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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 Wednesday, 18 September 2030 · astronomical night 20:59 → 05:31 (8.53 h) · Moon 58% (waning gibbous) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 19:55–20:30: quality 0.1M31 20:30–21:00: quality 0.4M31 21:00–21:25: quality 0.8M31 21:25–22:55: quality 0.9M31 22:55–23:10: quality 1.0M31 23:10–01:25: quality 0.8M31 01:25–05:15: quality 0.7M31 05:15–05:35: quality 0.6M31 05:35–06:05: quality 0.3M31 06:05–06:40: quality 0.1observe M31 23:50–01:30observe M31 05:35–06:05M42M42 03:20–03:25: quality 0.2M42 03:25–03:50: quality 0.3M42 03:50–04:20: quality 0.4M42 04:20–05:35: quality 0.5M42 05:35–06:05: quality 0.2M42 06:05–06:40: quality 0.1observe M42 04:50–05:35M45M45 23:45–23:55: quality 0.3M45 23:55–00:15: quality 0.4M45 00:15–00:35: quality 0.5M45 00:35–05:35: quality 0.6M45 05:35–06:05: quality 0.3M45 06:05–06:40: quality 0.1observe M45 03:10–04:50NGC 7000NGC 7000 19:55–20:30: quality 0.2NGC 7000 20:30–21:00: quality 0.5NGC 7000 21:00–23:10: quality 1.0NGC 7000 23:10–01:25: quality 0.9NGC 7000 01:25–02:50: quality 0.8NGC 7000 02:50–04:20: quality 0.7NGC 7000 04:20–04:35: quality 0.6NGC 7000 04:35–05:00: quality 0.5NGC 7000 05:00–05:20: quality 0.4NGC 7000 05:20–05:25: quality 0.3observe NGC 7000 20:30–22:10V1057 CygV1057 Cyg 19:55–20:30: quality 0.2V1057 Cyg 20:30–21:00: quality 0.5V1057 Cyg 21:00–23:10: quality 1.0V1057 Cyg 23:10–01:25: quality 0.9V1057 Cyg 01:25–02:50: quality 0.8V1057 Cyg 02:50–04:15: quality 0.7V1057 Cyg 04:15–04:35: quality 0.6V1057 Cyg 04:35–05:00: quality 0.5V1057 Cyg 05:00–05:20: quality 0.4V1057 Cyg 05:20–05:25: quality 0.3observe V1057 Cyg 22:10–23:50M33M33 21:10–21:15: quality 0.4M33 21:15–21:30: quality 0.5M33 21:30–21:45: quality 0.6M33 21:45–22:00: quality 0.7M33 22:00–22:45: quality 0.8M33 22:45–23:10: quality 0.9M33 23:10–03:50: quality 0.7M33 03:50–05:35: quality 0.6M33 05:35–06:05: quality 0.3M33 06:05–06:40: quality 0.1observe M33 01:30–03:10scheduleNGC 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
20:30–22:10 NGC 7000 1.67 0.85
22:10–23:50 V1057 Cyg 1.67 0.96
23:50–01:30 M31 1.67 0.77
01:30–03:10 M33 1.67 0.69
03:10–04:50 M45 1.67 0.58
04:50–05:35 M42 0.75 0.47
05:35–06:05 M31 0.5 0.31
06:05–07:10 — nothing worth pointing at — 1.08

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 97 unknown 21:00–05:35 (good) 89.7° at 02:15 56.7° 2.17
M42 Great Orion Nebula 13 unknown 03:35–05:35 (marginal) 42.9° at 07:05 28.9° 0.75
M45 Seven Sisters 52 unknown 03:10–03:25 (good) 72.5° at 05:15 17.1° 1.67
NGC 7000 North America Nebula 100 unknown 21:00–04:25 (good) 87.2° at 22:30 94.1° 1.67
V1057 Cyg 100 unknown 21:00–04:25 (good) 87.3° at 22:30 94.1° 1.67
M33 Triangulum Pinwheel 88 unknown 21:40–05:35 (good) 79.1° at 03:05 46.6° 1.67
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2030-09-18"

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"}.