BigSkyAstro

macOS Version 17 Build 4

A major planner-timing update for Astronomy Observation Planner on Mac. Version 17 aligns the macOS target chain with the corrected iOS behavior and refreshes release documents, logic diagrams, and website screenshots.

Version 17 Build 4 Updated July 19, 2026 macOS

Timing Correction

The planner now treats the selected observation window as a night chain. The first selected target starts at initialization. Each next target starts at its first visible/card start and closes the previous target. The final target uses the remaining observing window only while it remains visible; if its card end arrives first, the rest of the window remains unused until another target is added.

Base Test Chain

  • M3: 22:34 to 23:49
  • M11: 23:49 to 01:04
  • NGC 6823: 01:04 to 02:34
  • NGC 6992: 02:34 to 04:47, unless its visible card end is earlier

What Changed

  • macOS planner service now starts the first target at initialization.
  • Next-start boundaries are normalized across midnight.
  • Recommended/card end times cap target windows.
  • Planner tests now cover the iOS comparison targets and a mixed nebula/cluster set.
  • Release docs and logic-flow diagrams describe Version 17 Build 4.

Updated Screens

Release Files