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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 Wednesday, 24 September 2025 · astronomical night 20:47 → 05:38 (8.85 h) · Moon 9% (waxing crescent) · weather: ERA5 history

M31M31 19:45–20:15: quality 0.1M31 20:15–20:50: quality 0.4M31 20:50–22:00: quality 0.8M31 22:00–22:40: quality 0.9M31 22:40–04:00: quality 1.0M31 04:00–05:00: quality 0.6M31 05:00–05:35: quality 0.7M31 05:35–05:40: quality 0.6M31 05:40–06:00: quality 0.3observe M31 23:35–01:15M42M42 02:55–03:05: quality 0.4M42 03:05–03:25: quality 0.5M42 03:25–03:40: quality 0.6M42 03:40–04:00: quality 0.7M42 04:00–05:00: quality 0.5M42 05:00–05:40: quality 0.6M42 05:40–06:00: quality 0.3observe M42 04:35–06:00M45M45 23:20–23:25: quality 0.4M45 23:25–23:40: quality 0.5M45 23:40–23:55: quality 0.6M45 23:55–00:05: quality 0.7M45 00:05–00:55: quality 0.8M45 00:55–02:15: quality 0.9M45 02:15–04:00: quality 1.0M45 04:00–05:00: quality 0.6M45 05:00–05:40: quality 0.7M45 05:40–06:00: quality 0.4observe M45 02:55–04:35NGC 7000NGC 7000 19:45–20:15: quality 0.1NGC 7000 20:15–20:50: quality 0.5NGC 7000 20:50–21:00: quality 1.0NGC 7000 21:00–22:00: quality 0.9NGC 7000 22:00–01:35: quality 1.0NGC 7000 01:35–03:00: quality 0.9NGC 7000 03:00–03:55: quality 0.8NGC 7000 03:55–04:00: quality 0.7NGC 7000 04:00–04:25: quality 0.4NGC 7000 04:25–04:55: quality 0.3NGC 7000 04:55–05:00: quality 0.2observe NGC 7000 20:15–21:55V1057 CygV1057 Cyg 19:45–20:15: quality 0.1V1057 Cyg 20:15–20:50: quality 0.5V1057 Cyg 20:50–21:00: quality 1.0V1057 Cyg 21:00–22:00: quality 0.9V1057 Cyg 22:00–01:35: quality 1.0V1057 Cyg 01:35–03:00: quality 0.9V1057 Cyg 03:00–03:55: quality 0.8V1057 Cyg 03:55–04:00: quality 0.7V1057 Cyg 04:00–04:25: quality 0.4V1057 Cyg 04:25–04:55: quality 0.3V1057 Cyg 04:55–05:00: quality 0.2observe V1057 Cyg 21:55–23:35M33M33 20:45–20:50: quality 0.2M33 20:50–20:55: quality 0.4M33 20:55–21:15: quality 0.5M33 21:15–21:30: quality 0.6M33 21:30–22:00: quality 0.7M33 22:00–22:30: quality 0.8M33 22:30–23:50: quality 0.9M33 23:50–04:00: quality 1.0M33 04:00–05:00: quality 0.6M33 05:00–05:40: quality 0.7M33 05:40–06:00: quality 0.3observe M33 01:15–02:55scheduleNGC 7000V1057 CygM31M33M45M4220:0022:0000:0002:0004:0006:00

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
19:10–20:15 — nothing worth pointing at — 1.08
20:15–21:55 NGC 7000 1.67 0.76
21:55–23:35 V1057 Cyg 1.67 0.98
23:35–01:15 M31 1.67 1.0
01:15–02:55 M33 1.67 1.0
02:55–04:35 M45 1.67 0.83
04:35–06:00 M42 1.42 0.5
06:00–07:15 — nothing worth pointing at — 1.25

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 100 89 20:50–04:00 (good) 89.7° at 01:50 149.5° 1.67
M42 Great Orion Nebula 52 35 03:30–04:00 (good) 42.9° at 06:40 124.8° 1.42
M45 Seven Sisters 100 85 23:50–04:00 (good) 72.5° at 04:50 156.9° 1.67
NGC 7000 North America Nebula 100 95 20:50–04:00 (good) 87.3° at 22:05 110.4° 1.67
V1057 Cyg 100 95 20:50–04:00 (good) 87.3° at 22:05 110.4° 1.67
M33 Triangulum Pinwheel 100 89 21:20–04:00 (good) 79.1° at 02:40 164.2° 1.67
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2025-09-24"

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"}.