As character names:

U+25D1 CIRCLE WITH RIGHT HALF BLACK character (◑)

As raw characters:

◑

As a string of HTML entities:

◑

Decoder output:

Byte number 1 is decimal 226, hex 0xE2, octal \342, binary 11100010
This is the first byte of a 3 byte sequence.

Byte number 2 is decimal 151, hex 0x97, octal \227, binary 10010111
This is continuation byte 1, expecting 1 more.

Byte number 3 is decimal 145, hex 0x91, octal \221, binary 10010001
This is continuation byte 2, expecting 0 more.

U+25D1	CIRCLE WITH RIGHT HALF BLACK
	x (last quarter moon symbol - 1F317)