bring some specific benefits?
• doesn't that shape costs a ludicrous amount of propellant? or in the Sun-centered fixed frame of reference the actual orbit undergoes much smaller changes of direction than it would appear from the images shown? (and thus the total $\Delta V$ required is not as big)
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