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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.

Try: an autumn deep-sky night  ·  ← previous night · next night →

Night of Monday, 07 September 2026 · astronomical night 21:20 → 05:17 (7.94 h) · Moon 13% (waning crescent) · weather: ERA5 history

M42M42 19:40–04:05: unusableM42 04:05–04:40: marginalM42 04:40–05:20: goodM42 05:20–05:55: marginalM42 05:55–06:30: poorM42 06:30–06:55: unusableobserve M42 04:05–05:55scheduleM4220:0022:0000:0002:0004:0006:00

Faded bands: each target's own windows (green good, amber marginal, pink poor). Dark blue: the schedule. Grey columns: twilight.

Schedule

localtargethoursmean quality
19:40–04:05 — nothing worth pointing at — 8.42
04:05–05:55 M42 1.83 0.54
05:55–06:55 — nothing worth pointing at — 1.0

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M42 Great Orion Nebula 20 20 04:40–05:20 (good) 42.9° at 07:50 49.5° 1.83

💡 API
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2026-09-07"

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"}.