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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 Monday, 16 September 2030 · astronomical night 21:03 → 05:28 (8.43 h) · Moon 76% (waning gibbous) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 20:00–20:30: quality 0.1M31 20:30–20:35: quality 0.3M31 20:35–21:05: quality 0.4M31 21:05–21:35: quality 0.8M31 21:35–21:45: quality 0.9M31 21:45–01:15: quality 0.6M31 01:15–05:30: quality 0.5M31 05:30–06:05: quality 0.2M31 06:05–06:40: quality 0.1observe M31 23:30–01:00M42M42 03:30–03:45: quality 0.2M42 03:45–04:20: quality 0.3M42 04:20–05:30: quality 0.4M42 05:30–06:05: quality 0.2M42 06:05–06:40: quality 0.1observe M42 04:30–05:30M45M45 23:50–23:55: quality 0.2M45 23:55–00:25: quality 0.3M45 00:25–05:30: quality 0.4M45 05:30–06:05: quality 0.2M45 06:05–06:40: quality 0.1observe M45 02:30–04:00NGC 7000NGC 7000 20:00–20:30: quality 0.2NGC 7000 20:30–21:05: quality 0.5NGC 7000 21:05–21:45: quality 1.0NGC 7000 21:45–00:25: quality 0.8NGC 7000 00:25–02:25: quality 0.7NGC 7000 02:25–04:10: quality 0.6NGC 7000 04:10–04:45: quality 0.5NGC 7000 04:45–05:10: quality 0.4NGC 7000 05:10–05:30: quality 0.3NGC 7000 05:30–05:35: quality 0.1observe NGC 7000 20:30–22:00observe NGC 7000 04:00–04:30V1057 CygV1057 Cyg 20:00–20:30: quality 0.2V1057 Cyg 20:30–21:05: quality 0.5V1057 Cyg 21:05–21:45: quality 1.0V1057 Cyg 21:45–00:25: quality 0.8V1057 Cyg 00:25–02:25: quality 0.7V1057 Cyg 02:25–04:10: quality 0.6V1057 Cyg 04:10–04:45: quality 0.5V1057 Cyg 04:45–05:10: quality 0.4V1057 Cyg 05:10–05:30: quality 0.3V1057 Cyg 05:30–05:35: quality 0.1observe V1057 Cyg 22:00–23:30M33M33 21:15–21:25: quality 0.4M33 21:25–21:40: quality 0.5M33 21:40–21:45: quality 0.6M33 21:45–21:55: quality 0.4M33 21:55–02:50: quality 0.5M33 02:50–05:30: quality 0.4M33 05:30–06:05: quality 0.2M33 06:05–06:40: quality 0.1observe M33 01:00–02:30scheduleNGC 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
19:25–20:30 — nothing worth pointing at — 1.08
20:30–22:00 NGC 7000 1.5 0.78
22:00–23:30 V1057 Cyg 1.5 0.8
23:30–01:00 M31 1.5 0.6
01:00–02:30 M33 1.5 0.49
02:30–04:00 M45 1.5 0.43
04:00–04:30 NGC 7000 0.5 0.55
04:30–05:30 M42 1.0 0.39
05:30–07:05 — nothing worth pointing at — 1.58

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 86 unknown 21:05–00:10 (good) 89.6° at 02:20 39.3° 1.5
M42 Great Orion Nebula 8 unknown 04:05–05:30 (marginal) 42.9° at 07:15 42.0° 1.0
M45 Seven Sisters 27 unknown 00:10–05:30 (marginal) 72.5° at 05:25 7.6° 1.5
NGC 7000 North America Nebula 100 unknown 21:05–03:15 (good) 87.2° at 22:40 79.7° 2.0
V1057 Cyg 100 unknown 21:05–03:15 (good) 87.3° at 22:40 79.7° 1.5
M33 Triangulum Pinwheel 58 unknown 21:15–05:30 (marginal) 79.1° at 03:15 26.0° 1.5
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2030-09-16"

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"}.