Answer
center $(-1,-8)$, radius $r=2$
Work Step by Step
Rewrite the equation and form squares of $x,y$, we have $x^2+2x+1+y^2+16y+64=1+64-61\longrightarrow (x+1)^2+(y+8)^2=4$. Thus, the equation represents a circle with center at $(-1,-8)$ and radius $r=2$
