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Rozhen Night Plan

Up to ten targets, one night: each gets its good/marginal/poor windows (darkness × altitude × Moon × clouds, as on the single-target page), then the night is handed out five minutes at a time to whichever target is best — with hysteresis, so you get a few solid blocks of at least 30 minutes, not a flicker. Targets that never win a block are listed with the reason.

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Night of Thursday, 17 December 2026 · astronomical night 18:32 → 06:02 (11.5 h) · Moon 57% (waxing gibbous) · weather: none — the schedule is astronomy only; overall conditions unknown

HD 189733HD 189733 17:25–18:00: quality 0.1HD 189733 18:00–18:35: quality 0.3HD 189733 18:35–19:20: quality 0.6HD 189733 19:20–19:40: quality 0.5HD 189733 19:40–20:00: quality 0.4HD 189733 20:00–20:10: quality 0.3observe HD 189733 18:00–20:10scheduleHD 18973318:0020:0022:0000:0002:0004:0006:00

Each row is the target's quality through the night, white → amber → green for 0 → 0.3 → 0.6 → 1 (the same thresholds as poor / marginal / good). Dark blue: the schedule. Grey columns: twilight.  Download: schedule CSV · targets CSV · JSON

Schedule

localtargethoursmean quality
16:50–18:00 — nothing worth pointing at — 1.17
18:00–20:10 HD 189733 2.17 0.45
20:10–07:45 — nothing worth pointing at — 11.58

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
HD 189733 16 unknown 18:35–18:45 (good) 71.1° at 14:40 62.6° 2.17

💡 API
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2026-12-17"

targets: names or RA Dec, separated by commas, semicolons or newlines, at most ten. The response carries targets[] (score, verdict, best_window, windows, transit, moon_separation), schedule[] (blocks with target, start/end in UTC and local, hours, mean_quality; target: null is idle time), unscheduled[] with a why, forecast_source, warnings[]. Missing targets → 400 {"error", "code": "targets_missing"}; an unreadable date → 400 {"error", "code": "invalid_date"}.