1916 Boreas a rotation period between 3.4741 and 3.49 hours with a brightness variation between 0.25 and 0.35 magnitude (). In 1994, astronomer Tom Gehrels estimated "Boreas" to measure 3.5 kilometers in diameter, based on an assumed albedo of 0.15. The "Collaborative Asteroid Lightcurve Link" assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of 3.07 kilometers with an absolute magnitude of 14.93. This minor planet is named after the Greek god of the north wind, Boreas, as the asteroid was discovered moving rapidly northward after passing the ascending node of its orbit. The official naming citation was
Notus, Idaho article from 1986, Notus got its name from the daughter of a railroad official. The daughter reportedly thought "notus" was of Native American origin and meant "it's all right." The town of Notus was almost known as 'Lemp'. In 1926, the Notus secondary school was founded. In 2017, the old building was deconstructed to be replaced by an up to date building. Since the 1970s Notus has been informally twinned with the village of Ousden in the United Kingdom. Notus is located at (43.726082, -116.801866). According to the United States Census Bureau, the city has a total area of ,