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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, 11 September 2025 · astronomical night 21:12 → 05:22 (8.17 h) · Moon 78% (waning gibbous) · weather: ERA5 history

M31M31 21:00–22:00: quality 0.1M31 02:00–02:45: quality 0.4M31 02:45–03:00: quality 0.3M31 03:00–05:00: quality 0.4M31 06:00–06:35: quality 0.1observe M31 03:10–03:45M42M42 03:45–04:00: quality 0.2M42 04:00–04:35: quality 0.3M42 04:35–05:00: quality 0.4M42 06:00–06:35: quality 0.1observe M42 04:55–05:00M45M45 02:00–03:00: quality 0.3M45 03:00–05:00: quality 0.4M45 06:00–06:35: quality 0.1observe M45 04:20–04:55NGC 7000NGC 7000 21:00–21:15: quality 0.1NGC 7000 21:15–21:30: quality 0.2NGC 7000 21:30–22:00: quality 0.1NGC 7000 02:00–03:00: quality 0.5NGC 7000 03:00–03:30: quality 0.6NGC 7000 03:30–05:00: quality 0.5observe NGC 7000 02:35–03:10V1057 CygV1057 Cyg 21:00–21:15: quality 0.1V1057 Cyg 21:15–21:30: quality 0.2V1057 Cyg 21:30–22:00: quality 0.1V1057 Cyg 02:00–03:00: quality 0.5V1057 Cyg 03:00–03:30: quality 0.6V1057 Cyg 03:30–05:00: quality 0.5observe V1057 Cyg 02:00–02:35M33M33 21:45–22:00: quality 0.1M33 02:00–02:15: quality 0.4M33 02:15–03:00: quality 0.3M33 03:00–05:00: quality 0.4M33 06:00–06:35: quality 0.1observe M33 03:45–04:20schedule20:0022:0000:0002:0004:0006:00

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
19:35–02:00 — nothing worth pointing at — 6.42
02:00–02:35 V1057 Cyg 0.58 0.5
02:35–03:10 NGC 7000 0.58 0.5
03:10–03:45 M31 0.58 0.42
03:45–04:20 M33 0.58 0.4
04:20–04:55 M45 0.58 0.4
04:55–05:00 M42 0.08 0.4
05:00–07:00 — nothing worth pointing at — 2.0

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 82 24 02:00–05:00 (marginal) 89.7° at 02:40 33.4° 0.58
M42 Great Orion Nebula 7 4 04:15–05:00 (marginal) 42.9° at 07:30 48.7° 0.08
M45 Seven Sisters 22 12 02:00–05:00 (marginal) 72.5° at 05:45 13.8° 0.58
NGC 7000 North America Nebula 100 28 02:00–05:00 (marginal) 87.3° at 22:55 73.8° 0.58
V1057 Cyg 100 28 02:00–05:00 (marginal) 87.3° at 22:55 73.8° 0.58
M33 Triangulum Pinwheel 46 15 02:00–05:00 (marginal) 79.1° at 03:30 19.4° 0.58
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2025-09-11"

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"}.