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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, 30 September 2031 · astronomical night 20:37 → 05:44 (9.12 h) · Moon 100% (full moon) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 19:35–20:10: quality 0.1M31 20:10–20:40: quality 0.2M31 20:40–23:05: quality 0.4M31 23:05–03:30: quality 0.3M31 03:30–05:45: quality 0.4M31 05:45–06:20: quality 0.2M31 06:20–06:50: quality 0.1observe M31 23:40–01:25M42M42 02:35–02:40: quality 0.2M42 02:40–03:05: quality 0.3M42 03:05–03:30: quality 0.4M42 03:30–04:45: quality 0.5M42 04:45–05:45: quality 0.6M42 05:45–06:20: quality 0.3M42 06:20–06:50: quality 0.1observe M42 03:10–04:55observe M42 05:45–06:20M45M45 23:00–23:20: quality 0.2M45 23:20–00:35: quality 0.3M45 00:35–03:40: quality 0.4M45 03:40–05:45: quality 0.5M45 05:45–06:20: quality 0.3M45 06:20–06:50: quality 0.1observe M45 01:25–03:10NGC 7000NGC 7000 19:35–20:10: quality 0.1NGC 7000 20:10–20:40: quality 0.3NGC 7000 20:40–21:40: quality 0.6NGC 7000 21:40–00:55: quality 0.5NGC 7000 00:55–03:50: quality 0.4NGC 7000 03:50–04:25: quality 0.3NGC 7000 04:25–04:40: quality 0.2observe NGC 7000 20:10–21:55V1057 CygV1057 Cyg 19:35–20:10: quality 0.1V1057 Cyg 20:10–20:40: quality 0.3V1057 Cyg 20:40–21:40: quality 0.6V1057 Cyg 21:40–00:55: quality 0.5V1057 Cyg 00:55–03:50: quality 0.4V1057 Cyg 03:50–04:25: quality 0.3V1057 Cyg 04:25–04:40: quality 0.2observe V1057 Cyg 21:55–23:40M33M33 20:25–20:40: quality 0.1M33 20:40–20:45: quality 0.2M33 20:45–04:10: quality 0.3M33 04:10–05:45: quality 0.4M33 05:45–06:20: quality 0.2M33 06:20–06:50: quality 0.1observe M33 04:55–05:45scheduleNGC 7000V1057 CygM31M45M42M3320:0022:0000:0002:0004:0006:00

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
19:05–20:10 — nothing worth pointing at — 1.08
20:10–21:55 NGC 7000 1.75 0.49
21:55–23:40 V1057 Cyg 1.75 0.51
23:40–01:25 M31 1.75 0.31
01:25–03:10 M45 1.75 0.4
03:10–04:55 M42 1.75 0.5
04:55–05:45 M33 0.83 0.4
05:45–06:20 M42 0.58 0.31
06:20–07:20 — nothing worth pointing at — 1.0

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 37 unknown 20:40–05:45 (marginal) 89.5° at 01:30 34.7° 1.75
M42 Great Orion Nebula 26 unknown 02:50–06:20 (marginal) 42.9° at 06:20 77.4° 2.33
M45 Seven Sisters 40 unknown 23:40–05:45 (marginal) 72.5° at 04:30 50.4° 1.75
NGC 7000 North America Nebula 57 unknown 20:10–04:05 (marginal) 87.2° at 21:45 59.0° 1.75
V1057 Cyg 57 unknown 20:10–04:05 (marginal) 87.3° at 21:45 59.0° 1.75
M33 Triangulum Pinwheel 31 unknown 02:55–05:45 (marginal) 79.1° at 02:20 28.4° 0.83
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2031-09-30"

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"}.