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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, 20 September 2045 · astronomical night 20:54 → 05:34 (8.65 h) · Moon 76% (waxing gibbous) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 19:50–20:25: quality 0.1M31 20:25–20:55: quality 0.3M31 20:55–22:35: quality 0.7M31 22:35–01:50: quality 0.8M31 01:50–02:05: quality 0.9M31 02:05–05:30: quality 1.0M31 05:30–05:35: quality 0.9M31 05:35–06:10: quality 0.5M31 06:10–06:40: quality 0.1observe M31 22:05–23:45M42M42 03:10–03:20: quality 0.4M42 03:20–03:35: quality 0.5M42 03:35–03:50: quality 0.6M42 03:50–04:10: quality 0.7M42 04:10–05:20: quality 0.8M42 05:20–05:35: quality 0.9M42 05:35–06:10: quality 0.4M42 06:10–06:40: quality 0.1observe M42 04:45–06:10M45M45 23:35–23:50: quality 0.4M45 23:50–00:00: quality 0.5M45 00:00–00:15: quality 0.6M45 00:15–00:40: quality 0.7M45 00:40–01:55: quality 0.8M45 01:55–02:30: quality 0.9M45 02:30–05:35: quality 1.0M45 05:35–06:10: quality 0.5M45 06:10–06:40: quality 0.2observe M45 01:25–03:05NGC 7000NGC 7000 19:50–20:25: quality 0.1NGC 7000 20:25–20:55: quality 0.4NGC 7000 20:55–00:30: quality 0.7NGC 7000 00:30–01:50: quality 0.8NGC 7000 01:50–02:05: quality 0.7NGC 7000 02:05–03:20: quality 0.9NGC 7000 03:20–04:15: quality 0.8NGC 7000 04:15–04:35: quality 0.7NGC 7000 04:35–04:50: quality 0.6NGC 7000 04:50–05:05: quality 0.5NGC 7000 05:05–05:15: quality 0.4observe NGC 7000 20:25–22:05V1057 CygV1057 Cyg 19:50–20:25: quality 0.1V1057 Cyg 20:25–20:55: quality 0.4V1057 Cyg 20:55–00:30: quality 0.7V1057 Cyg 00:30–01:50: quality 0.8V1057 Cyg 01:50–02:05: quality 0.7V1057 Cyg 02:05–03:20: quality 0.9V1057 Cyg 03:20–04:15: quality 0.8V1057 Cyg 04:15–04:35: quality 0.7V1057 Cyg 04:35–04:50: quality 0.6V1057 Cyg 04:50–05:05: quality 0.5V1057 Cyg 05:05–05:15: quality 0.4observe V1057 Cyg 03:05–04:45M33M33 21:00–21:05: quality 0.3M33 21:05–21:20: quality 0.4M33 21:20–21:40: quality 0.5M33 21:40–21:55: quality 0.6M33 21:55–23:30: quality 0.7M33 23:30–01:15: quality 0.8M33 01:15–02:05: quality 0.9M33 02:05–05:35: quality 1.0M33 05:35–06:10: quality 0.5M33 06:10–06:40: quality 0.1observe M33 23:45–01:25scheduleNGC 7000M31M33M45V1057 CygM4220:0022:0000:0002:0004:0006:00

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
19:20–20:25 — nothing worth pointing at — 1.08
20:25–22:05 NGC 7000 1.67 0.6
22:05–23:45 M31 1.67 0.77
23:45–01:25 M33 1.67 0.82
01:25–03:05 M45 1.67 0.91
03:05–04:45 V1057 Cyg 1.67 0.78
04:45–06:10 M42 1.42 0.68
06:10–07:10 — nothing worth pointing at — 1.0

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 100 unknown 20:55–05:35 (good) 89.8° at 02:05 89.2° 1.67
M42 Great Orion Nebula 45 unknown 03:45–05:35 (good) 42.9° at 06:55 133.1° 1.42
M45 Seven Sisters 100 unknown 00:10–05:35 (good) 72.6° at 05:10 119.7° 1.67
NGC 7000 North America Nebula 93 unknown 20:55–04:40 (good) 87.2° at 22:20 67.3° 1.67
V1057 Cyg 93 unknown 20:55–04:40 (good) 87.2° at 22:20 67.2° 1.67
M33 Triangulum Pinwheel 100 unknown 21:50–05:35 (good) 79.2° at 02:55 93.6° 1.67
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2045-09-20"

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"}.