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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, 25 October 2025 · astronomical night 19:57 → 05:12 (10.25 h) · Moon 17% (waxing crescent) · weather: ERA5 history

M31M31 18:55–19:30: quality 0.1M31 19:30–20:00: quality 0.4M31 20:00–20:45: quality 0.9M31 20:45–21:00: quality 1.0M31 21:00–22:00: quality 0.9M31 22:00–23:00: quality 0.2M31 00:00–01:00: quality 0.9M31 01:00–02:00: quality 0.5M31 02:00–03:00: quality 0.6M31 03:00–03:00: quality 0.2observe M31 21:20–22:00observe M31 00:00–00:30M42M42 00:55–01:00: quality 0.4M42 01:00–01:05: quality 0.2M42 01:05–01:35: quality 0.3M42 01:35–02:00: quality 0.4M42 02:00–03:00: quality 0.5M42 03:00–03:00: quality 0.2observe M42 02:20–03:00M45M45 21:15–21:30: quality 0.4M45 21:30–21:40: quality 0.5M45 21:40–21:55: quality 0.6M45 21:55–22:00: quality 0.7M45 22:00–23:00: quality 0.2M45 00:00–00:20: quality 0.8M45 00:20–01:00: quality 0.9M45 01:00–02:00: quality 0.5M45 02:00–03:00: quality 0.6M45 03:00–03:00: quality 0.2observe M45 01:25–02:20NGC 7000NGC 7000 18:55–19:30: quality 0.1NGC 7000 19:30–20:00: quality 0.5NGC 7000 20:00–20:15: quality 0.9NGC 7000 20:15–21:00: quality 1.0NGC 7000 21:00–22:00: quality 0.9NGC 7000 22:00–23:00: quality 0.2NGC 7000 00:00–01:00: quality 0.8NGC 7000 01:00–02:25: quality 0.4NGC 7000 02:25–02:55: quality 0.3NGC 7000 02:55–03:00: quality 0.2observe NGC 7000 19:30–20:25V1057 CygV1057 Cyg 18:55–19:30: quality 0.1V1057 Cyg 19:30–20:00: quality 0.5V1057 Cyg 20:00–20:15: quality 0.9V1057 Cyg 20:15–21:00: quality 1.0V1057 Cyg 21:00–22:00: quality 0.9V1057 Cyg 22:00–23:00: quality 0.2V1057 Cyg 00:00–01:00: quality 0.8V1057 Cyg 01:00–02:25: quality 0.4V1057 Cyg 02:25–02:55: quality 0.3V1057 Cyg 02:55–03:00: quality 0.2observe V1057 Cyg 20:25–21:20M33M33 18:55–19:30: quality 0.1M33 19:30–20:00: quality 0.4M33 20:00–20:35: quality 0.8M33 20:35–22:00: quality 0.9M33 22:00–23:00: quality 0.2M33 00:00–01:00: quality 0.9M33 01:00–02:00: quality 0.5M33 02:00–03:00: quality 0.6M33 03:00–03:00: quality 0.2observe M33 00:30–01:25scheduleNGC 7000V1057 CygM33M4520:0022:0000:0002:0004:0006:00

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
18:20–19:30 — nothing worth pointing at — 1.17
19:30–20:25 NGC 7000 0.92 0.7
20:25–21:20 V1057 Cyg 0.92 0.97
21:20–22:00 M31 0.67 0.94
22:00–00:00 — nothing worth pointing at — 2.0
00:00–00:30 M31 0.5 0.89
00:30–01:25 M33 0.92 0.72
01:25–02:20 M45 0.92 0.55
02:20–03:00 M42 0.67 0.5
03:00–06:50 — nothing worth pointing at — 4.83

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 100 47 20:00–22:00 (good) 89.5° at 23:45 123.5° 1.17
M42 Great Orion Nebula 89 21 01:20–03:00 (marginal) 42.9° at 03:40 146.1° 0.67
M45 Seven Sisters 100 33 00:00–01:00 (good) 72.5° at 02:50 159.2° 0.92
NGC 7000 North America Nebula 100 62 20:00–22:00 (good) 87.2° at 20:05 88.4° 0.92
V1057 Cyg 100 62 20:00–22:00 (good) 87.3° at 20:05 88.3° 0.92
M33 Triangulum Pinwheel 100 45 20:00–22:00 (good) 79.1° at 00:40 131.7° 0.92
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2025-10-25"

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"}.