Planetoid 127 is a novel by Edgar Wallace published in 1929.
Planetoid 127 is a novel in which Professor Colson uses a device to communicate with Earth's sister planet (located on the other side of the Sun) to get stock market results in advance.[1]
Dave Langford reviewed Planetoid 127 for White Dwarf #87, and stated that "a rare SF venture by the doyen of hack thrillers."[1]