Just a little disproportionate

SELECT * FROM gallery2 WHERE topic_id="1420796" UNION SELECT * FROM gallery2 WHERE topic_id="1041836" UNION SELECT * FROM gallery2 WHERE topic_id="147118" UNION SELECT * FROM gallery2 WHERE topic_id="505798" UNION SELECT * FROM gallery2 WHERE topic_id="1390464" UNION SELECT * FROM gallery2 WHERE topic_id="877630" UNION SELECT * FROM gallery2 WHERE topic_id="1474835" UNION SELECT * FROM gallery2 WHERE topic_id="1625480" UNION SELECT * FROM gallery2 WHERE topic_id="1180794" UNION SELECT * FROM gallery2 WHERE topic_id="904076" UNION SELECT * FROM gallery2 WHERE topic_id="1056787" UNION SELECT * FROM gallery2 WHERE topic_id="186160" UNION SELECT * FROM gallery2 WHERE topic_id="1244403" UNION SELECT * FROM gallery2 WHERE topic_id="518841" UNION SELECT * FROM gallery2 WHERE topic_id="1245626" UNION SELECT * FROM gallery2 WHERE topic_id="1566010"