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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, 02 September 2031 · astronomical night 21:31 → 05:10 (7.66 h) · Moon 97% (waning gibbous) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 21:00–21:35: quality 0.2M31 21:35–05:15: quality 0.4M31 05:15–05:50: quality 0.2M31 05:50–06:25: quality 0.1observe M31 23:50–01:15M42M42 04:25–04:45: quality 0.3M42 04:45–05:05: quality 0.4M42 05:05–05:15: quality 0.5M42 05:15–05:20: quality 0.2M42 05:20–05:50: quality 0.3M42 05:50–06:25: quality 0.1observe M42 04:30–05:15M45M45 00:50–01:00: quality 0.2M45 01:00–01:30: quality 0.3M45 01:30–03:20: quality 0.4M45 03:20–05:15: quality 0.5M45 05:15–05:50: quality 0.3M45 05:50–06:25: quality 0.1observe M45 02:40–04:30NGC 7000NGC 7000 20:25–21:00: quality 0.1NGC 7000 21:00–21:35: quality 0.3NGC 7000 21:35–23:15: quality 0.6NGC 7000 23:15–03:00: quality 0.5NGC 7000 03:00–05:15: quality 0.4NGC 7000 05:15–05:50: quality 0.2observe NGC 7000 21:00–22:25V1057 CygV1057 Cyg 20:25–21:00: quality 0.1V1057 Cyg 21:00–21:35: quality 0.3V1057 Cyg 21:35–23:15: quality 0.6V1057 Cyg 23:15–03:00: quality 0.5V1057 Cyg 03:00–05:15: quality 0.4V1057 Cyg 05:15–05:50: quality 0.2observe V1057 Cyg 22:25–23:50M33M33 22:15–22:30: quality 0.2M33 22:30–23:10: quality 0.3M33 23:10–23:30: quality 0.4M33 23:30–03:45: quality 0.3M33 03:45–05:15: quality 0.4M33 05:15–05:50: quality 0.2M33 05:50–06:25: quality 0.1observe M33 01:15–02:40scheduleNGC 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
19:50–21:00 — nothing worth pointing at — 1.17
21:00–22:25 NGC 7000 1.42 0.49
22:25–23:50 V1057 Cyg 1.42 0.56
23:50–01:15 M31 1.42 0.39
01:15–02:40 M33 1.42 0.34
02:40–04:30 M45 1.83 0.46
04:30–05:15 M42 0.75 0.39
05:15–06:50 — nothing worth pointing at — 1.58

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 36 unknown 21:35–05:15 (marginal) 89.5° at 03:20 38.6° 1.42
M42 Great Orion Nebula 6 unknown 04:30–05:15 (marginal) 42.9° at 08:10 84.8° 0.75
M45 Seven Sisters 28 unknown 01:15–05:15 (marginal) 72.5° at 06:20 58.5° 1.83
NGC 7000 North America Nebula 63 unknown 21:35–22:10 (good) 87.2° at 23:35 56.2° 1.42
V1057 Cyg 63 unknown 21:35–22:10 (good) 87.3° at 23:35 56.2° 1.42
M33 Triangulum Pinwheel 25 unknown 22:50–05:15 (marginal) 79.1° at 04:10 35.0° 1.42
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2031-09-02"

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"}.