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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, 22 September 2040 · astronomical night 20:50 → 05:36 (8.77 h) · Moon 94% (waning gibbous) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 19:50–20:20: quality 0.1M31 20:20–20:35: quality 0.4M31 20:35–20:55: quality 0.3M31 20:55–23:35: quality 0.5M31 23:35–02:20: quality 0.4M31 02:20–04:05: quality 0.3M31 04:05–05:40: quality 0.4M31 05:40–06:10: quality 0.2M31 06:10–06:45: quality 0.1observe M31 23:30–01:05M42M42 03:05–03:20: quality 0.2M42 03:20–03:55: quality 0.3M42 03:55–05:40: quality 0.4M42 05:40–06:10: quality 0.2M42 06:10–06:45: quality 0.1observe M42 04:15–05:40M45M45 23:25–23:55: quality 0.2M45 23:55–05:10: quality 0.3M45 05:10–05:40: quality 0.4M45 05:40–06:10: quality 0.2M45 06:10–06:45: quality 0.1observe M45 02:40–04:15NGC 7000NGC 7000 19:50–20:20: quality 0.2NGC 7000 20:20–20:35: quality 0.5NGC 7000 20:35–20:55: quality 0.4NGC 7000 20:55–23:10: quality 0.7NGC 7000 23:10–01:40: quality 0.6NGC 7000 01:40–04:00: quality 0.5NGC 7000 04:00–04:30: quality 0.4NGC 7000 04:30–05:00: quality 0.3NGC 7000 05:00–05:05: quality 0.2observe NGC 7000 20:20–21:55V1057 CygV1057 Cyg 19:50–20:20: quality 0.2V1057 Cyg 20:20–20:35: quality 0.5V1057 Cyg 20:35–20:55: quality 0.4V1057 Cyg 20:55–23:10: quality 0.7V1057 Cyg 23:10–01:40: quality 0.6V1057 Cyg 01:40–04:00: quality 0.5V1057 Cyg 04:00–04:30: quality 0.4V1057 Cyg 04:30–05:00: quality 0.3V1057 Cyg 05:00–05:05: quality 0.2observe V1057 Cyg 21:55–23:30M33M33 20:50–20:55: quality 0.1M33 20:55–21:25: quality 0.3M33 21:25–01:05: quality 0.4M33 01:05–05:40: quality 0.3M33 05:40–06:10: quality 0.2M33 06:10–06:45: quality 0.1observe M33 01:05–02:40scheduleNGC 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
19:15–20:20 — nothing worth pointing at — 1.08
20:20–21:55 NGC 7000 1.58 0.62
21:55–23:30 V1057 Cyg 1.58 0.67
23:30–01:05 M31 1.58 0.42
01:05–02:40 M33 1.58 0.33
02:40–04:15 M45 1.58 0.32
04:15–05:40 M42 1.42 0.42
05:40–07:10 — nothing worth pointing at — 1.5

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 50 unknown 20:55–05:40 (marginal) 89.7° at 01:55 35.7° 1.58
M42 Great Orion Nebula 12 unknown 03:40–05:40 (marginal) 42.9° at 06:50 57.6° 1.42
M45 Seven Sisters 19 unknown 00:15–05:40 (marginal) 72.5° at 05:00 31.3° 1.58
NGC 7000 North America Nebula 75 unknown 20:55–00:40 (good) 87.2° at 22:10 71.7° 1.58
V1057 Cyg 75 unknown 20:55–00:40 (good) 87.2° at 22:10 71.7° 1.58
M33 Triangulum Pinwheel 34 unknown 21:10–05:40 (marginal) 79.2° at 02:45 22.1° 1.58
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2040-09-22"

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"}.