9. The distance to move ahead should instead be 87 days, from winter solstice to spring equinox (south of the equator):

63 27
Gb6-26 (*1) Ga1-27 (28)
March 22 June 21
92
50 33
Ga1-28 (**1) Ga3-20 (80) Ga3-21 (**53) Ga5-4 (**87) Ga5-5 (*180)
June 22 Alterf (144.4) Denebola (179.3) 17 (260)
August 12-13 September 16
87
67
Ga5-6 (117) Ga5-7 Ga7-16 (*250)
    Antares (250.1)
September 18 (261) 19 November 26 (330)
70

Day number 260 according to our own calendar is September 17 and by adding 70 days we will reach November 26, where Antares is rising heliacally. Maybe we should change perspective somewhere beyond Ga7-16:

Ga7-17 (*251) Ga7-18 (**160) Ga7-19 Ga7-20 (190) Ga7-21
November 27 (331) 28 29 30 December 1 (335)
11 (223) 12 13 14 August 15 (227)
Alterf
Ga7-22 (192) Ga7-23 Ga7-24
December 2 (336) 3 4
16 17 August 18 (230)
Ga7-25 Ga7-26 Ga7-27 Ga7-28 Ga7-29 Ga7-30 (200)
December 5 (339) 6 7 8 9 10
19 20 21 22 23 August 24 (236)
15
Ga7-31 Ga7-32 Ga7-33 (203)
December 11 (345) 12 13
25 26 August 27 (239)
Ga8-16 (219) Ga8-17 Ga8-18 Ga8-19 Ga8-20 (**195)
December 29 30 31 (365) January 1 2
12 13 14 September 15 16 (259)
Denebola
Ga8-21 Ga8-22 Ga8-23 Ga8-24 Ga8-25 (228) Ga8-26
17 (260) 18 19 20 September 21 22 (265)