This character is a Other Symbol and is commonly used, that is, in no specific script.
The glyph is not a composition. Its width in East Asian texts is determined by its context. It can be displayed wide or narrow. In bidirectional text it acts as Other Neutral. When changing direction it is not mirrored. If its East Asian Width is “narrow”, U+2605 forms a word with similar characters, which prevents a line break inside it. Otherwise it allows line breaks around it, except in some numeric contexts.
The Wikipedia has the following information about this codepoint:
In typography, a star is any of several glyphs with a number of points arrayed within an imaginary circle. A commonly used star symbol is the asterisk.
Representations
System
Representation (click value to copy)
Nº
9733
UTF-8
E2 98 85
UTF-16
26 05
UTF-32
00 00 26 05
URL-Quoted
%E2%98%85
HTML hex reference
★
Wrong windows-1252 Mojibake
★
HTML named entity
★
HTML named entity
★
Encoding: BIG5 (hex bytes)
A1 B9
Encoding: BIG5HKSCS (hex bytes)
A1 B9
Encoding: CP932 (hex bytes)
81 9A
Encoding: CP949 (hex bytes)
A1 DA
Encoding: CP950 (hex bytes)
A1 B9
Encoding: EUC_JP (hex bytes)
A1 FA
Encoding: EUC_JIS_2004 (hex bytes)
A1 FA
Encoding: EUC_JISX0213 (hex bytes)
A1 FA
Encoding: EUC_KR (hex bytes)
A1 DA
Encoding: GB2312 (hex bytes)
A1 EF
Encoding: GBK (hex bytes)
A1 EF
Encoding: GB18030 (hex bytes)
A1 EF
Encoding: HZ (hex bytes)
7E 7B 21 6F 7E 7D
Encoding: ISO2022_JP (hex bytes)
1B 24 42 21 7A 1B 28 42
Encoding: ISO2022_JP_1 (hex bytes)
1B 24 42 21 7A 1B 28 42
Encoding: ISO2022_JP_2 (hex bytes)
1B 24 42 21 7A 1B 28 42
Encoding: ISO2022_JP_2004 (hex bytes)
1B 24 42 21 7A 1B 28 42
Encoding: ISO2022_JP_3 (hex bytes)
1B 24 42 21 7A 1B 28 42
Encoding: ISO2022_JP_EXT (hex bytes)
1B 24 42 21 7A 1B 28 42
Encoding: ISO2022_KR (hex bytes)
1B 24 29 43 0E 21 5A 0F
Encoding: JOHAB (hex bytes)
D9 6A
Encoding: SHIFT_JIS (hex bytes)
81 9A
Encoding: SHIFT_JIS_2004 (hex bytes)
81 9A
Encoding: SHIFT_JISX0213 (hex bytes)
81 9A
LATEX
\ding{72}
Adobe Glyph List
blackstar
digraph
*2
RFC 5137
\u'2605'
Bash and Zsh inside echo -e
\u2605
C and C++
\u2605
C#
\u2605
CSS
\002605
Excel
=UNICHAR(9733)
Go
\u2605
JavaScript
\u2605
Modern JavaScript since ES6
\u{2605}
JSON
\u2605
Java
\u2605
Lua
\u{2605}
Matlab
char(9733)
Perl
"\x{2605}"
PHP
\u{2605}
PostgreSQL
U&'\2605'
PowerShell
`u{2605}
Python
\u2605
Ruby
\u{2605}
Rust
\u{2605}
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