Rudolf Ferdinand Spitaler (7 January 1849 – 16 October 1946) was an Austrian astronomer, geophysicist, meteorologist and climatologist.

[1][2][3][4] He discovered 64 IC objects whilst working at Vienna Observatory and Comet 113P/Spitaler.

[5] He was one of the first to speculate the existence of a 13th zodiacal constellation, which later became known as Ophiuchus.

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