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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, 25 September 2040 · astronomical night 20:45 → 05:40 (8.92 h) · Moon 71% (waning gibbous) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 19:45–20:15: quality 0.1M31 20:15–20:50: quality 0.4M31 20:50–21:00: quality 0.8M31 21:00–22:00: quality 0.9M31 22:00–00:45: quality 0.7M31 00:45–04:15: quality 0.6M31 04:15–05:45: quality 0.5M31 05:45–06:15: quality 0.2M31 06:15–06:50: quality 0.1observe M31 23:35–01:15M42M42 02:50–03:05: quality 0.2M42 03:05–03:45: quality 0.3M42 03:45–05:45: quality 0.4M42 05:45–06:15: quality 0.2M42 06:15–06:50: quality 0.1observe M42 04:35–05:45M45M45 23:15–23:35: quality 0.3M45 23:35–00:00: quality 0.4M45 00:00–04:40: quality 0.5M45 04:40–05:45: quality 0.4M45 05:45–06:15: quality 0.2M45 06:15–06:50: quality 0.1observe M45 02:55–04:35NGC 7000NGC 7000 19:45–20:15: quality 0.2NGC 7000 20:15–20:50: quality 0.5NGC 7000 20:50–22:00: quality 1.0NGC 7000 22:00–22:30: quality 0.9NGC 7000 22:30–01:25: quality 0.8NGC 7000 01:25–02:50: quality 0.7NGC 7000 02:50–03:55: quality 0.6NGC 7000 03:55–04:20: quality 0.5NGC 7000 04:20–04:40: quality 0.4NGC 7000 04:40–04:55: quality 0.3observe NGC 7000 20:15–21:55V1057 CygV1057 Cyg 19:45–20:15: quality 0.2V1057 Cyg 20:15–20:50: quality 0.5V1057 Cyg 20:50–22:00: quality 1.0V1057 Cyg 22:00–22:35: quality 0.9V1057 Cyg 22:35–01:25: quality 0.8V1057 Cyg 01:25–02:50: quality 0.7V1057 Cyg 02:50–03:55: quality 0.6V1057 Cyg 03:55–04:20: quality 0.5V1057 Cyg 04:20–04:40: quality 0.4V1057 Cyg 04:40–04:55: quality 0.3observe V1057 Cyg 21:55–23:35M33M33 20:40–20:50: quality 0.2M33 20:50–21:00: quality 0.5M33 21:00–21:15: quality 0.6M33 21:15–21:30: quality 0.7M33 21:30–22:00: quality 0.8M33 22:00–02:15: quality 0.6M33 02:15–05:45: quality 0.5M33 05:45–06:15: quality 0.2M33 06:15–06:50: quality 0.1observe M33 01:15–02:55scheduleNGC 7000V1057 CygM31M33M45M4220:0022:0000:0002:0004:0006:00

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
19:10–20:15 — nothing worth pointing at — 1.08
20:15–21:55 NGC 7000 1.67 0.82
21:55–23:35 V1057 Cyg 1.67 0.85
23:35–01:15 M31 1.67 0.67
01:15–02:55 M33 1.67 0.56
02:55–04:35 M45 1.67 0.47
04:35–05:45 M42 1.17 0.39
05:45–07:15 — nothing worth pointing at — 1.5

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 92 unknown 20:50–02:10 (good) 89.8° at 01:45 49.6° 1.67
M42 Great Orion Nebula 12 unknown 03:25–05:45 (marginal) 42.9° at 06:35 33.0° 1.17
M45 Seven Sisters 38 unknown 23:25–05:45 (marginal) 72.5° at 04:50 8.9° 1.67
NGC 7000 North America Nebula 100 unknown 20:50–03:40 (good) 87.2° at 22:00 88.3° 1.67
V1057 Cyg 100 unknown 20:50–03:40 (good) 87.3° at 22:00 88.4° 1.67
M33 Triangulum Pinwheel 83 unknown 21:10–01:00 (good) 79.2° at 02:35 38.7° 1.67
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2040-09-25"

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"}.