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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 Wednesday, 13 September 2028 · astronomical night 21:08 → 05:25 (8.29 h) · Moon 30% (waning crescent) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 20:05–20:35: quality 0.1M31 20:35–20:45: quality 0.3M31 20:45–21:10: quality 0.4M31 21:10–21:45: quality 0.8M31 21:45–23:10: quality 0.9M31 23:10–01:35: quality 1.0M31 01:35–05:30: quality 0.9M31 05:30–06:00: quality 0.4M31 06:00–06:35: quality 0.1observe M31 23:45–01:20M42M42 03:40–04:00: quality 0.4M42 04:00–04:20: quality 0.5M42 04:20–04:40: quality 0.6M42 04:40–05:30: quality 0.7M42 05:30–06:00: quality 0.3M42 06:00–06:35: quality 0.1observe M42 04:30–06:00M45M45 00:00–00:10: quality 0.4M45 00:10–00:20: quality 0.5M45 00:20–00:35: quality 0.6M45 00:35–00:50: quality 0.7M45 00:50–03:25: quality 0.8M45 03:25–04:10: quality 0.9M45 04:10–05:30: quality 0.8M45 05:30–06:00: quality 0.4M45 06:00–06:35: quality 0.1observe M45 02:55–04:30NGC 7000NGC 7000 20:05–20:35: quality 0.2NGC 7000 20:35–21:10: quality 0.5NGC 7000 21:10–01:45: quality 1.0NGC 7000 01:45–03:10: quality 0.9NGC 7000 03:10–04:35: quality 0.8NGC 7000 04:35–04:50: quality 0.7NGC 7000 04:50–05:10: quality 0.6NGC 7000 05:10–05:30: quality 0.5NGC 7000 05:30–05:45: quality 0.2observe NGC 7000 20:35–22:10V1057 CygV1057 Cyg 20:05–20:35: quality 0.2V1057 Cyg 20:35–21:10: quality 0.5V1057 Cyg 21:10–01:45: quality 1.0V1057 Cyg 01:45–03:10: quality 0.9V1057 Cyg 03:10–04:35: quality 0.8V1057 Cyg 04:35–04:50: quality 0.7V1057 Cyg 04:50–05:10: quality 0.6V1057 Cyg 05:10–05:30: quality 0.5V1057 Cyg 05:30–05:40: quality 0.2observe V1057 Cyg 22:10–23:45M33M33 21:25–21:35: quality 0.4M33 21:35–21:50: quality 0.5M33 21:50–22:00: quality 0.6M33 22:00–22:15: quality 0.7M33 22:15–23:05: quality 0.8M33 23:05–00:25: quality 0.9M33 00:25–01:35: quality 1.0M33 01:35–05:30: quality 0.9M33 05:30–06:00: quality 0.4M33 06:00–06:35: quality 0.1observe M33 01:20–02:55scheduleNGC 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
19:30–20:35 — nothing worth pointing at — 1.08
20:35–22:10 NGC 7000 1.58 0.82
22:10–23:45 V1057 Cyg 1.58 1.0
23:45–01:20 M31 1.58 1.0
01:20–02:55 M33 1.58 0.93
02:55–04:30 M45 1.58 0.85
04:30–06:00 M42 1.5 0.56
06:00–07:05 — nothing worth pointing at — 1.08

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 100 unknown 21:10–05:30 (good) 89.6° at 02:30 79.1° 1.58
M42 Great Orion Nebula 22 unknown 04:30–05:30 (good) 42.9° at 07:25 36.1° 1.5
M45 Seven Sisters 86 unknown 00:30–05:30 (good) 72.5° at 05:35 45.4° 1.58
NGC 7000 North America Nebula 100 unknown 21:10–05:00 (good) 87.2° at 22:50 107.7° 1.58
V1057 Cyg 100 unknown 21:10–05:00 (good) 87.3° at 22:50 107.8° 1.58
M33 Triangulum Pinwheel 100 unknown 21:55–05:30 (good) 79.1° at 03:20 72.7° 1.58
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2028-09-13"

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"}.