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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 Tuesday, 28 October 2025 · astronomical night 18:54 → 05:15 (10.36 h) · Moon 42% (waxing crescent) · weather: ERA5 history

M31M31 17:50–18:25: quality 0.1M31 18:25–18:55: quality 0.4M31 18:55–19:10: quality 0.8M31 19:10–20:00: quality 0.9M31 20:00–21:00: quality 0.8M31 21:00–22:05: quality 0.9M31 22:05–02:00: quality 1.0M31 02:00–03:25: quality 0.9M31 03:25–04:20: quality 0.8M31 04:20–04:35: quality 0.7M31 04:35–04:50: quality 0.6M31 04:50–05:10: quality 0.5M31 05:10–05:15: quality 0.4observe M31 20:20–22:15M42M42 23:40–23:50: quality 0.4M42 23:50–00:05: quality 0.5M42 00:05–00:20: quality 0.6M42 00:20–00:40: quality 0.7M42 00:40–01:50: quality 0.8M42 01:50–05:10: quality 0.9M42 05:10–05:20: quality 0.8M42 05:20–05:50: quality 0.4M42 05:50–06:25: quality 0.1observe M42 04:00–05:50M45M45 20:05–20:20: quality 0.4M45 20:20–20:35: quality 0.5M45 20:35–20:50: quality 0.6M45 20:50–21:00: quality 0.7M45 21:00–22:05: quality 0.8M45 22:05–23:00: quality 0.9M45 23:00–04:20: quality 1.0M45 04:20–05:20: quality 0.9M45 05:20–05:50: quality 0.4M45 05:50–06:25: quality 0.1observe M45 02:05–04:00NGC 7000NGC 7000 17:50–18:25: quality 0.1NGC 7000 18:25–18:55: quality 0.4NGC 7000 18:55–20:00: quality 0.9NGC 7000 20:00–21:00: quality 0.8NGC 7000 21:00–22:05: quality 0.9NGC 7000 22:05–22:20: quality 1.0NGC 7000 22:20–23:50: quality 0.9NGC 7000 23:50–00:45: quality 0.8NGC 7000 00:45–01:05: quality 0.7NGC 7000 01:05–01:20: quality 0.6NGC 7000 01:20–01:40: quality 0.5NGC 7000 01:40–01:45: quality 0.4observe NGC 7000 18:25–20:20V1057 CygV1057 Cyg 17:50–18:25: quality 0.1V1057 Cyg 18:25–18:55: quality 0.4V1057 Cyg 18:55–20:00: quality 0.9V1057 Cyg 20:00–21:00: quality 0.8V1057 Cyg 21:00–22:05: quality 0.9V1057 Cyg 22:05–22:20: quality 1.0V1057 Cyg 22:20–23:50: quality 0.9V1057 Cyg 23:50–00:45: quality 0.8V1057 Cyg 00:45–01:05: quality 0.7V1057 Cyg 01:05–01:20: quality 0.6V1057 Cyg 01:20–01:35: quality 0.5V1057 Cyg 01:35–01:45: quality 0.4observe V1057 Cyg 22:15–00:10M33M33 17:50–18:25: quality 0.1M33 18:25–18:55: quality 0.4M33 18:55–21:00: quality 0.8M33 21:00–22:05: quality 0.9M33 22:05–02:30: quality 1.0M33 02:30–03:50: quality 0.9M33 03:50–04:40: quality 0.8M33 04:40–04:50: quality 0.7M33 04:50–05:05: quality 0.6M33 05:05–05:20: quality 0.5M33 05:20–05:25: quality 0.2observe M33 00:10–02:05scheduleNGC 7000M31V1057 CygM33M45M4218:0020:0022:0000:0002:0004:0006:00

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
17:20–18:25 — nothing worth pointing at — 1.08
18:25–20:20 NGC 7000 1.92 0.73
20:20–22:15 M31 1.92 0.9
22:15–00:10 V1057 Cyg 1.92 0.89
00:10–02:05 M33 1.92 1.0
02:05–04:00 M45 1.92 1.0
04:00–05:50 M42 1.83 0.74
05:50–06:50 — nothing worth pointing at — 1.0

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 100 99 18:55–04:45 (good) 89.7° at 22:35 92.9° 1.92
M42 Great Orion Nebula 89 89 00:15–05:20 (good) 42.9° at 03:25 133.9° 1.83
M45 Seven Sisters 100 99 20:45–05:20 (good) 72.5° at 01:40 122.9° 1.92
NGC 7000 North America Nebula 97 96 18:55–01:10 (good) 87.2° at 18:50 70.3° 1.92
V1057 Cyg 97 96 18:55–01:10 (good) 87.3° at 18:50 70.2° 1.92
M33 Triangulum Pinwheel 100 99 18:55–05:00 (good) 79.1° at 23:25 97.2° 1.92
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2025-10-28"

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"}.