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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, 15 September 2027 · astronomical night 21:05 → 05:27 (8.36 h) · Moon 100% (full moon) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 20:20–20:35: quality 0.1M31 20:35–21:10: quality 0.2M31 21:10–03:50: quality 0.4M31 03:50–05:30: quality 0.5M31 05:30–06:05: quality 0.3M31 06:05–06:35: quality 0.1observe M31 00:10–01:45M42M42 03:35–03:45: quality 0.3M42 03:45–04:10: quality 0.4M42 04:10–04:30: quality 0.5M42 04:30–05:30: quality 0.6M42 05:30–06:05: quality 0.3M42 06:05–06:35: quality 0.1observe M42 04:55–06:05M45M45 23:55–00:05: quality 0.2M45 00:05–00:30: quality 0.3M45 00:30–01:25: quality 0.4M45 01:25–03:20: quality 0.5M45 03:20–05:30: quality 0.6M45 05:30–06:05: quality 0.3M45 06:05–06:35: quality 0.1observe M45 01:45–03:20NGC 7000NGC 7000 20:00–20:35: quality 0.1NGC 7000 20:35–21:10: quality 0.3NGC 7000 21:10–21:40: quality 0.6NGC 7000 21:40–01:50: quality 0.5NGC 7000 01:50–05:00: quality 0.4NGC 7000 05:00–05:30: quality 0.3NGC 7000 05:30–05:40: quality 0.1observe NGC 7000 20:35–20:45observe NGC 7000 21:10–22:35V1057 CygV1057 Cyg 20:00–20:35: quality 0.1V1057 Cyg 20:35–21:10: quality 0.3V1057 Cyg 21:10–21:40: quality 0.6V1057 Cyg 21:40–01:50: quality 0.5V1057 Cyg 01:50–05:00: quality 0.4V1057 Cyg 05:00–05:30: quality 0.3V1057 Cyg 05:30–05:35: quality 0.1observe V1057 Cyg 22:35–00:10M33M33 21:20–21:35: quality 0.2M33 21:35–22:15: quality 0.3M33 22:15–04:05: quality 0.4M33 04:05–05:30: quality 0.5M33 05:30–06:05: quality 0.3M33 06:05–06:35: quality 0.1observe M33 03:20–04:55scheduleNGC 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
19:30–20:35 — nothing worth pointing at — 1.08
20:35–20:45 NGC 7000 0.17 0.3
20:45–21:10 — nothing worth pointing at — 0.42
21:10–22:35 NGC 7000 1.42 0.54
22:35–00:10 V1057 Cyg 1.58 0.49
00:10–01:45 M31 1.58 0.4
01:45–03:20 M45 1.58 0.51
03:20–04:55 M33 1.58 0.45
04:55–06:05 M42 1.17 0.48
06:05–07:05 — nothing worth pointing at — 1.0

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 51 unknown 21:10–05:30 (marginal) 89.6° at 02:25 44.6° 1.58
M42 Great Orion Nebula 20 unknown 04:50–05:30 (good) 42.9° at 07:20 92.1° 1.17
M45 Seven Sisters 49 unknown 04:30–05:30 (good) 72.5° at 05:30 67.1° 1.58
NGC 7000 North America Nebula 57 unknown 21:10–05:15 (marginal) 87.2° at 22:45 55.0° 1.58
V1057 Cyg 57 unknown 21:10–05:15 (marginal) 87.3° at 22:45 55.0° 1.58
M33 Triangulum Pinwheel 45 unknown 21:55–05:30 (marginal) 79.1° at 03:20 42.9° 1.58
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2027-09-15"

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"}.