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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 Thursday, 20 September 2040 · astronomical night 20:54 → 05:34 (8.66 h) · Moon 100% (full moon) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 19:50–20:25: quality 0.1M31 20:25–20:55: quality 0.2M31 20:55–23:30: quality 0.5M31 23:30–03:40: quality 0.4M31 03:40–05:35: quality 0.5M31 05:35–06:10: quality 0.3M31 06:10–06:45: quality 0.1observe M31 23:45–01:25M42M42 03:10–03:30: quality 0.3M42 03:30–03:55: quality 0.4M42 03:55–04:35: quality 0.5M42 04:35–05:35: quality 0.6M42 05:35–06:10: quality 0.3M42 06:10–06:45: quality 0.1observe M42 04:45–06:10M45M45 23:35–23:45: quality 0.2M45 23:45–00:15: quality 0.3M45 00:15–01:50: quality 0.4M45 01:50–04:20: quality 0.5M45 04:20–05:35: quality 0.6M45 05:35–06:10: quality 0.3M45 06:10–06:45: quality 0.1observe M45 01:25–03:05NGC 7000NGC 7000 19:50–20:25: quality 0.1NGC 7000 20:25–20:55: quality 0.3NGC 7000 20:55–21:10: quality 0.7NGC 7000 21:10–23:45: quality 0.6NGC 7000 23:45–04:10: quality 0.5NGC 7000 04:10–04:40: quality 0.4NGC 7000 04:40–05:15: quality 0.3observe NGC 7000 20:25–22:05V1057 CygV1057 Cyg 19:50–20:25: quality 0.1V1057 Cyg 20:25–20:55: quality 0.3V1057 Cyg 20:55–21:05: quality 0.7V1057 Cyg 21:05–23:45: quality 0.6V1057 Cyg 23:45–04:10: quality 0.5V1057 Cyg 04:10–04:40: quality 0.4V1057 Cyg 04:40–05:15: quality 0.3observe V1057 Cyg 22:05–23:45M33M33 21:00–21:10: quality 0.2M33 21:10–21:40: quality 0.3M33 21:40–04:30: quality 0.4M33 04:30–05:35: quality 0.5M33 05:35–05:50: quality 0.2M33 05:50–06:10: quality 0.3M33 06:10–06:45: quality 0.1observe M33 03:05–04:45scheduleNGC 7000V1057 CygM31M45M33M4220:0022:0000:0002:0004:0006:00

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 0.54
22:05–23:45 V1057 Cyg 1.67 0.58
23:45–01:25 M31 1.67 0.43
01:25–03:05 M45 1.67 0.47
03:05–04:45 M33 1.67 0.43
04:45–06:10 M42 1.42 0.47
06:10–07:10 — nothing worth pointing at — 1.0

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 50 unknown 20:55–05:35 (marginal) 89.8° at 02:05 45.3° 1.67
M42 Great Orion Nebula 22 unknown 05:25–05:35 (good) 42.9° at 06:55 80.9° 1.42
M45 Seven Sisters 46 unknown 00:00–06:10 (marginal) 72.5° at 05:10 59.2° 1.67
NGC 7000 North America Nebula 66 unknown 20:55–22:15 (good) 87.2° at 22:20 64.1° 1.67
V1057 Cyg 66 unknown 20:55–22:15 (good) 87.3° at 22:20 64.0° 1.67
M33 Triangulum Pinwheel 44 unknown 21:25–05:35 (marginal) 79.2° at 02:55 39.4° 1.67
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2040-09-20"

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"}.