http://www.griffithobs.org/SkyOphiuchus.html
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Astronomical Constellations of the Zodiac
Constellation Dates
Capricornus January 19 to February 15
Aquarius February 16 to March 11
Pisces March 12 to April 18
Aries April 19 to May 13
Taurus May 14 to June 19
Gemini June 20 to July 20
Cancer July 21 to August 9
Leo August 10 to September 15
Virgo September 16 to October 30
Libra October 31 to November 22
Scorpius November 23 to November 29
Ophiuchus November 30 to December 17
Sagittarius December 18 to January 18