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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, 03 September 2025 · astronomical night 21:28 → 05:12 (7.74 h) · Moon 83% (waxing gibbous) · weather: ERA5 history

M31M31 23:00–00:00: quality 0.3M31 00:00–01:00: quality 0.2M31 01:00–02:00: quality 0.5M31 02:00–02:30: quality 0.6M31 02:30–03:00: quality 0.7M31 03:00–04:00: quality 0.3M31 04:00–05:00: quality 0.6M31 05:00–05:15: quality 0.4M31 05:15–05:50: quality 0.2M31 05:50–06:00: quality 0.1observe M31 23:45–00:00observe M31 01:00–01:30observe M31 05:10–05:15M42M42 04:20–04:45: quality 0.3M42 04:45–05:00: quality 0.4M42 05:00–05:15: quality 0.3M42 05:15–05:20: quality 0.1M42 05:20–05:50: quality 0.2M45M45 00:40–01:00: quality 0.1M45 01:00–01:20: quality 0.3M45 01:20–02:00: quality 0.4M45 02:00–03:00: quality 0.6M45 03:00–04:00: quality 0.2M45 04:00–05:00: quality 0.6M45 05:00–05:15: quality 0.4M45 05:15–05:50: quality 0.2M45 05:50–06:00: quality 0.1observe M45 02:10–02:50NGC 7000NGC 7000 20:55–21:00: quality 0.1NGC 7000 23:00–00:00: quality 0.3NGC 7000 00:00–01:00: quality 0.1NGC 7000 01:00–02:00: quality 0.4NGC 7000 02:00–02:30: quality 0.6NGC 7000 02:30–03:00: quality 0.7NGC 7000 03:00–04:00: quality 0.2NGC 7000 04:00–05:00: quality 0.5NGC 7000 05:00–05:15: quality 0.3NGC 7000 05:15–05:20: quality 0.2NGC 7000 05:20–05:50: quality 0.1observe NGC 7000 04:00–04:40V1057 CygV1057 Cyg 20:55–21:00: quality 0.1V1057 Cyg 23:00–00:00: quality 0.3V1057 Cyg 00:00–01:00: quality 0.1V1057 Cyg 01:00–02:00: quality 0.4V1057 Cyg 02:00–02:30: quality 0.6V1057 Cyg 02:30–03:00: quality 0.7V1057 Cyg 03:00–04:00: quality 0.2V1057 Cyg 04:00–05:00: quality 0.5V1057 Cyg 05:00–05:15: quality 0.3V1057 Cyg 05:15–05:20: quality 0.2V1057 Cyg 05:20–05:50: quality 0.1observe V1057 Cyg 02:50–03:00observe V1057 Cyg 04:40–05:10M33M33 23:00–00:00: quality 0.3M33 00:00–00:15: quality 0.1M33 00:15–01:00: quality 0.2M33 01:00–01:05: quality 0.4M33 01:05–02:00: quality 0.5M33 02:00–02:30: quality 0.6M33 02:30–03:00: quality 0.7M33 03:00–04:00: quality 0.3M33 04:00–05:00: quality 0.6M33 05:00–05:15: quality 0.4M33 05:15–05:50: quality 0.2M33 05:50–06:00: quality 0.1observe M33 01:30–02:10scheduleM33M45NGC 700020:0022:0000:0002:0004:0006:00

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
19:50–23:45 — nothing worth pointing at — 3.92
23:45–00:00 M31 0.25 0.3
00:00–01:00 — nothing worth pointing at — 1.0
01:00–01:30 M31 0.5 0.47
01:30–02:10 M33 0.67 0.51
02:10–02:50 M45 0.67 0.6
02:50–03:00 V1057 Cyg 0.17 0.68
03:00–04:00 — nothing worth pointing at — 1.0
04:00–04:40 NGC 7000 0.67 0.52
04:40–05:10 V1057 Cyg 0.5 0.44
05:10–05:15 M31 0.08 0.39
05:15–06:55 — nothing worth pointing at — 1.67

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 100 38 02:00–03:00 (good) 89.6° at 03:10 96.1° 0.83
M42 Great Orion Nebula 16 8 04:30–05:00 (marginal) 42.9° at 08:05 135.9° 0.0
M45 Seven Sisters 100 49 04:05–05:00 (good) 72.5° at 06:15 126.5° 0.67
NGC 7000 North America Nebula 98 36 02:30–03:00 (good) 87.2° at 23:30 72.1° 0.67
V1057 Cyg 98 36 02:30–03:00 (good) 87.3° at 23:30 72.0° 0.67
M33 Triangulum Pinwheel 100 42 02:00–03:00 (good) 79.1° at 04:05 100.7° 0.67

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2025-09-03"

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"}.