no
No it does not have moons or rings
Sedna has no moons.
There is not a way to tell how many km are from the sun to Sedna. It is a long distence from the sun to Sedna.
Not "a" Sedna; just "Sedna". Sedna is the Inuit goddess of the sea. Also, a dwarf planet named after this goddess.
Sedna
sedna is red and Pluto is thought to be grey. Sedna is smaller then Pluto.
No. Sedna is currently classified as a planetoid.
Sedna was discovered on November 14, 2003.
sedna is hot, crusty, and shallow
It appears that there is no atmosphere on Sedna.
Sedna is a small DWARF planet made of ice and rock.