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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, 27 October 2025 · astronomical night 18:55 → 05:14 (10.32 h) · Moon 33% (waxing crescent) · weather: ERA5 history

M31M31 17:55–18:25: quality 0.1M31 18:25–19:00: quality 0.4M31 19:00–19:20: quality 0.6M31 19:20–20:00: quality 0.7M31 20:00–20:20: quality 0.9M31 20:20–01:00: quality 1.0M31 04:00–04:25: quality 0.4M31 04:25–05:00: quality 0.3M31 05:00–05:15: quality 0.5M31 05:15–05:20: quality 0.2observe M31 21:15–22:40M42M42 23:45–23:55: quality 0.4M42 23:55–00:15: quality 0.5M42 00:15–00:30: quality 0.6M42 00:30–00:50: quality 0.7M42 00:50–01:00: quality 0.8M42 04:00–05:00: quality 0.4M42 05:00–05:15: quality 0.9M42 05:15–05:50: quality 0.4M42 05:50–06:20: quality 0.1observe M42 04:30–05:50M45M45 20:10–20:20: quality 0.4M45 20:20–20:30: quality 0.5M45 20:30–20:45: quality 0.6M45 20:45–21:00: quality 0.7M45 21:00–21:45: quality 0.8M45 21:45–23:05: quality 0.9M45 23:05–01:00: quality 1.0M45 04:00–04:15: quality 0.5M45 04:15–05:00: quality 0.4M45 05:00–05:15: quality 0.9M45 05:15–05:50: quality 0.4M45 05:50–06:20: quality 0.1observe M45 00:05–01:00observe M45 04:00–04:30NGC 7000NGC 7000 17:55–18:25: quality 0.1NGC 7000 18:25–19:00: quality 0.4NGC 7000 19:00–20:00: quality 0.7NGC 7000 20:00–21:00: quality 0.9NGC 7000 21:00–22:25: quality 1.0NGC 7000 22:25–23:55: quality 0.9NGC 7000 23:55–00:45: quality 0.8NGC 7000 00:45–01:00: quality 0.7observe NGC 7000 18:25–19:50V1057 CygV1057 Cyg 17:55–18:25: quality 0.1V1057 Cyg 18:25–19:00: quality 0.4V1057 Cyg 19:00–20:00: quality 0.7V1057 Cyg 20:00–21:00: quality 0.9V1057 Cyg 21:00–22:25: quality 1.0V1057 Cyg 22:25–23:55: quality 0.9V1057 Cyg 23:55–00:45: quality 0.8V1057 Cyg 00:45–01:00: quality 0.7observe V1057 Cyg 19:50–21:15M33M33 17:55–18:25: quality 0.1M33 18:25–19:00: quality 0.3M33 19:00–20:00: quality 0.6M33 20:00–21:00: quality 0.9M33 21:00–01:00: quality 1.0M33 04:00–04:40: quality 0.4M33 04:40–05:00: quality 0.3M33 05:00–05:10: quality 0.6M33 05:10–05:15: quality 0.5M33 05:15–05:30: quality 0.2observe M33 22:40–00:05scheduleNGC 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
17:20–18:25 — nothing worth pointing at — 1.08
18:25–19:50 NGC 7000 1.42 0.55
19:50–21:15 V1057 Cyg 1.42 0.9
21:15–22:40 M31 1.42 1.0
22:40–00:05 M33 1.42 1.0
00:05–01:00 M45 0.92 0.96
01:00–04:00 — nothing worth pointing at — 3.0
04:00–04:30 M45 0.5 0.45
04:30–05:50 M42 1.33 0.5
05:50–06:50 — nothing worth pointing at — 1.0

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 100 65 19:00–01:00 (good) 89.7° at 22:40 103.5° 1.42
M42 Great Orion Nebula 89 31 00:20–01:00 (good) 42.9° at 03:30 140.8° 1.33
M45 Seven Sisters 100 59 20:40–01:00 (good) 72.5° at 01:45 135.2° 1.42
NGC 7000 North America Nebula 100 87 19:00–01:00 (good) 87.3° at 18:55 76.0° 1.42
V1057 Cyg 100 87 19:00–01:00 (good) 87.3° at 18:55 75.9° 1.42
M33 Triangulum Pinwheel 100 64 19:30–01:00 (good) 79.1° at 23:30 109.0° 1.42
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2025-10-27"

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"}.