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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 Friday, 09 September 2039 · astronomical night 21:17 → 05:19 (8.04 h) · Moon 56% (waning gibbous) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 20:15–20:45: quality 0.1M31 20:45–21:05: quality 0.3M31 21:05–21:20: quality 0.4M31 21:20–22:05: quality 0.8M31 22:05–23:25: quality 0.9M31 23:25–01:35: quality 0.8M31 01:35–05:20: quality 0.7M31 05:20–05:55: quality 0.3M31 05:55–06:30: quality 0.1observe M31 23:55–01:30observe M31 05:20–05:55M42M42 03:55–04:00: quality 0.2M42 04:00–04:25: quality 0.3M42 04:25–04:55: quality 0.4M42 04:55–05:20: quality 0.5M42 05:20–05:55: quality 0.2M42 05:55–06:30: quality 0.1observe M42 04:40–05:20M45M45 00:20–00:30: quality 0.3M45 00:30–00:50: quality 0.4M45 00:50–01:10: quality 0.5M45 01:10–05:20: quality 0.6M45 05:20–05:55: quality 0.3M45 05:55–06:30: quality 0.1observe M45 03:05–04:40NGC 7000NGC 7000 20:10–20:25: quality 0.1NGC 7000 20:25–20:45: quality 0.2NGC 7000 20:45–21:20: quality 0.5NGC 7000 21:20–23:25: quality 1.0NGC 7000 23:25–01:55: quality 0.9NGC 7000 01:55–03:15: quality 0.8NGC 7000 03:15–04:50: quality 0.7NGC 7000 04:50–05:15: quality 0.6NGC 7000 05:15–05:20: quality 0.5NGC 7000 05:20–05:25: quality 0.3NGC 7000 05:25–05:55: quality 0.2NGC 7000 05:55–06:00: quality 0.1observe NGC 7000 20:45–22:20V1057 CygV1057 Cyg 20:10–20:25: quality 0.1V1057 Cyg 20:25–20:45: quality 0.2V1057 Cyg 20:45–21:20: quality 0.5V1057 Cyg 21:20–23:25: quality 1.0V1057 Cyg 23:25–01:55: quality 0.9V1057 Cyg 01:55–03:15: quality 0.8V1057 Cyg 03:15–04:50: quality 0.7V1057 Cyg 04:50–05:15: quality 0.6V1057 Cyg 05:15–05:20: quality 0.5V1057 Cyg 05:20–05:25: quality 0.3V1057 Cyg 05:25–05:55: quality 0.2V1057 Cyg 05:55–06:00: quality 0.1observe V1057 Cyg 22:20–23:55M33M33 21:45–21:50: quality 0.4M33 21:50–22:05: quality 0.5M33 22:05–22:20: quality 0.6M33 22:20–22:35: quality 0.7M33 22:35–23:25: quality 0.8M33 23:25–03:50: quality 0.7M33 03:50–05:20: quality 0.6M33 05:20–05:55: quality 0.3M33 05:55–06:30: quality 0.1observe M33 01:30–03:05scheduleNGC 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
19:40–20:45 — nothing worth pointing at — 1.08
20:45–22:20 NGC 7000 1.58 0.82
22:20–23:55 V1057 Cyg 1.58 0.97
23:55–01:30 M31 1.58 0.78
01:30–03:05 M33 1.58 0.7
03:05–04:40 M45 1.58 0.6
04:40–05:20 M42 0.67 0.45
05:20–05:55 M31 0.58 0.33
05:55–07:00 — nothing worth pointing at — 1.08

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 94 unknown 21:20–05:20 (good) 89.8° at 02:50 52.3° 2.17
M42 Great Orion Nebula 9 unknown 04:10–05:20 (marginal) 42.9° at 07:40 30.6° 0.67
M45 Seven Sisters 46 unknown 03:30–04:15 (good) 72.5° at 05:55 11.4° 1.58
NGC 7000 North America Nebula 100 unknown 21:20–05:05 (good) 87.2° at 23:05 90.9° 1.58
V1057 Cyg 100 unknown 21:20–05:05 (good) 87.3° at 23:05 90.9° 1.58
M33 Triangulum Pinwheel 85 unknown 22:15–05:20 (good) 79.2° at 03:40 41.3° 1.58
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2039-09-09"

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"}.