official Irish Handicapper gave her a rating of 124, making her the highest-rated Irish-trained three-year-old filly since Ridgewood Pearl in 1995. In the July and August 2018 editions of the World's Best Racehorse Rankings Alpha Centauri was rated the best three-year-old filly in the world. On 15 September Alpha Centauri started the 30/100 favourite for the Matron Stakes over one mile at Leopardstown. After turning into the straight in third place she made good progress to move into second but was unable to overhaul the British-trained filly Laurens and was beaten three quarters of a length. She appeared to veer left a furlong out and a veterinary examination revealed that she had sustained a serious injury to her fetlock. On the day after the race it was announced that the filly had been retired from racing. Harrington commented "I've had an amazing summer with her... It was incredible to have her, and no-one can take away what she's done. For her to sustain the injury she did yesterday – and everyone could see when she did it – and still run on to finish second to another very, very good filly says it all". At the 2018 Cartier Awards, Alpha Centauri was named Champion Three-year-old Filly. In December she was voted Horse of the Year at the Horse Racing Ireland awards. In the 2018 World's Best Racehorse Rankings Alpha Centauri was rated the best three-year-old filly in the world (level with Almond Eye) and the eleventh best horse of any age or sex. Pedigree References External links Career 1-2-3 Colour Chart – Alpha Centauri 2015 racehorse births Racehorses bred in Ireland Racehorses trained in Ireland Thoroughbred family 20 Irish Classic Race winners Cartier Award winners