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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 Saturday, 16 September 2028 · astronomical night 21:02 → 05:29 (8.45 h) · Moon 5% (waning crescent) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 20:00–20:30: quality 0.1M31 20:30–21:05: quality 0.4M31 21:05–21:35: quality 0.8M31 21:35–23:00: quality 0.9M31 23:00–05:30: quality 1.0M31 05:30–06:05: quality 0.5M31 06:05–06:40: quality 0.1observe M31 23:50–01:30M42M42 03:25–03:35: quality 0.4M42 03:35–03:50: quality 0.5M42 03:50–04:05: quality 0.6M42 04:05–04:20: quality 0.7M42 04:20–05:30: quality 0.8M42 05:30–06:05: quality 0.4M42 06:05–06:40: quality 0.1observe M42 04:50–06:05M45M45 23:50–23:55: quality 0.4M45 23:55–00:10: quality 0.5M45 00:10–00:25: quality 0.6M45 00:25–00:35: quality 0.7M45 00:35–01:25: quality 0.8M45 01:25–02:45: quality 0.9M45 02:45–05:30: quality 1.0M45 05:30–06:05: quality 0.5M45 06:05–06:40: quality 0.1observe M45 03:10–04:50NGC 7000NGC 7000 20:00–20:30: quality 0.2NGC 7000 20:30–21:05: quality 0.5NGC 7000 21:05–02:05: quality 1.0NGC 7000 02:05–03:35: quality 0.9NGC 7000 03:35–04:30: quality 0.8NGC 7000 04:30–04:45: quality 0.7NGC 7000 04:45–05:05: quality 0.6NGC 7000 05:05–05:20: quality 0.5NGC 7000 05:20–05:30: quality 0.4observe NGC 7000 20:30–22:10V1057 CygV1057 Cyg 20:00–20:30: quality 0.2V1057 Cyg 20:30–21:05: quality 0.5V1057 Cyg 21:05–02:05: quality 1.0V1057 Cyg 02:05–03:35: quality 0.9V1057 Cyg 03:35–04:30: quality 0.8V1057 Cyg 04:30–04:45: quality 0.7V1057 Cyg 04:45–05:05: quality 0.6V1057 Cyg 05:05–05:20: quality 0.5V1057 Cyg 05:20–05:30: quality 0.4observe V1057 Cyg 22:10–23:50M33M33 21:15–21:20: quality 0.4M33 21:20–21:35: quality 0.5M33 21:35–21:50: quality 0.6M33 21:50–22:05: quality 0.7M33 22:05–22:55: quality 0.8M33 22:55–00:15: quality 0.9M33 00:15–05:30: quality 1.0M33 05:30–06:05: quality 0.5M33 06:05–06:40: quality 0.1observe M33 01:30–03:10scheduleNGC 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
19:25–20:30 — nothing worth pointing at — 1.08
20:30–22:10 NGC 7000 1.67 0.82
22:10–23:50 V1057 Cyg 1.67 1.0
23:50–01:30 M31 1.67 1.0
01:30–03:10 M33 1.67 1.0
03:10–04:50 M45 1.67 1.0
04:50–06:05 M42 1.25 0.64
06:05–07:05 — nothing worth pointing at — 1.0

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 100 unknown 21:05–05:30 (good) 89.7° at 02:20 116.9° 1.67
M42 Great Orion Nebula 38 unknown 03:55–05:30 (good) 42.9° at 07:10 67.0° 1.25
M45 Seven Sisters 100 unknown 00:15–05:30 (good) 72.5° at 05:25 88.8° 1.67
NGC 7000 North America Nebula 100 unknown 21:05–04:55 (good) 87.2° at 22:35 124.9° 1.67
V1057 Cyg 100 unknown 21:05–04:55 (good) 87.3° at 22:35 124.9° 1.67
M33 Triangulum Pinwheel 100 unknown 21:45–05:30 (good) 79.1° at 03:10 114.7° 1.67
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2028-09-16"

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"}.