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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 Tuesday, 18 September 2040 · astronomical night 20:58 → 05:31 (8.56 h) · Moon 95% (waxing gibbous) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 19:55–20:25: quality 0.1M31 20:25–20:30: quality 0.2M31 20:30–21:00: quality 0.3M31 21:00–21:50: quality 0.5M31 21:50–02:50: quality 0.6M31 02:50–05:00: quality 0.7M31 05:00–05:35: quality 1.0M31 05:35–06:10: quality 0.5M31 06:10–06:40: quality 0.1observe M31 23:45–01:25M42M42 03:20–03:40: quality 0.4M42 03:40–03:55: quality 0.5M42 03:55–04:15: quality 0.6M42 04:15–05:00: quality 0.7M42 05:00–05:25: quality 0.8M42 05:25–05:35: quality 0.9M42 05:35–06:10: quality 0.4M42 06:10–06:40: quality 0.1observe M42 04:45–06:10M45M45 23:40–23:55: quality 0.3M45 23:55–00:15: quality 0.4M45 00:15–00:30: quality 0.5M45 00:30–01:45: quality 0.6M45 01:45–03:05: quality 0.7M45 03:05–05:00: quality 0.8M45 05:00–05:35: quality 1.0M45 05:35–06:10: quality 0.5M45 06:10–06:40: quality 0.2observe M45 01:25–03:05NGC 7000NGC 7000 19:55–20:25: quality 0.1NGC 7000 20:25–21:00: quality 0.3NGC 7000 21:00–04:15: quality 0.6NGC 7000 04:15–04:45: quality 0.5NGC 7000 04:45–05:00: quality 0.4NGC 7000 05:00–05:15: quality 0.5NGC 7000 05:15–05:25: quality 0.4observe NGC 7000 20:25–22:05V1057 CygV1057 Cyg 19:55–20:25: quality 0.1V1057 Cyg 20:25–21:00: quality 0.3V1057 Cyg 21:00–04:15: quality 0.6V1057 Cyg 04:15–04:45: quality 0.5V1057 Cyg 04:45–05:00: quality 0.4V1057 Cyg 05:00–05:15: quality 0.5V1057 Cyg 05:15–05:25: quality 0.4observe V1057 Cyg 22:05–23:45M33M33 21:05–21:30: quality 0.3M33 21:30–21:55: quality 0.4M33 21:55–23:40: quality 0.5M33 23:40–02:50: quality 0.6M33 02:50–05:00: quality 0.7M33 05:00–05:35: quality 1.0M33 05:35–06:10: quality 0.5M33 06:10–06:40: 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 0.52
22:05–23:45 V1057 Cyg 1.67 0.6
23:45–01:25 M31 1.67 0.61
01:25–03:05 M45 1.67 0.69
03:05–04:45 M33 1.67 0.69
04:45–06:10 M42 1.42 0.65
06:10–07:10 — nothing worth pointing at — 1.0

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 99 unknown 23:30–05:35 (good) 89.6° at 02:10 65.3° 1.67
M42 Great Orion Nebula 38 unknown 04:05–05:35 (good) 42.9° at 07:05 105.8° 1.42
M45 Seven Sisters 100 unknown 01:00–05:35 (good) 72.5° at 05:15 88.3° 1.67
NGC 7000 North America Nebula 64 unknown 21:00–22:30 (good) 87.2° at 22:30 62.8° 1.67
V1057 Cyg 64 unknown 21:00–22:30 (good) 87.3° at 22:30 62.8° 1.67
M33 Triangulum Pinwheel 100 unknown 00:40–05:35 (good) 79.2° at 03:05 65.1° 1.67
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2040-09-18"

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"}.