Tentatively it can be stated that toki hipu indicates a dark time, while tagata toki seems rather to indicate that light is still 'living'. The elbow ornament of Rogo in Eb7-1 apparently is a leg, presumably meaning that Sun (who has only 1 'leg') now has 'emptied his hand'. The other toki hipu (in *Qb6-25) is located as the last part of the day beyond the kuhane station Roto Iri Are.

I guess the name Reitaga for Sirius is a mistake. It should rather be the name of Venus in one of her 8 night long dark periods. Taga means a bag or sack. When Venus is in 'the sack' she cannot be seen, but Sirius is always there.

"... the name Ishtar is shared by both Venus and Sirius ..." (Hamlet's Mill)

In the round Dendera zodiac a sequence is beginning with a god holding a 'digging stick' (henen) and the 5th figure is a bull (or cow) lying down. The idea could therefore be to represent the 5 periods of the Bull (because a mattock associates with a 'bull'). Above the sequence rules a great Lion. Both Bull and Lion are pictured inside what could be boats (there is water in the blue sky above us):

The 'bull' lying down is uplifted (reva) compared with the preceding 4 figures, probably meaning he is in the sky. The preceding 4th person has a bow and arrows, maybe intending to 'bring him down'. If the bull has exhausted himself (he is lying down) and left this earth (with his spirit now being in the sky), only an arrow can reach him.

The 2nd figure obviously is holding a child (tamaiti) in her hand. The 'digging stick' has worked its magic. The 3rd figure has the arms in a posture we can recognize as a sign of finality (cfr tagata rere). The first 3 persons in this sequence could represent the 300 days of Sun. In the headgear of the 'final' person we can count to 7, as in the crown of the great bird:

The standing bow-and-arrow figure will then correspond to the one who is blowing the horn. We can guess it is a female god, a garment of the Moon. According to Hamlet's Mill she is Satit and she is aiming her arrow at the cow Sothis (Sirius). It must also be mentioned that Puppis (the Stern of Argo) is part of the Mesopotamian constellation of Bow and Arrow.