*)Annotation: Since its discovery on February 18, 1930 until 2018, Pluto has only completed about a third of a sun orbit. Furthermore, because the Pluto orbit is much more inclined than the orbits of the other planets compared to the ecliptic at 17 degrees, there is also a higher uncertainty factor for the orbits of Pluto. This are probably the main reasons why the solar orbit of Pluto is given differently in different astronomical data sources. In the book "The Cosmic Octave" published in 1984, Hans Cousto assumed an orbital period of 90737.2 days for Pluto, of which he calculated the 40th Okatve at 140.25 Hz. In NASA's JPL Small-Body Database Browser today the period is listed with 90487.277 days. The corresponding octave tone is 140.64 Hz.