i'm an ophiuchus

i just found out i am no longer a sagittarius, but now an ophiuchus!  what???  apparently, according to new astronomical calculations, birth dates actually align with the stars this way:
Capricorn: Jan. 20-Feb. 16
Aquarius: Feb. 16-March 11
Pisces: March 11-April 18
Aries: April 18-May 13
Taurus: May 13-June 21
Gemini: June 21-July 20
Cancer: July 20-Aug. 10
Leo: Aug. 10-Sept. 16
Virgo: Sept. 16-Oct. 30
Libra: Oct. 30-Nov. 23
Scorpio: Nov. 23-29
Ophiuchus: Nov. 29-Dec. 17
Sagittarius: Dec. 17-Jan. 20

so that makes me an ophiuchus.  i'm not even sure how to pronounce it...  and what is it? i think i'm having an astrological identity crisis!