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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 Monday, 20 October 2025 · astronomical night 20:04 → 06:07 (10.04 h) · Moon 0% (new moon) · weather: ERA5 history

M31M31 19:05–19:35: quality 0.1M31 19:35–20:05: quality 0.4M31 20:05–21:00: quality 0.9M31 21:00–22:00: quality 0.3M31 22:00–23:00: quality 0.2M31 23:00–00:00: quality 0.1observe M31 21:35–22:00M42M45M45 21:35–21:50: quality 0.1M45 21:50–22:00: quality 0.2M45 22:00–22:15: quality 0.1M45 22:15–23:00: quality 0.2M45 23:00–00:00: quality 0.1NGC 7000NGC 7000 19:05–19:35: quality 0.2NGC 7000 19:35–20:05: quality 0.5NGC 7000 20:05–21:00: quality 1.0NGC 7000 21:00–22:00: quality 0.3NGC 7000 22:00–23:00: quality 0.2NGC 7000 23:00–00:00: quality 0.1observe NGC 7000 19:35–20:15V1057 CygV1057 Cyg 19:05–19:35: quality 0.2V1057 Cyg 19:35–20:05: quality 0.5V1057 Cyg 20:05–21:00: quality 1.0V1057 Cyg 21:00–22:00: quality 0.3V1057 Cyg 22:00–23:00: quality 0.2V1057 Cyg 23:00–00:00: quality 0.1observe V1057 Cyg 20:55–21:35M33M33 19:05–19:35: quality 0.1M33 19:35–19:45: quality 0.3M33 19:45–20:05: quality 0.4M33 20:05–20:55: quality 0.8M33 20:55–21:00: quality 0.9M33 21:00–22:00: quality 0.3M33 22:00–23:00: quality 0.2M33 23:00–00:00: quality 0.1observe M33 20:15–20:55schedule20:0022:0000:0002:0004:0006:00

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
18:30–19:35 — nothing worth pointing at — 1.08
19:35–20:15 NGC 7000 0.67 0.62
20:15–20:55 M33 0.67 0.83
20:55–21:35 V1057 Cyg 0.67 0.38
21:35–22:00 M31 0.42 0.3
22:00–07:45 — nothing worth pointing at — 9.75

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 100 18 20:05–21:00 (good) 89.5° at 00:05 148.9° 0.42
M42 Great Orion Nebula 89 0 — 42.9° at 05:00 113.0° 0.0
M45 Seven Sisters 100 4 — 72.5° at 03:10 141.5° 0.0
NGC 7000 North America Nebula 100 28 20:05–21:00 (good) 87.2° at 20:25 116.2° 0.67
V1057 Cyg 100 28 20:05–21:00 (good) 87.3° at 20:25 116.3° 0.67
M33 Triangulum Pinwheel 100 16 20:05–21:00 (good) 79.1° at 01:00 159.7° 0.67

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2025-10-20"

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"}.