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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 Monday, 01 September 2031 · astronomical night 21:33 → 05:09 (7.6 h) · Moon 99% (full moon) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 21:00–21:05: quality 0.1M31 21:05–21:35: quality 0.2M31 21:35–03:40: quality 0.4M31 03:40–05:10: quality 0.5M31 05:10–05:45: quality 0.3M31 05:45–06:20: quality 0.1observe M31 00:15–01:40M42M42 04:30–04:40: quality 0.3M42 04:40–04:55: quality 0.4M42 04:55–05:10: quality 0.5M42 05:10–05:45: quality 0.3M42 05:45–06:20: quality 0.1observe M42 04:30–05:10observe M42 05:40–05:45M45M45 00:50–00:55: quality 0.2M45 00:55–01:20: quality 0.3M45 01:20–01:45: quality 0.4M45 01:45–03:30: quality 0.5M45 03:30–05:10: quality 0.6M45 05:10–05:45: quality 0.3M45 05:45–06:20: quality 0.1observe M45 01:40–03:05observe M45 05:10–05:40NGC 7000NGC 7000 20:25–21:00: quality 0.1NGC 7000 21:00–21:35: quality 0.3NGC 7000 21:35–22:10: quality 0.6NGC 7000 22:10–02:50: quality 0.5NGC 7000 02:50–05:10: quality 0.4NGC 7000 05:10–05:45: quality 0.2NGC 7000 05:45–06:00: quality 0.1observe NGC 7000 21:00–21:10observe NGC 7000 21:35–22:50V1057 CygV1057 Cyg 20:25–21:00: quality 0.1V1057 Cyg 21:00–21:35: quality 0.3V1057 Cyg 21:35–22:10: quality 0.6V1057 Cyg 22:10–02:50: quality 0.5V1057 Cyg 02:50–05:10: quality 0.4V1057 Cyg 05:10–05:45: quality 0.2V1057 Cyg 05:45–06:00: quality 0.1observe V1057 Cyg 22:50–00:15M33M33 22:15–22:30: quality 0.2M33 22:30–23:05: quality 0.3M33 23:05–03:40: quality 0.4M33 03:40–05:10: quality 0.5M33 05:10–05:45: quality 0.3M33 05:45–06:20: quality 0.1observe M33 03:05–04:30scheduleNGC 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
19:50–21:00 — nothing worth pointing at — 1.17
21:00–21:10 NGC 7000 0.17 0.3
21:10–21:35 — nothing worth pointing at — 0.42
21:35–22:50 NGC 7000 1.25 0.55
22:50–00:15 V1057 Cyg 1.42 0.49
00:15–01:40 M31 1.42 0.43
01:40–03:05 M45 1.42 0.49
03:05–04:30 M33 1.42 0.45
04:30–05:10 M42 0.67 0.41
05:10–05:40 M45 0.5 0.32
05:40–05:45 M42 0.08 0.32
05:45–06:50 — nothing worth pointing at — 1.08

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 46 unknown 21:35–05:10 (marginal) 89.6° at 03:20 47.9° 1.42
M42 Great Orion Nebula 6 unknown 04:30–05:10 (marginal) 42.9° at 08:15 97.7° 0.75
M45 Seven Sisters 39 unknown 04:15–05:10 (good) 72.5° at 06:25 72.8° 1.92
NGC 7000 North America Nebula 57 unknown 21:35–05:10 (marginal) 87.2° at 23:40 53.2° 1.42
V1057 Cyg 57 unknown 21:35–05:10 (marginal) 87.3° at 23:40 53.2° 1.42
M33 Triangulum Pinwheel 38 unknown 22:45–05:10 (marginal) 79.1° at 04:15 47.7° 1.42
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2031-09-01"

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"}.