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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, 17 September 2030 · astronomical night 21:01 → 05:30 (8.48 h) · Moon 68% (waning gibbous) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 20:00–20:30: quality 0.1M31 20:30–21:05: quality 0.4M31 21:05–21:30: quality 0.8M31 21:30–22:25: quality 0.9M31 22:25–01:30: quality 0.7M31 01:30–05:15: quality 0.6M31 05:15–05:35: quality 0.5M31 05:35–06:05: quality 0.3M31 06:05–06:40: quality 0.1observe M31 23:40–01:15M42M42 03:25–03:35: quality 0.2M42 03:35–04:10: quality 0.3M42 04:10–05:35: quality 0.4M42 05:35–06:05: quality 0.2M42 06:05–06:40: quality 0.1observe M42 04:25–05:35M45M45 23:50–00:05: quality 0.3M45 00:05–00:30: quality 0.4M45 00:30–05:35: quality 0.5M45 05:35–06:05: quality 0.2M45 06:05–06:40: quality 0.1observe M45 02:50–04:25NGC 7000NGC 7000 20:00–20:30: quality 0.2NGC 7000 20:30–21:05: quality 0.5NGC 7000 21:05–22:25: quality 1.0NGC 7000 22:25–23:05: quality 0.9NGC 7000 23:05–02:00: quality 0.8NGC 7000 02:00–03:25: quality 0.7NGC 7000 03:25–04:30: quality 0.6NGC 7000 04:30–04:55: quality 0.5NGC 7000 04:55–05:15: quality 0.4NGC 7000 05:15–05:30: quality 0.3observe NGC 7000 20:30–22:05V1057 CygV1057 Cyg 20:00–20:30: quality 0.2V1057 Cyg 20:30–21:05: quality 0.5V1057 Cyg 21:05–22:25: quality 1.0V1057 Cyg 22:25–23:05: quality 0.9V1057 Cyg 23:05–02:00: quality 0.8V1057 Cyg 02:00–03:25: quality 0.7V1057 Cyg 03:25–04:30: quality 0.6V1057 Cyg 04:30–04:55: quality 0.5V1057 Cyg 04:55–05:15: quality 0.4V1057 Cyg 05:15–05:30: quality 0.3observe V1057 Cyg 22:05–23:40M33M33 21:15–21:20: quality 0.4M33 21:20–21:35: quality 0.5M33 21:35–21:50: quality 0.6M33 21:50–22:05: quality 0.7M33 22:05–22:25: quality 0.8M33 22:25–03:00: quality 0.6M33 03:00–05:35: quality 0.5M33 05:35–06:05: quality 0.2M33 06:05–06:40: quality 0.1observe M33 01:15–02:50scheduleNGC 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
20:30–22:05 NGC 7000 1.58 0.82
22:05–23:40 V1057 Cyg 1.58 0.88
23:40–01:15 M31 1.58 0.69
01:15–02:50 M33 1.58 0.59
02:50–04:25 M45 1.58 0.5
04:25–05:35 M42 1.17 0.41
05:35–07:05 — nothing worth pointing at — 1.5

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 91 unknown 21:05–03:00 (good) 89.5° at 02:20 47.5° 1.58
M42 Great Orion Nebula 10 unknown 03:50–05:35 (marginal) 42.9° at 07:10 34.2° 1.17
M45 Seven Sisters 38 unknown 23:55–05:35 (marginal) 72.5° at 05:20 5.9° 1.58
NGC 7000 North America Nebula 100 unknown 21:05–04:20 (good) 87.2° at 22:35 86.9° 1.58
V1057 Cyg 100 unknown 21:05–04:20 (good) 87.3° at 22:35 86.9° 1.58
M33 Triangulum Pinwheel 82 unknown 21:40–01:40 (good) 79.1° at 03:10 35.9° 1.58
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2030-09-17"

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"}.