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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 Saturday, 06 September 2025 · astronomical night 21:22 → 05:16 (7.9 h) · Moon 99% (full moon) · weather: ERA5 history

M31M31 20:50–21:25: quality 0.2M31 21:25–02:15: quality 0.5M31 02:15–03:00: quality 0.6M31 03:00–04:40: quality 0.4M31 04:40–05:00: quality 0.5M31 05:00–05:20: quality 0.6M31 05:20–05:55: quality 0.3M31 05:55–06:25: quality 0.1observe M31 00:00–01:30M42M42 04:05–04:10: quality 0.2M42 04:10–04:35: quality 0.3M42 04:35–05:00: quality 0.4M42 05:00–05:20: quality 0.6M42 05:20–05:55: quality 0.3M42 05:55–06:25: quality 0.1observe M42 04:30–05:55M45M45 00:30–00:55: quality 0.3M45 00:55–01:10: quality 0.4M45 01:10–01:45: quality 0.5M45 01:45–03:00: quality 0.6M45 03:00–04:00: quality 0.4M45 04:00–05:00: quality 0.5M45 05:00–05:20: quality 0.7M45 05:20–05:55: quality 0.4M45 05:55–06:25: quality 0.1observe M45 01:30–03:00NGC 7000NGC 7000 20:15–20:50: quality 0.1NGC 7000 20:50–21:25: quality 0.3NGC 7000 21:25–22:55: quality 0.6NGC 7000 22:55–03:00: quality 0.5NGC 7000 03:00–04:00: quality 0.3NGC 7000 04:00–05:00: quality 0.4NGC 7000 05:00–05:10: quality 0.5NGC 7000 05:10–05:20: quality 0.4NGC 7000 05:20–05:55: quality 0.2observe NGC 7000 21:00–22:30V1057 CygV1057 Cyg 20:15–20:50: quality 0.1V1057 Cyg 20:50–21:25: quality 0.3V1057 Cyg 21:25–22:55: quality 0.6V1057 Cyg 22:55–03:00: quality 0.5V1057 Cyg 03:00–04:00: quality 0.3V1057 Cyg 04:00–05:00: quality 0.4V1057 Cyg 05:00–05:10: quality 0.5V1057 Cyg 05:10–05:20: quality 0.4V1057 Cyg 05:20–05:55: quality 0.2observe V1057 Cyg 22:30–00:00M33M33 21:55–22:00: quality 0.2M33 22:00–22:25: quality 0.3M33 22:25–22:50: quality 0.4M33 22:50–00:00: quality 0.5M33 00:00–00:20: quality 0.4M33 00:20–02:10: quality 0.5M33 02:10–03:00: quality 0.6M33 03:00–04:40: quality 0.4M33 04:40–05:00: quality 0.5M33 05:00–05:20: quality 0.6M33 05:20–05:55: quality 0.3M33 05:55–06:25: quality 0.1observe M33 03:00–04:30scheduleNGC 7000V1057 CygM31M45M33M4220:0022:0000:0002:0004:0006:00

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
19:45–21:00 — nothing worth pointing at — 1.25
21:00–22:30 NGC 7000 1.5 0.5
22:30–00:00 V1057 Cyg 1.5 0.54
00:00–01:30 M31 1.5 0.5
01:30–03:00 M45 1.5 0.59
03:00–04:30 M33 1.5 0.39
04:30–05:55 M42 1.42 0.41
05:55–06:55 — nothing worth pointing at — 1.0

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 67 59 05:00–05:20 (good) 89.7° at 03:00 61.6° 1.5
M42 Great Orion Nebula 16 13 05:05–05:20 (good) 42.9° at 07:50 106.2° 1.42
M45 Seven Sisters 64 52 02:30–03:00 (good) 72.5° at 06:05 86.2° 1.5
NGC 7000 North America Nebula 61 54 21:00–05:20 (marginal) 87.3° at 23:15 59.0° 1.5
V1057 Cyg 61 54 21:00–05:20 (marginal) 87.3° at 23:15 59.0° 1.5
M33 Triangulum Pinwheel 67 58 05:00–05:20 (good) 79.1° at 03:50 61.9° 1.5
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2025-09-06"

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"}.