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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 Sunday, 01 September 2030 · astronomical night 21:32 → 05:09 (7.61 h) · Moon 18% (waxing crescent) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 20:45–21:00: quality 0.1M31 21:00–21:35: quality 0.3M31 21:35–21:40: quality 0.7M31 21:40–22:35: quality 0.8M31 22:35–00:00: quality 0.9M31 00:00–05:10: quality 1.0M31 05:10–05:50: quality 0.5M31 05:50–06:05: quality 0.2M31 06:05–06:20: quality 0.1observe M31 00:00–01:30M42M42 04:25–04:35: quality 0.4M42 04:35–04:50: quality 0.5M42 04:50–05:05: quality 0.6M42 05:05–05:10: quality 0.7M42 05:10–05:15: quality 0.3M42 05:15–05:50: quality 0.4M42 05:50–06:20: quality 0.1observe M42 04:30–05:50M45M45 00:50–01:00: quality 0.4M45 01:00–01:10: quality 0.5M45 01:10–01:25: quality 0.6M45 01:25–01:40: quality 0.7M45 01:40–02:25: quality 0.8M45 02:25–03:45: quality 0.9M45 03:45–05:10: quality 1.0M45 05:10–05:50: quality 0.5M45 05:50–06:20: quality 0.2observe M45 03:00–04:30NGC 7000NGC 7000 20:25–21:00: quality 0.1NGC 7000 21:00–21:35: quality 0.5NGC 7000 21:35–03:05: quality 1.0NGC 7000 03:05–04:35: quality 0.9NGC 7000 04:35–05:10: quality 0.8NGC 7000 05:10–05:40: quality 0.4NGC 7000 05:40–05:50: quality 0.3NGC 7000 05:50–06:20: quality 0.1observe NGC 7000 21:00–22:30V1057 CygV1057 Cyg 20:25–21:00: quality 0.1V1057 Cyg 21:00–21:35: quality 0.5V1057 Cyg 21:35–03:05: quality 1.0V1057 Cyg 03:05–04:35: quality 0.9V1057 Cyg 04:35–05:10: quality 0.8V1057 Cyg 05:10–05:40: quality 0.4V1057 Cyg 05:40–05:50: quality 0.3V1057 Cyg 05:50–06:20: quality 0.1observe V1057 Cyg 22:30–00:00M33M33 22:15–22:25: quality 0.4M33 22:25–22:35: quality 0.5M33 22:35–22:50: quality 0.6M33 22:50–23:05: quality 0.7M33 23:05–23:55: quality 0.8M33 23:55–01:15: quality 0.9M33 01:15–05:10: quality 1.0M33 05:10–05:50: quality 0.5M33 05:50–06:20: quality 0.2observe M33 01:30–03:00scheduleNGC 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
21:00–22:30 NGC 7000 1.5 0.8
22:30–00:00 V1057 Cyg 1.5 1.0
00:00–01:30 M31 1.5 0.99
01:30–03:00 M33 1.5 1.0
03:00–04:30 M45 1.5 0.95
04:30–05:50 M42 1.33 0.47
05:50–06:50 — nothing worth pointing at — 1.0

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 100 unknown 21:35–05:10 (good) 89.7° at 03:20 149.9° 1.5
M42 Great Orion Nebula 12 unknown 05:00–05:10 (good) 42.9° at 08:10 120.3° 1.33
M45 Seven Sisters 100 unknown 01:20–05:10 (good) 72.5° at 06:25 150.7° 1.5
NGC 7000 North America Nebula 100 unknown 21:35–05:10 (good) 87.2° at 23:35 112.8° 1.5
V1057 Cyg 100 unknown 21:35–05:10 (good) 87.3° at 23:35 112.8° 1.5
M33 Triangulum Pinwheel 100 unknown 22:45–05:10 (good) 79.1° at 04:10 163.7° 1.5
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2030-09-01"

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"}.