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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 Thursday, 17 September 2037 · astronomical night 21:00 → 05:30 (8.49 h) · Moon 65% (waxing gibbous) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 19:55–20:30: quality 0.1M31 20:30–20:55: quality 0.3M31 20:55–21:05: quality 0.4M31 21:05–21:40: quality 0.7M31 21:40–23:10: quality 0.8M31 23:10–01:00: quality 0.9M31 01:00–05:35: quality 1.0M31 05:35–06:05: quality 0.5M31 06:05–06:40: quality 0.1observe M31 22:10–23:50M42M42 03:25–03:30: quality 0.4M42 03:30–03:45: quality 0.5M42 03:45–04:00: quality 0.6M42 04:00–04:20: quality 0.7M42 04:20–05:30: quality 0.8M42 05:30–05:35: quality 0.9M42 05:35–06:05: quality 0.4M42 06:05–06:40: quality 0.1observe M42 04:50–06:05M45M45 23:45–00:00: quality 0.4M45 00:00–00:10: quality 0.5M45 00:10–00:25: quality 0.6M45 00:25–00:40: quality 0.7M45 00:40–01:20: quality 0.8M45 01:20–02:45: quality 0.9M45 02:45–05:35: quality 1.0M45 05:35–06:05: quality 0.5M45 06:05–06:40: quality 0.2observe M45 03:10–04:50NGC 7000NGC 7000 19:55–20:30: quality 0.1NGC 7000 20:30–21:05: quality 0.4NGC 7000 21:05–01:00: quality 0.8NGC 7000 01:00–02:05: quality 1.0NGC 7000 02:05–03:30: quality 0.9NGC 7000 03:30–04:30: quality 0.8NGC 7000 04:30–04:45: quality 0.7NGC 7000 04:45–05:00: quality 0.6NGC 7000 05:00–05:20: quality 0.5NGC 7000 05:20–05:30: quality 0.4observe NGC 7000 20:30–22:10V1057 CygV1057 Cyg 19:55–20:30: quality 0.1V1057 Cyg 20:30–21:05: quality 0.4V1057 Cyg 21:05–01:00: quality 0.8V1057 Cyg 01:00–02:05: quality 1.0V1057 Cyg 02:05–03:30: quality 0.9V1057 Cyg 03:30–04:30: quality 0.8V1057 Cyg 04:30–04:45: quality 0.7V1057 Cyg 04:45–05:00: quality 0.6V1057 Cyg 05:00–05:20: quality 0.5V1057 Cyg 05:20–05:30: quality 0.4observe V1057 Cyg 01:30–03:10M33M33 21:10–21:25: quality 0.4M33 21:25–21:45: quality 0.5M33 21:45–22:00: quality 0.6M33 22:00–22:40: quality 0.7M33 22:40–00:00: quality 0.8M33 00:00–01:00: quality 0.9M33 01:00–05:35: quality 1.0M33 05:35–06:05: quality 0.5M33 06:05–06:40: quality 0.1observe M33 23:50–01:30scheduleNGC 7000M31M33V1057 CygM45M4220:0022:0000:0002:0004:0006:00

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
19:25–20:30 — nothing worth pointing at — 1.08
20:30–22:10 NGC 7000 1.67 0.64
22:10–23:50 M31 1.67 0.84
23:50–01:30 M33 1.67 0.92
01:30–03:10 V1057 Cyg 1.67 0.93
03:10–04:50 M45 1.67 1.0
04:50–06:05 M42 1.25 0.68
06:05–07:05 — nothing worth pointing at — 1.0

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 100 unknown 21:05–05:35 (good) 89.6° at 02:15 101.7° 1.67
M42 Great Orion Nebula 40 unknown 03:55–05:35 (good) 42.9° at 07:10 146.6° 1.25
M45 Seven Sisters 100 unknown 00:20–05:35 (good) 72.5° at 05:20 136.5° 1.67
NGC 7000 North America Nebula 100 unknown 21:05–04:55 (good) 87.2° at 22:35 71.7° 1.67
V1057 Cyg 100 unknown 21:05–04:55 (good) 87.3° at 22:35 71.6° 1.67
M33 Triangulum Pinwheel 100 unknown 21:50–05:35 (good) 79.2° at 03:10 108.7° 1.67
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2037-09-17"

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"}.