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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 Thursday, 13 November 2025 · astronomical night 18:38 → 05:32 (10.91 h) · Moon 33% (waning crescent) · weather: ERA5 history

M31M31 17:35–18:10: quality 0.1M31 18:10–18:40: quality 0.5M31 18:40–01:00: quality 1.0M31 01:00–02:00: quality 0.9M31 02:00–03:15: quality 0.8M31 03:15–03:30: quality 0.7M31 03:30–03:45: quality 0.6M31 03:45–04:00: quality 0.5M31 04:00–04:15: quality 0.3observe M31 21:50–23:40M42M42 22:40–22:45: quality 0.4M42 22:45–23:00: quality 0.5M42 23:00–23:20: quality 0.6M42 23:20–23:35: quality 0.7M42 23:35–00:45: quality 0.8M42 00:45–01:25: quality 0.9M42 01:25–04:00: quality 0.8M42 04:00–05:00: quality 0.5M42 05:00–05:35: quality 0.1M42 06:00–06:10: quality 0.2observe M42 03:20–05:00M45M45 19:05–19:10: quality 0.4M45 19:10–19:25: quality 0.5M45 19:25–19:40: quality 0.6M45 19:40–19:55: quality 0.7M45 19:55–20:35: quality 0.8M45 20:35–22:00: quality 0.9M45 22:00–01:40: quality 1.0M45 01:40–03:50: quality 0.9M45 03:50–04:00: quality 0.8M45 04:00–05:00: quality 0.5M45 05:00–05:35: quality 0.1M45 06:00–06:10: quality 0.2observe M45 01:30–03:20NGC 7000NGC 7000 17:35–18:10: quality 0.1NGC 7000 18:10–18:40: quality 0.5NGC 7000 18:40–21:20: quality 1.0NGC 7000 21:20–22:50: quality 0.9NGC 7000 22:50–23:45: quality 0.8NGC 7000 23:45–00:00: quality 0.7NGC 7000 00:00–00:15: quality 0.6NGC 7000 00:15–00:35: quality 0.5NGC 7000 00:35–00:45: quality 0.4observe NGC 7000 18:10–20:00V1057 CygV1057 Cyg 17:35–18:10: quality 0.1V1057 Cyg 18:10–18:40: quality 0.5V1057 Cyg 18:40–21:20: quality 1.0V1057 Cyg 21:20–22:50: quality 0.9V1057 Cyg 22:50–23:45: quality 0.8V1057 Cyg 23:45–00:00: quality 0.7V1057 Cyg 00:00–00:15: quality 0.6V1057 Cyg 00:15–00:35: quality 0.5V1057 Cyg 00:35–00:45: quality 0.4observe V1057 Cyg 20:00–21:50M33M33 17:35–18:10: quality 0.1M33 18:10–18:40: quality 0.4M33 18:40–19:45: quality 0.9M33 19:45–01:25: quality 1.0M33 01:25–02:25: quality 0.9M33 02:25–03:30: quality 0.8M33 03:30–03:45: quality 0.7M33 03:45–04:00: quality 0.6M33 04:00–04:25: quality 0.3observe M33 23:40–01:30scheduleNGC 7000V1057 CygM31M33M45M4218:0020:0022:0000:0002:0004:0006:00

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
17:00–18:10 — nothing worth pointing at — 1.17
18:10–20:00 NGC 7000 1.83 0.84
20:00–21:50 V1057 Cyg 1.83 0.97
21:50–23:40 M31 1.83 1.0
23:40–01:30 M33 1.83 0.99
01:30–03:20 M45 1.83 0.93
03:20–05:00 M42 1.67 0.6
05:00–07:10 — nothing worth pointing at — 2.17

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 100 99 18:40–03:35 (good) 89.5° at 21:35 125.1° 1.83
M42 Great Orion Nebula 87 76 23:10–04:00 (good) 42.9° at 02:25 80.3° 1.67
M45 Seven Sisters 100 92 19:30–04:00 (good) 72.5° at 00:35 101.9° 1.83
NGC 7000 North America Nebula 100 99 18:40–00:10 (good) 87.3° at 17:50 122.1° 1.83
V1057 Cyg 100 99 18:40–00:10 (good) 87.3° at 17:50 122.2° 1.83
M33 Triangulum Pinwheel 100 99 18:40–03:50 (good) 79.1° at 22:25 125.8° 1.83
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2025-11-13"

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"}.