As character names:

U+2BEB STAR 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 175, hex 0xAF, octal \257, binary 10101111
This is continuation byte 1, expecting 1 more.

Byte number 3 is decimal 171, hex 0xAB, octal \253, binary 10101011
This is continuation byte 2, expecting 0 more.

U+2BEB	STAR WITH RIGHT HALF BLACK