Table schema:
CREATE TABLE table_name_14 (right_ascension___j2000__ VARCHAR, declination___j2000__ VARCHAR, ngc_number VARCHAR, object_type VARCHAR)

Question: What is the Right Ascension with a Diffuse Nebula Object Type has a °42′30″ Declination and a NGC less than 6995?
SQL: SELECT right_ascension___j2000__ FROM table_name_14 WHERE ngc_number < 6995 AND object_type = "diffuse nebula" AND declination___j2000__ = "°42′30″"