instruments / chronology / derived/anchor_ptolemy.txt · raw

derived/anchor_ptolemy.txt. A research program Kieran shapes and a model (the "seat") writes down. "I" in these files is the seat unless a line is quoted as his. The first write-up explained the misses instead of counting them; Kieran's objection ("this is cyclic") is in the file, and so is the retraction. Snapshot of 2026-10-15 from the private repo; local addresses and paths scrubbed, nothing else changed.

Ptolemy: 9 eclipse records (7 with hours), 304 positions; q_night=0.0042 p_hour_false=0.116 occultations 7 q=0.0015
  nights                       mass at conventional = 0.003289; top: -1967.2y n8 h2 o0 χ²66283 0.0033; -1949.2y n8 h2 o0 χ²65063 0.0033; -1931.2y n8 h1 o0 χ²63854 0.0033
  nights+hours                 mass at conventional = 0.997431; top: +0.0y n8 h7 o7 χ²39 0.9974; -1254.5y n8 h5 o0 χ²26547 0.0019; -1027.3y n8 h4 o0 χ²17651 0.0001
  nights+hours+occultations    mass at conventional = 1.000000; top: +0.0y n8 h7 o7 χ²39 1.0000; -1254.5y n8 h5 o0 χ²26547 0.0000; -1027.3y n8 h4 o0 χ²17651 0.0000
  all (+precession)            mass at conventional = 1.000000; top: +0.0y n8 h7 o7 χ²39 1.0000; +7.6y n8 h2 o0 χ²40 0.0000; +10.9y n8 h2 o0 χ²41 0.0000
  record                                   our calendar    days ago  P        aliases
  Nabonassar 1, Thoth 1 (the epoch)        2773·12·28       1012654  1.0000   2765·7·22 (0.0000), 2762·11·25 (0.0000)
  Nab 127 Athyr 27                         2646·1·27         966577  1.0000   
  Nab 225 Phamenoth 17                     2548·4·28         930698  1.0000   
  epoch + 256y 122d                        2516·2·3          919092  1.0000   
  Nab 366 Phamenoth 24                     2407·4·1          879226  1.0000   
  Nab 367 Thoth 16                         2407·10·10        879049  1.0000   
  Nab 574 Phamenoth 27                     2199·2·10         803303  1.0000   
  Nab 607 Tybi 2                           2167·12·2         791343  1.0000   
  epoch + 871y 256d                        1901·1·16         694483  1.0000   
  R1 Timocharis Nab 465 * eta Tau          2309·12·3         843206  1.0000   
  R2 Agrippa Nab 840 * eta Tau             1934·10·2         706298  1.0000   
  R3 Timocharis Nab 454 * alf Vir          2320·13·14        847185  1.0000   
  R4 Timocharis Nab 466 * alf Vir          2308·9·6          842922  1.0000   
  R5 Menelaus Nab 845 * alf Vir            1929·11·16        704429  1.0000   
  R6 Menelaus Nab 845 * bet Sco            1929·11·19        704426  1.0000   
  R7 Timocharis Nab 454 * bet Sco          2320·10·20        847263  1.0000   

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