Curve name  $X_{9a}$  
Index  $12$  
Level  $8$  
Genus  $0$  
Does the subgroup contain $I$?  No  
Generating matrices  $ \left[ \begin{matrix} 1 & 0 \\ 6 & 3 \end{matrix}\right], \left[ \begin{matrix} 1 & 0 \\ 2 & 7 \end{matrix}\right], \left[ \begin{matrix} 1 & 1 \\ 2 & 5 \end{matrix}\right]$  
Images in lower levels 


Meaning/Special name  
Chosen covering  $X_{9}$  
Curves that $X_{9a}$ minimally covers  
Curves that minimally cover $X_{9a}$  
Curves that minimally cover $X_{9a}$ and have infinitely many rational points.  
Model  $\mathbb{P}^{1}$, a universal elliptic curve over an appropriate base is given by \[y^2 = x^3 + A(t)x + B(t), \text{ where}\] \[A(t) = 27t^{6}  4752t^{4}  276480t^{2}  5308416\] \[B(t) = 54t^{9} + 14256t^{7} + 1410048t^{5} + 61931520t^{3} + 1019215872t\]  
Info about rational points  
Comments on finding rational points  None  
Elliptic curve whose $2$adic image is the subgroup  $y^2 = x^3  x^2  33x + 62$, with conductor $100$  
Generic density of odd order reductions  $2659/10752$ 