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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 Monday, 25 August 2025 · astronomical night 21:46 → 05:00 (7.23 h) · Moon 7% (waxing crescent) · weather: ERA5 history

M31M31 21:10–21:50: quality 0.1M31 21:50–22:00: quality 0.3M31 22:00–22:40: quality 0.4M31 22:40–23:00: quality 0.5M31 23:00–23:55: quality 0.6M31 23:55–00:25: quality 0.7M31 00:25–01:00: quality 0.8M31 01:00–02:00: quality 0.9M31 02:00–03:00: quality 1.0M31 03:00–04:00: quality 0.9M31 04:00–05:05: quality 1.0M31 05:05–05:40: quality 0.5M31 05:40–06:00: quality 0.1M31 06:00–06:15: quality 0.2observe M31 00:30–01:50observe M31 05:05–05:35M42M42 04:55–05:00: quality 0.4M42 05:00–05:05: quality 0.5M42 05:05–05:10: quality 0.2M42 05:10–05:40: quality 0.3M42 05:40–06:15: quality 0.1observe M42 04:55–05:05observe M42 05:35–05:40M45M45 01:15–01:35: quality 0.4M45 01:35–01:50: quality 0.5M45 01:50–02:00: quality 0.6M45 02:00–02:10: quality 0.7M45 02:10–03:50: quality 0.8M45 03:50–04:50: quality 0.9M45 04:50–05:05: quality 1.0M45 05:05–05:40: quality 0.5M45 05:40–06:00: quality 0.1M45 06:00–06:15: quality 0.2observe M45 03:10–04:55NGC 7000NGC 7000 21:00–21:10: quality 0.1NGC 7000 21:10–21:50: quality 0.2NGC 7000 21:50–22:00: quality 0.4NGC 7000 22:00–23:00: quality 0.5NGC 7000 23:00–00:00: quality 0.7NGC 7000 00:00–01:00: quality 0.8NGC 7000 01:00–02:00: quality 0.9NGC 7000 02:00–02:55: quality 1.0NGC 7000 02:55–04:25: quality 0.9NGC 7000 04:25–05:05: quality 0.8NGC 7000 05:05–05:40: quality 0.4NGC 7000 05:40–06:15: quality 0.1observe NGC 7000 21:50–23:10V1057 CygV1057 Cyg 21:00–21:10: quality 0.1V1057 Cyg 21:10–21:50: quality 0.2V1057 Cyg 21:50–22:00: quality 0.4V1057 Cyg 22:00–23:00: quality 0.5V1057 Cyg 23:00–00:00: quality 0.7V1057 Cyg 00:00–01:00: quality 0.8V1057 Cyg 01:00–02:00: quality 0.9V1057 Cyg 02:00–02:55: quality 1.0V1057 Cyg 02:55–04:25: quality 0.9V1057 Cyg 04:25–05:05: quality 0.8V1057 Cyg 05:05–05:40: quality 0.4V1057 Cyg 05:40–06:15: quality 0.1observe V1057 Cyg 23:10–00:30M33M33 22:40–22:50: quality 0.2M33 22:50–23:00: quality 0.3M33 23:00–23:15: quality 0.4M33 23:15–23:35: quality 0.5M33 23:35–00:00: quality 0.6M33 00:00–01:00: quality 0.7M33 01:00–01:55: quality 0.8M33 01:55–02:15: quality 0.9M33 02:15–03:00: quality 1.0M33 03:00–04:00: quality 0.9M33 04:00–05:05: quality 1.0M33 05:05–05:40: quality 0.5M33 05:40–06:00: quality 0.1M33 06:00–06:15: quality 0.2observe M33 01:50–03:10scheduleNGC 7000V1057 CygM31M33M4522:0000:0002:0004:0006:00

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
20:05–21:50 — nothing worth pointing at — 1.75
21:50–23:10 NGC 7000 1.33 0.55
23:10–00:30 V1057 Cyg 1.33 0.74
00:30–01:50 M31 1.33 0.84
01:50–03:10 M33 1.33 0.93
03:10–04:55 M45 1.75 0.88
04:55–05:05 M42 0.17 0.43
05:05–05:35 M31 0.5 0.49
05:35–05:40 M42 0.08 0.34
05:40–06:45 — nothing worth pointing at — 1.08

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 100 83 23:00–05:05 (good) 89.5° at 03:45 141.2° 1.83
M42 Great Orion Nebula 4 4 05:25–05:40 (marginal) 42.9° at 08:40 99.2° 0.25
M45 Seven Sisters 89 84 01:55–05:05 (good) 72.5° at 06:50 124.5° 1.75
NGC 7000 North America Nebula 100 80 23:00–05:05 (good) 87.2° at 00:05 120.6° 1.33
V1057 Cyg 100 80 23:00–05:05 (good) 87.3° at 00:05 120.6° 1.33
M33 Triangulum Pinwheel 100 88 00:00–05:05 (good) 79.1° at 04:40 146.4° 1.33
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2025-08-25"

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"}.