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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 Friday, 21 September 2040 · astronomical night 20:52 → 05:35 (8.71 h) · Moon 98% (full moon) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 19:50–20:20: quality 0.1M31 20:20–20:55: quality 0.2M31 20:55–22:40: quality 0.5M31 22:40–05:40: quality 0.4M31 05:40–06:10: quality 0.2M31 06:10–06:45: quality 0.1observe M31 23:30–01:05M42M42 03:05–03:15: quality 0.2M42 03:15–03:45: quality 0.3M42 03:45–04:10: quality 0.4M42 04:10–05:40: quality 0.5M42 05:40–06:10: quality 0.3M42 06:10–06:45: quality 0.1observe M42 04:10–05:40M45M45 23:30–23:50: quality 0.2M45 23:50–01:05: quality 0.3M45 01:05–05:00: quality 0.4M45 05:00–05:40: quality 0.5M45 05:40–06:05: quality 0.2M45 06:05–06:10: quality 0.3M45 06:10–06:45: quality 0.1observe M45 01:05–02:40NGC 7000NGC 7000 19:50–20:10: quality 0.2NGC 7000 20:10–20:20: quality 0.1NGC 7000 20:20–20:55: quality 0.4NGC 7000 20:55–21:55: quality 0.7NGC 7000 21:55–00:50: quality 0.6NGC 7000 00:50–03:35: quality 0.5NGC 7000 03:35–04:35: quality 0.4NGC 7000 04:35–05:05: quality 0.3NGC 7000 05:05–05:10: quality 0.2observe NGC 7000 20:20–21:55V1057 CygV1057 Cyg 19:50–20:10: quality 0.2V1057 Cyg 20:10–20:20: quality 0.1V1057 Cyg 20:20–20:55: quality 0.4V1057 Cyg 20:55–21:55: quality 0.7V1057 Cyg 21:55–00:50: quality 0.6V1057 Cyg 00:50–03:35: quality 0.5V1057 Cyg 03:35–04:30: quality 0.4V1057 Cyg 04:30–05:05: quality 0.3V1057 Cyg 05:05–05:10: quality 0.2observe V1057 Cyg 21:55–23:30M33M33 20:55–21:05: quality 0.2M33 21:05–21:40: quality 0.3M33 21:40–23:35: quality 0.4M33 23:35–04:40: quality 0.3M33 04:40–05:40: quality 0.4M33 05:40–06:10: quality 0.2M33 06:10–06:45: quality 0.1observe M33 02:40–04:10scheduleNGC 7000V1057 CygM31M45M33M4220:0022:0000:0002:0004:0006:00

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
19:15–20:20 — nothing worth pointing at — 1.08
20:20–21:55 NGC 7000 1.58 0.56
21:55–23:30 V1057 Cyg 1.58 0.62
23:30–01:05 M31 1.58 0.4
01:05–02:40 M45 1.58 0.36
02:40–04:10 M33 1.5 0.31
04:10–05:40 M42 1.5 0.49
05:40–07:10 — nothing worth pointing at — 1.5

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 47 unknown 20:55–05:40 (marginal) 89.8° at 02:00 38.6° 1.58
M42 Great Orion Nebula 17 unknown 03:30–05:40 (marginal) 42.9° at 06:50 68.9° 1.5
M45 Seven Sisters 30 unknown 00:10–05:40 (marginal) 72.5° at 05:05 45.1° 1.58
NGC 7000 North America Nebula 70 unknown 20:55–23:10 (good) 87.2° at 22:15 67.3° 1.58
V1057 Cyg 70 unknown 20:55–23:10 (good) 87.3° at 22:15 67.3° 1.58
M33 Triangulum Pinwheel 29 unknown 21:20–05:40 (marginal) 79.2° at 02:50 28.8° 1.5
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2040-09-21"

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"}.