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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 Tuesday, 28 July 2026 · astronomical night 22:38 → 04:16 (5.63 h) · Moon 100% (full moon) · weather: ERA5 history

HD 189733HD 189733 21:20–21:55: quality 0.1HD 189733 21:55–22:40: quality 0.2HD 189733 22:40–04:00: quality 0.5HD 189733 04:00–04:20: quality 0.4HD 189733 04:20–05:05: quality 0.2HD 189733 05:05–05:45: quality 0.1observe HD 189733 22:40–04:20scheduleHD 18973322:0000:0002:0004:0006:00

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
20:40–22:40 — nothing worth pointing at — 2.0
22:40–04:20 HD 189733 5.67 0.48
04:20–06:15 — nothing worth pointing at — 1.92

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
HD 189733 48 43 22:40–04:20 (marginal) 71.1° at 00:55 45.9° 5.67

💡 API
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2026-07-28"

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"}.