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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, 08 September 2025 · astronomical night 21:18 → 05:19 (8.01 h) · Moon 98% (full moon) · weather: ERA5 history

M31M31 23:00–01:00: quality 0.1M31 01:00–02:00: quality 0.3M31 02:00–05:20: quality 0.4M31 05:20–05:55: quality 0.2M31 05:55–06:30: quality 0.1observe M31 03:15–04:00M42M42 04:00–04:20: quality 0.3M42 04:20–04:45: quality 0.4M42 04:45–05:20: quality 0.5M42 05:20–05:55: quality 0.3M42 05:55–06:30: quality 0.1observe M42 04:45–05:20M45M45 00:25–01:00: quality 0.1M45 01:00–02:00: quality 0.3M45 02:00–03:15: quality 0.4M45 03:15–05:20: quality 0.5M45 05:20–05:55: quality 0.3M45 05:55–06:30: quality 0.1observe M45 02:30–03:15NGC 7000NGC 7000 23:00–01:00: quality 0.1NGC 7000 01:00–02:00: quality 0.4NGC 7000 02:00–02:45: quality 0.5NGC 7000 02:45–05:20: quality 0.4NGC 7000 05:20–05:40: quality 0.2NGC 7000 05:40–05:55: quality 0.1observe NGC 7000 01:00–01:45V1057 CygV1057 Cyg 23:00–01:00: quality 0.1V1057 Cyg 01:00–02:00: quality 0.4V1057 Cyg 02:00–02:40: quality 0.5V1057 Cyg 02:40–05:20: quality 0.4V1057 Cyg 05:20–05:35: quality 0.2V1057 Cyg 05:35–05:55: quality 0.1observe V1057 Cyg 01:45–02:30M33M33 23:00–01:00: quality 0.1M33 01:00–03:35: quality 0.3M33 03:35–05:20: quality 0.4M33 05:20–05:55: quality 0.2M33 05:55–06:30: quality 0.1observe M33 04:00–04:45scheduleNGC 7000V1057 CygM45M31M3320:0022:0000:0002:0004:0006:00

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
19:40–01:00 — nothing worth pointing at — 5.33
01:00–01:45 NGC 7000 0.75 0.41
01:45–02:30 V1057 Cyg 0.75 0.44
02:30–03:15 M45 0.75 0.43
03:15–04:00 M31 0.75 0.38
04:00–04:45 M33 0.75 0.38
04:45–05:20 M42 0.58 0.51
05:20–07:00 — nothing worth pointing at — 1.67

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 40 22 01:00–05:20 (marginal) 89.5° at 02:50 40.1° 0.75
M42 Great Orion Nebula 11 11 04:10–05:20 (marginal) 42.9° at 07:45 82.5° 0.58
M45 Seven Sisters 32 29 01:10–05:20 (marginal) 72.5° at 05:55 57.6° 0.75
NGC 7000 North America Nebula 64 32 01:00–05:20 (marginal) 87.2° at 23:10 59.1° 0.75
V1057 Cyg 64 32 01:00–05:20 (marginal) 87.3° at 23:10 59.0° 0.75
M33 Triangulum Pinwheel 29 18 02:00–05:20 (marginal) 79.1° at 03:45 35.4° 0.75
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2025-09-08"

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"}.