Accordingly, it is not generally thought that the Egyptians were aware that the orbital period of Saturn is 30 years, but the attractive conjecture has long been made that there was a connection between the planet and the ḥeb sed (“tail festival”).77 This was a royal jubilee, on which occasion the pharaoh would wear his ceremonial bull’s tail as a symbol of kingship.78 Saturn was known as Ḥeru-(pɜ)-kɜ-(pet) or “Horus (the) Bull (of heaven)”.79 As a bull, Saturn seems to have been seen as a celestial embodiment of kingship, perhaps akin to the nostalgic perception of Kronos/Saturn as the exemplary king in the classical world.80 The ḥeb sed was associated with a cycle of 30 years,81 either marking the 30th regnal year of a long-lived monarch or, as Petrie preferred, a fixed astronomical cycle that was independent from regnal periods; Petrie offered instances which in his opinion “show absolutely that the cycle was not a regnal feast but an astronomical one of regular recurrence.”
This offers some support to the notion that the Egyptians may have understood the orbital period of Saturn. The Babylonian numbers of 265 years amounting to 9 rotations or 3240 degrees relate to this. In his paper on the discovery of the Pyradmidion of G1-d, Zahi Hawass links the Heb-Sed festival to the satellite pyramid and declares it a changing room for the king. Still doesn't explain why when you truncate the pyramid at a height of 265 Royal Cubits, the top horizontal square, or base length of the 15 cubit remaining pyramid at ~23.57 Royal Cubits when multiplied by a number very close to the mathematical constant of the Golden Angle (137.5 degrees) of 137.45 yields 3240 - the number of degrees in the Babylonian System A parameters for Saturn over 265 years.
Refer to [link.springer.com]
We know (see Table 2) that the Babylonian astronomers derived from their observational database that in 427 years Jupiter makes 36 passages through the 360° zodiac and that during that time it experiences 391 first appearances.Footnote 12 We do not have a “procedure” text in which this is stated explicitly, but it can be reconstructed from the (fragments) of procedure texts and ephemerides of Jupiter that have survived. For Saturn we do have such a text from Uruk (A 3418 = ACT No. 802) where we read in Section 4:
Concerning Saturn. 4,25 (265) years corresponds to 4,16 (256) first appearances and to 9 rotationsFootnote 13 and to 54,0 (3240) degrees.
Is this coincidence? If not, the encoding in the Pyramid would pre-date the Babylonian texts by a substantial margin.