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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, 27 September 2028 · astronomical night 20:41 → 05:42 (9.01 h) · Moon 73% (waxing gibbous) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 19:40–20:10: quality 0.1M31 20:10–20:45: quality 0.3M31 20:45–22:20: quality 0.7M31 22:20–01:50: quality 0.8M31 01:50–02:00: quality 0.9M31 02:00–05:00: quality 1.0M31 05:00–05:45: quality 0.9M31 05:45–06:20: quality 0.4M31 06:20–06:50: quality 0.1observe M31 21:55–23:40M42M42 02:45–02:50: quality 0.4M42 02:50–03:05: quality 0.5M42 03:05–03:20: quality 0.6M42 03:20–03:40: quality 0.7M42 03:40–04:50: quality 0.8M42 04:50–05:45: quality 0.9M42 05:45–06:20: quality 0.4M42 06:20–06:50: quality 0.1observe M42 04:35–06:20M45M45 23:05–23:20: quality 0.4M45 23:20–23:35: quality 0.5M45 23:35–23:50: quality 0.6M45 23:50–00:15: quality 0.7M45 00:15–01:35: quality 0.8M45 01:35–02:00: quality 0.9M45 02:00–05:45: quality 1.0M45 05:45–06:20: quality 0.5M45 06:20–06:40: quality 0.2M45 06:40–06:50: quality 0.1observe M45 01:25–03:10NGC 7000NGC 7000 19:40–20:10: quality 0.1NGC 7000 20:10–20:40: quality 0.4NGC 7000 20:40–20:45: quality 0.3NGC 7000 20:45–00:30: quality 0.7NGC 7000 00:30–00:50: quality 0.8NGC 7000 00:50–02:00: quality 0.7NGC 7000 02:00–02:50: quality 0.9NGC 7000 02:50–03:45: quality 0.8NGC 7000 03:45–04:05: quality 0.7NGC 7000 04:05–04:20: quality 0.6NGC 7000 04:20–04:40: quality 0.5NGC 7000 04:40–04:50: quality 0.4observe NGC 7000 03:10–04:35V1057 CygV1057 Cyg 19:40–20:10: quality 0.1V1057 Cyg 20:10–20:35: quality 0.4V1057 Cyg 20:35–20:45: quality 0.3V1057 Cyg 20:45–00:35: quality 0.7V1057 Cyg 00:35–00:50: quality 0.8V1057 Cyg 00:50–02:00: quality 0.7V1057 Cyg 02:00–02:50: quality 0.9V1057 Cyg 02:50–03:45: quality 0.8V1057 Cyg 03:45–04:05: quality 0.7V1057 Cyg 04:05–04:20: quality 0.6V1057 Cyg 04:20–04:40: quality 0.5V1057 Cyg 04:40–04:45: quality 0.4observe V1057 Cyg 20:10–21:55M33M33 20:30–20:45: quality 0.2M33 20:45–20:55: quality 0.4M33 20:55–21:10: quality 0.5M33 21:10–21:35: quality 0.6M33 21:35–23:10: quality 0.7M33 23:10–01:20: quality 0.8M33 01:20–02:00: quality 0.9M33 02:00–05:30: quality 1.0M33 05:30–05:45: quality 0.9M33 05:45–06:10: quality 0.5M33 06:10–06:20: quality 0.4M33 06:20–06:50: quality 0.1observe M33 23:40–01:25scheduleV1057 CygM31M33M45NGC 7000M4220:0022:0000:0002:0004:0006:00

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
19:05–20:10 — nothing worth pointing at — 1.08
20:10–21:55 V1057 Cyg 1.75 0.58
21:55–23:40 M31 1.75 0.78
23:40–01:25 M33 1.75 0.83
01:25–03:10 M45 1.75 0.94
03:10–04:35 NGC 7000 1.42 0.7
04:35–06:20 M42 1.75 0.72
06:20–07:20 — nothing worth pointing at — 1.0

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 100 unknown 20:45–05:45 (good) 89.6° at 01:35 85.6° 1.75
M42 Great Orion Nebula 57 unknown 03:15–05:45 (good) 42.9° at 06:30 133.4° 1.75
M45 Seven Sisters 100 unknown 23:40–05:45 (good) 72.5° at 04:40 117.2° 1.75
NGC 7000 North America Nebula 90 unknown 20:45–04:15 (good) 87.2° at 21:55 63.6° 1.42
V1057 Cyg 90 unknown 20:45–04:10 (good) 87.3° at 21:55 63.5° 1.75
M33 Triangulum Pinwheel 100 unknown 21:20–05:45 (good) 79.1° at 02:25 90.4° 1.75
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2028-09-27"

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"}.