Greek Capital Letter Alpha With Dasia
HTML Entity Browser Test:

U+1F09 is the Unicode hex value of the character Greek Capital Letter Alpha With Dasia, which is categorized as "uppercase letter" in the Unicode 6.0 character table.

In addition, U+1F09 is a composite character comprising of one or more other Unicode characters modified or combined.

Unicode Character Information
Unicode Hex U+1F09
General Category Uppercase Letter [Code: Lu]
Canonical Combining Class 0
Bidirectional Category L
Decomposition Mapping 0391 0314
Mirrored N
Lowercase Version U+1F01
Unicode Character Encodings
Greek Capital Letter Alpha With Dasia HTML Entity Ἁ (decimal entity), Ἁ (hex entity)
Windows Key Code Alt 7945 or Alt +1F091
Programming Source Code Encodings Python hex: u"\u1F09", Hex for C++ and Java: "\u1F09"
UTF-8 Hexadecimal Encoding 0xE1BC89
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 7945) will only work on computers with support for this Unicode character in the active code page. The hexadecimal alt code (Alt +1F09) will work for all Unicode characters provided Hex input from the numeric keypad is enabled.
* If the Greek Capital Letter Alpha With Dasia character does not display correctly in your browser, you may not have a Unicode font on your system that supports this particular symbol.