GOLF BALL
A golf ball 2 has a plurality of dimples on a surface thereof. A ratio So of a sum of areas of the dimples relative to a surface area of a phantom sphere of the golf ball is equal to or greater than 81.0%. A ratio Rs of a number of the dimples each having a diameter of equal to or greater than 9.60% but equal to or less than 10.37%, of a diameter of the golf ball, relative to a total number of the dimples, is equal to or greater than 50%. A dimple pattern of each hemisphere of the phantom sphere includes three units that are rotationally symmetrical to each other. A dimple pattern of each unit includes two small units that are mirror-symmetrical to each other. The golf ball meets the following mathematical formula (1). Rs ≧−2.5* So +273 (1)
1 . A golf ball having a plurality of dimples on a surface thereof, wherein
a ratio So of a sum of areas of the dimples relative to a surface area of a phantom sphere of the golf ball is equal to or greater than 81.0%,
a ratio Rs of a number of the dimples each having a diameter of equal to or greater than 9.60% but equal to or less than 10.37%, of a diameter of the golf ball, relative to a total number of the dimples, is equal to or greater than 50%,
a dimple pattern of each hemisphere of the phantom sphere includes three units that are rotationally symmetrical to each other,
a dimple pattern of each unit includes two small units that are mirror-symmetrical to each other, and
the golf ball meets the following mathematical formula (1):
Rs≧− 2.5* So+ 273 (1).
2 . The golf ball according to claim 1 , wherein the golf ball meets the following mathematical formula (2):
Rs≧− 2.5* So+ 278 (2).
3 . The golf ball according to claim 2 , wherein the golf ball meets the following mathematical formula (3):
Rs≧− 2.5* So+ 283 (3).
4 . The golf ball according to claim 1 , wherein
a ratio Rs′ of a number of the dimples each having a diameter of equal to or greater than 10.10% but equal to or less than 10.37%, of the diameter of the golf ball, relative to the total number of the dimples, is equal to or greater than 50%, and
the golf ball meets the following mathematical formula (4):
Rs′≧− 2.2* So+ 245 (4).
5 . The golf ball according to claim 4 , wherein the golf ball meets the following mathematical formula (5):
Rs′≧− 2.2* So+ 252 (5).
6 . The golf ball according to claim 1 , wherein a depth of a deepest part of each dimple from a surface of the phantom sphere is equal to or greater than 0.10 mm but equal to or less than 0.65 mm.
7 . The golf ball according to claim 1 , wherein a total volume of the dimples is equal to or greater than 450 mm 3 but equal to or less than 750 mm 3 .
8 . The golf ball according to claim 1 , wherein a ratio of a number of the dimples each having a diameter exceeding 10.37% of the diameter of the golf ball, relative to the total number of the dimples, is less than 50%.