This image which was captured in September 2018 does not feature a smiley green Emoji but the Browndown navigation buoy that is located in Stokes Bay in the Solent near to the entrance to Portsmouth Harbour.
Author: John Leary
Photo size: 3.1 Mpixels (8.96 MB uncompressed) - 2000x1565 pixels (6.7x5.2 in / 16.9x13.3 cm at 300 ppi)