Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_37869 ( "orbit" text, "center-to-center distance" text, "altitude above the Earth's surface" text, "Orbital period" text, "specific orbital energy" text )

### Question ###
center-to-center distance of 6,900 to 46,300 km involves which orbital period?

### Accurate SQL ###

SELECT "Orbital period" FROM table_37869 WHERE "center-to-center distance" = '6,900 to 46,300 km'