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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, 04 October 2025 · astronomical night 20:29 → 05:49 (9.33 h) · Moon 93% (waxing gibbous) · weather: ERA5 history

M31M31 20:00–20:30: quality 0.2M31 20:30–21:00: quality 0.4M31 21:00–22:00: quality 0.5M31 22:00–23:00: quality 0.4M31 23:00–01:10: quality 0.5M31 01:10–03:50: quality 0.6M31 03:50–05:00: quality 0.7M31 05:00–05:50: quality 0.9M31 05:50–06:25: quality 0.4M31 06:25–06:55: quality 0.1observe M31 01:30–03:10M42M42 02:15–02:20: quality 0.3M42 02:20–02:40: quality 0.4M42 02:40–03:00: quality 0.5M42 03:00–03:20: quality 0.6M42 03:20–05:00: quality 0.7M42 05:00–05:50: quality 0.9M42 05:50–06:25: quality 0.4M42 06:25–06:55: quality 0.1observe M42 04:50–06:25M45M45 22:40–22:50: quality 0.2M45 22:50–23:10: quality 0.3M45 23:10–23:35: quality 0.4M45 23:35–00:05: quality 0.5M45 00:05–01:40: quality 0.6M45 01:40–04:00: quality 0.7M45 04:00–05:00: quality 0.8M45 05:00–05:50: quality 1.0M45 05:50–06:25: quality 0.5M45 06:25–06:55: quality 0.1observe M45 23:50–01:30NGC 7000NGC 7000 20:00–20:25: quality 0.3NGC 7000 20:25–20:30: quality 0.2NGC 7000 20:30–21:00: quality 0.5NGC 7000 21:00–21:40: quality 0.6NGC 7000 21:40–22:35: quality 0.5NGC 7000 22:35–23:00: quality 0.4NGC 7000 23:00–03:30: quality 0.5NGC 7000 03:30–04:00: quality 0.4NGC 7000 04:00–04:20: quality 0.3observe NGC 7000 20:30–22:10V1057 CygV1057 Cyg 20:00–20:25: quality 0.3V1057 Cyg 20:25–20:30: quality 0.2V1057 Cyg 20:30–21:00: quality 0.5V1057 Cyg 21:00–21:40: quality 0.6V1057 Cyg 21:40–22:35: quality 0.5V1057 Cyg 22:35–23:00: quality 0.4V1057 Cyg 23:00–03:30: quality 0.5V1057 Cyg 03:30–04:00: quality 0.4V1057 Cyg 04:00–04:20: quality 0.3observe V1057 Cyg 22:10–23:50M33M33 20:05–20:30: quality 0.1M33 20:30–20:55: quality 0.3M33 20:55–21:40: quality 0.4M33 21:40–22:00: quality 0.5M33 22:00–23:25: quality 0.4M33 23:25–01:20: quality 0.5M33 01:20–03:50: quality 0.6M33 03:50–05:00: quality 0.7M33 05:00–05:05: quality 1.0M33 05:05–05:50: quality 0.9M33 05:50–06:25: quality 0.4M33 06:25–06:55: quality 0.1observe M33 03:10–04:50scheduleNGC 7000V1057 CygM45M31M33M4220:0022:0000:0002:0004:0006:00

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
18:55–20:30 — nothing worth pointing at — 1.58
20:30–22:10 NGC 7000 1.67 0.53
22:10–23:50 V1057 Cyg 1.67 0.46
23:50–01:30 M45 1.67 0.58
01:30–03:10 M31 1.67 0.59
03:10–04:50 M33 1.67 0.65
04:50–06:25 M42 1.58 0.7
06:25–07:25 — nothing worth pointing at — 1.0

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 92 88 02:40–05:50 (good) 89.7° at 01:10 55.1° 1.67
M42 Great Orion Nebula 61 61 03:10–05:50 (good) 42.9° at 06:00 99.7° 1.58
M45 Seven Sisters 100 99 00:55–05:50 (good) 72.5° at 04:15 78.2° 1.67
NGC 7000 North America Nebula 60 56 20:30–04:15 (marginal) 87.3° at 21:25 58.1° 1.67
V1057 Cyg 60 56 20:30–04:15 (marginal) 87.3° at 21:25 58.1° 1.67
M33 Triangulum Pinwheel 95 92 02:45–05:50 (good) 79.1° at 02:00 54.4° 1.67
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2025-10-04"

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"}.