Question: At the longitude of 355.0E, what is the name origin?
SQL: SELECT "Name origin" FROM "1-16799784-9" WHERE "Longitude" = '355.0E';

Question: What is the name origin of Morrigan Linea?
SQL: SELECT "Name origin" FROM "1-16799784-9" WHERE "Name" = 'Morrigan Linea';

Question: How many years have a longitude measure of 20.0E?
SQL: SELECT COUNT("Year named") FROM "1-16799784-9" WHERE "Longitude" = '20.0E';

Question: At a longitude of 293.0E, what is the diameter, in km?
SQL: SELECT "Diameter (km)" FROM "1-16799784-9" WHERE "Longitude" = '293.0E';