Miyagi is asteroid #19534 and also known as 1999 GL₄₇. Miyagi is a discovery of the Lowell Observatory Near Earth Object Search (LONEOS) directed by Ted Bowell at the Anderson Mesa Station of the Lowell Observatory. Miyagi nevertheless isn’t a Near Earth Object, but a common asteroid from the proximal section of the Asteroid Main Belt. Miyagi’s orbit is characterized by a semi-major axis of 2.26 Astronomical Units, an eccentricity of 0.12, a period of revolution of 1 242 days, and an inclination of 6.1 degrees.

Miyagi is named after the Miyagi (宮城) Prefecture in the northeast of the Japanese main island Honshū (本州). The administration of Miyagi-ken (宮城県) is located in its Sendai (仙台) City, which became famous because of the tsunami in 2011. Miyagi-ken (宮城県) is located north of Fukushima-ken (福島県), south of Iwate-ken (岩手県), and east of Yamagata-ken (山形県) and also Akita-ken (秋田県), although the border with Akita-ken (秋田県) is very short. These are all prefectures as shown by the ending ~ken (県). East of Miyagi-ken (宮城県) is the sea. Miyagi-ken (宮城県) equals roughly the pre-modern Rikuzen-no-Kuni (陸前国), where the ending means province. There is an island with name Ooshima (大島) in Miyagi-ken (宮城県).

Miyagi is only named after a Japanese prefecture. So it is a mere place name asteroid. I had of course a look at this asteroid because I recognized the name Miyagi as the name of the karate master in the movie Karate Kid. But already the asteroids Funakoshi and Matsumura have no direct connection with karate. The only good news here is that Miyagi (宮城) also is a real Japanese family-name and there is only one way to spell it, which is in the very same way as the prefecture. But there is no hint that the name of the province could be a detour to name the asteroid after Mister Miyagi from Karate Kid. It is rather quite usual to name asteroids after provinces and prefectures. The characters for Miyagi (宮城) translate as castles and bulwarks. So the name denotes a wild area.