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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 October 2025 · astronomical night 20:11 → 06:01 (9.83 h) · Moon 28% (waning crescent) · weather: ERA5 history

M31M31 23:00–00:00: quality 0.8M31 05:00–06:05: quality 0.4M31 06:05–06:30: quality 0.2M31 06:30–06:35: quality 0.1M42M42 05:00–06:05: quality 0.4M42 06:05–06:35: quality 0.2M42 06:35–07:10: quality 0.1M45M45 23:00–00:00: quality 0.7M45 05:00–06:05: quality 0.4M45 06:05–06:35: quality 0.2M45 06:35–07:10: quality 0.1observe M45 05:00–05:35NGC 7000NGC 7000 23:00–00:00: quality 0.8observe NGC 7000 23:00–23:35V1057 CygV1057 Cyg 23:00–00:00: quality 0.8observe V1057 Cyg 23:35–00:00M33M33 23:00–00:00: quality 0.8M33 05:00–06:05: quality 0.4M33 06:05–06:35: quality 0.2M33 07:00–07:05: quality 0.1observe M33 05:35–06:05schedule20:0022:0000:0002:0004:0006:00

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
18:35–23:00 — nothing worth pointing at — 4.42
23:00–23:35 NGC 7000 0.58 0.84
23:35–00:00 V1057 Cyg 0.42 0.83
00:00–05:00 — nothing worth pointing at — 5.0
05:00–05:35 M45 0.58 0.44
05:35–06:05 M33 0.5 0.39
06:05–07:35 — nothing worth pointing at — 1.5

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 100 14 23:00–00:00 (good) 89.6° at 00:25 106.4° 0.0
M42 Great Orion Nebula 69 11 05:00–06:05 (marginal) 42.9° at 05:20 62.3° 0.0
M45 Seven Sisters 100 18 23:00–00:00 (good) 72.5° at 03:30 79.5° 0.58
NGC 7000 North America Nebula 100 12 23:00–00:00 (good) 87.2° at 20:45 117.9° 0.58
V1057 Cyg 100 12 23:00–00:00 (good) 87.3° at 20:45 117.9° 0.42
M33 Triangulum Pinwheel 100 15 23:00–00:00 (good) 79.1° at 01:20 104.3° 0.5

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2025-10-15"

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"}.