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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 Sunday, 20 September 2043 · astronomical night 20:55 → 05:33 (8.63 h) · Moon 95% (waning gibbous) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 19:55–20:25: quality 0.1M31 20:25–21:00: quality 0.2M31 21:00–21:35: quality 0.5M31 21:35–00:30: quality 0.4M31 00:30–05:35: quality 0.3M31 05:35–06:10: quality 0.2M31 06:10–06:40: quality 0.1observe M31 23:35–01:10M42M42 03:15–03:25: quality 0.2M42 03:25–03:55: quality 0.3M42 03:55–04:55: quality 0.4M42 04:55–05:35: quality 0.5M42 05:35–06:00: quality 0.2M42 06:00–06:10: quality 0.3M42 06:10–06:40: quality 0.1observe M42 04:00–05:35M45M45 23:35–00:10: quality 0.2M45 00:10–04:05: quality 0.3M45 04:05–05:35: quality 0.4M45 05:35–06:10: quality 0.2M45 06:10–06:40: quality 0.1observe M45 01:55–03:30NGC 7000NGC 7000 19:55–20:05: quality 0.2NGC 7000 20:05–20:25: quality 0.1NGC 7000 20:25–20:50: quality 0.4NGC 7000 20:50–21:00: quality 0.3NGC 7000 21:00–21:50: quality 0.7NGC 7000 21:50–00:20: quality 0.6NGC 7000 00:20–02:55: quality 0.5NGC 7000 02:55–04:35: quality 0.4NGC 7000 04:35–05:10: quality 0.3NGC 7000 05:10–05:20: quality 0.2observe NGC 7000 20:25–22:00observe NGC 7000 03:30–04:00V1057 CygV1057 Cyg 19:55–20:05: quality 0.2V1057 Cyg 20:05–20:25: quality 0.1V1057 Cyg 20:25–20:50: quality 0.4V1057 Cyg 20:50–21:00: quality 0.3V1057 Cyg 21:00–21:50: quality 0.7V1057 Cyg 21:50–00:20: quality 0.6V1057 Cyg 00:20–02:55: quality 0.5V1057 Cyg 02:55–04:35: quality 0.4V1057 Cyg 04:35–05:05: quality 0.3V1057 Cyg 05:05–05:20: quality 0.2observe V1057 Cyg 22:00–23:35M33M33 21:00–21:10: quality 0.2M33 21:10–21:45: quality 0.3M33 21:45–23:45: quality 0.4M33 23:45–05:35: quality 0.3M33 05:35–06:10: quality 0.2M33 06:10–06:40: quality 0.1observe M33 01:10–01:55scheduleNGC 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
19:20–20:25 — nothing worth pointing at — 1.08
20:25–22:00 NGC 7000 1.58 0.55
22:00–23:35 V1057 Cyg 1.58 0.61
23:35–01:10 M31 1.58 0.36
01:10–01:55 M33 0.75 0.31
01:55–03:30 M45 1.58 0.33
03:30–04:00 NGC 7000 0.5 0.43
04:00–05:35 M42 1.58 0.44
05:35–07:10 — nothing worth pointing at — 1.58

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 39 unknown 21:00–05:35 (marginal) 89.5° at 02:05 31.7° 1.58
M42 Great Orion Nebula 13 unknown 03:40–05:35 (marginal) 42.9° at 07:00 65.4° 1.58
M45 Seven Sisters 21 unknown 00:30–05:35 (marginal) 72.6° at 05:10 37.2° 1.58
NGC 7000 North America Nebula 69 unknown 21:00–23:00 (good) 87.2° at 22:25 65.0° 2.08
V1057 Cyg 69 unknown 21:00–23:00 (good) 87.2° at 22:25 65.0° 1.58
M33 Triangulum Pinwheel 28 unknown 21:25–01:55 (marginal) 79.2° at 03:00 20.2° 0.75
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2043-09-20"

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"}.