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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, 14 September 2027 · astronomical night 21:07 → 05:26 (8.31 h) · Moon 99% (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 21:10–03:40: quality 0.5M31 03:40–05:30: quality 0.6M31 05:30–06:00: quality 0.3M31 06:00–06:35: quality 0.1observe M31 00:10–01:40M42M42 03:35–03:45: quality 0.3M42 03:45–04:00: quality 0.4M42 04:00–04:20: quality 0.5M42 04:20–04:40: quality 0.6M42 04:40–05:30: quality 0.7M42 05:30–06:00: quality 0.4M42 06:00–06:35: quality 0.1observe M42 04:40–06:00M45M45 00:00–00:20: quality 0.3M45 00:20–00:45: quality 0.4M45 00:45–01:45: quality 0.5M45 01:45–03:15: quality 0.6M45 03:15–05:30: quality 0.7M45 05:30–06:00: quality 0.4M45 06:00–06:20: quality 0.1M45 06:20–06:35: quality 0.2observe M45 01:40–03:10NGC 7000NGC 7000 20:05–20:35: quality 0.1NGC 7000 20:35–21:10: quality 0.3NGC 7000 21:10–21:35: quality 0.6NGC 7000 21:35–04:40: quality 0.5NGC 7000 04:40–05:15: quality 0.4NGC 7000 05:15–05:30: quality 0.3NGC 7000 05:30–05:40: quality 0.1observe NGC 7000 21:10–22:40V1057 CygV1057 Cyg 20:05–20:35: quality 0.1V1057 Cyg 20:35–21:10: quality 0.3V1057 Cyg 21:10–21:35: quality 0.6V1057 Cyg 21:35–04:40: quality 0.5V1057 Cyg 04:40–05:15: quality 0.4V1057 Cyg 05:15–05:30: quality 0.3V1057 Cyg 05:30–05:40: quality 0.1observe V1057 Cyg 22:40–00:10M33M33 21:25–21:35: quality 0.2M33 21:35–22:05: quality 0.3M33 22:05–00:10: quality 0.4M33 00:10–03:40: quality 0.5M33 03:40–05:30: quality 0.6M33 05:30–06:00: quality 0.3M33 06:00–06:35: quality 0.1observe M33 03:10–04:40scheduleNGC 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
19:30–21:10 — nothing worth pointing at — 1.67
21:10–22:40 NGC 7000 1.5 0.54
22:40–00:10 V1057 Cyg 1.5 0.5
00:10–01:40 M31 1.5 0.48
01:40–03:10 M45 1.5 0.59
03:10–04:40 M33 1.5 0.56
04:40–06:00 M42 1.33 0.56
06:00–07:05 — nothing worth pointing at — 1.08

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 63 unknown 04:45–05:30 (good) 89.7° at 02:30 54.0° 1.5
M42 Great Orion Nebula 23 unknown 04:30–05:30 (good) 42.9° at 07:20 102.3° 1.33
M45 Seven Sisters 65 unknown 02:35–05:30 (good) 72.5° at 05:35 79.3° 1.5
NGC 7000 North America Nebula 57 unknown 21:10–05:30 (marginal) 87.2° at 22:45 55.0° 1.5
V1057 Cyg 57 unknown 21:10–05:30 (marginal) 87.3° at 22:45 54.9° 1.5
M33 Triangulum Pinwheel 64 unknown 04:40–05:30 (good) 79.1° at 03:20 54.4° 1.5
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2027-09-14"

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"}.