Greek Capital Letter Omicron With Psili
HTML Entity Browser Test:

U+1F48 is the Unicode hex value of the character Greek Capital Letter Omicron With Psili, which is categorized as "uppercase letter" in the Unicode 6.0 character table.

In addition, U+1F48 is a composite character comprising of one or more other Unicode characters modified or combined.

Unicode Character Information
Unicode Hex U+1F48
Character Name GREEK CAPITAL LETTER OMICRON WITH PSILI
General Category Uppercase Letter [Code: Lu]
Canonical Combining Class 0
Bidirectional Category L
Decomposition Mapping 039F 0313
Mirrored N
Lowercase Version U+1F40
Unicode Character Encodings
Greek Capital Letter Omicron With Psili HTML Entity Ὀ (decimal entity), Ὀ (hex entity)
Windows Key Code Alt 8008 or Alt +1F481
Programming Source Code Encodings Python hex: u"\u1F48", Hex for C++ and Java: "\u1F48"
UTF-8 Hexadecimal Encoding 0xE1BD88
1 To type a Unicode symbol in Windows, hold down the ALT key and enter the decimal or hexadecimal code provided using the numeric keypad. The decimal alt code (Alt 8008) will only work on computers with support for this Unicode character in the active code page. The hexadecimal alt code (Alt +1F48) will work for all Unicode characters provided Hex input from the numeric keypad is enabled.
* If the Greek Capital Letter Omicron With Psili character does not display correctly in your browser, you may not have a Unicode font on your system that supports this particular symbol.