Equuleus the Little Horse is a diminutive constellation that lies south of the Summer Triangle. September nights are a great time to view the Little Horse.
Cassiopeia the Queen is an easy-to-find constellation. It has the shape of a W or M. Look in the north-northeast sky on September and October evenings.
Delphinus the Dolphin is a petite constellation that looks like the animal it's supposed to represent. Look for the dolphin leaping under the Summer Triangle.
Aquila the Eagle is home to the bright star Altair, which forms one corner in the Summer Triangle. Look for it in the evening sky from July to November.