This character is a Other Letter and is mainly used in the Lycian script.
The glyph is not a composition. It has no designated width in East Asian texts. In bidirectional text it is written from left to right. When changing direction it is not mirrored. The word that U+1028A forms with similar adjacent characters prevents a line break inside it. The glyph can be confused with one other glyph.
El Wikipedia tiene la siguiente información acerca de este punto de código:
The Lycian alphabet was used to write the Lycian language of the Asia Minor region of Lycia. It was an extension of the Greek alphabet, with half a dozen additional letters for sounds not found in Greek. It was largely similar to the Lydian and the Phrygian alphabets.
Representaciones
Sistema
Representación (click value to copy)
N.º
66186
UTF-8
F0 90 8A 8A
UTF-16
D8 00 DE 8A
UTF-32
00 01 02 8A
URL-Quoted
%F0%90%8A%8A
HTML hex reference
𐊊
Mojibake mal de windows-1252
ðŠŠ
Codificación: GB18030 (hexadecimales bytes)
90 30 C2 30
RFC 5137
\u'1028A'
Bash and Zsh inside echo -e
\U0001028A
C and C++
\U0001028A
C#
\U0001028A
CSS
\01028A
Excel
=UNICHAR(66186)
Go
\U0001028A
JavaScript
\uD800\uDE8A
Modern JavaScript since ES6
\u{1028a}
JSON
\uD800\uDE8A
Java
\uD800\uDE8A
Lua
\u{1028A}
Matlab
char(66186)
Perl
"\x{1028A}"
PHP
\u{1028a}
PostgreSQL
U&'\+01028A'
PowerShell
`u{1028A}
Python
\U0001028A
Ruby
\u{1028a}
Rust
\u{1028a}
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