On Aug. 25, 1989, NASA’s Voyager 2 made its historic flyby of Neptune and that planet’s largest moon Triton. The Cassini mission is publishing this image to celebrate the anniversary of that event.
I remember this well, I was downloading the images on Slow Scan Television (SSTV) along with many-many other ham radio operators. Good times!
This is cropped and magnified version of the original provided in monochrome with Triton visible as a point of light above and to the left of Neptune.
NASA – In imaging Neptune, Cassini’s solar system family portrait-taking is complete. The mission’s planetary photojournal includes all of the major planets except Mercury, which is too close to the Sun to be imaged, as well as dwarf planet Pluto.
This view was acquired by the Cassini narrow-angle camera on Aug. 10, 2017, at a distance of approximately 2.72 billion miles (4.38 billion kilometers) from Neptune. Red, blue and green filter images were combined to create the natural color image.
Image: NASA/JPL-Caltech/Space Science Institute