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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, 22 October 2025 · astronomical night 20:01 → 06:09 (10.13 h) · Moon 2% (new moon) · weather: ERA5 history

M31M31 20:00–20:05: quality 0.3M31 20:05–20:45: quality 0.6M31 20:45–21:00: quality 0.7M31 21:00–22:00: quality 0.9M31 22:00–23:00: quality 0.6M31 23:00–00:00: quality 0.9observe M31 21:40–22:30M42M45M45 21:30–21:45: quality 0.4M45 21:45–22:00: quality 0.5M45 22:00–22:15: quality 0.4M45 22:15–23:00: quality 0.5M45 23:00–00:00: quality 0.8observe M45 23:20–00:00NGC 7000NGC 7000 20:00–20:05: quality 0.3NGC 7000 20:05–21:00: quality 0.7NGC 7000 21:00–22:00: quality 0.9NGC 7000 22:00–23:00: quality 0.6NGC 7000 23:00–23:50: quality 0.9NGC 7000 23:50–00:00: quality 0.8observe NGC 7000 20:00–20:50V1057 CygV1057 Cyg 20:00–20:05: quality 0.3V1057 Cyg 20:05–21:00: quality 0.7V1057 Cyg 21:00–22:00: quality 0.9V1057 Cyg 22:00–23:00: quality 0.6V1057 Cyg 23:00–23:50: quality 0.9V1057 Cyg 23:50–00:00: quality 0.8observe V1057 Cyg 20:50–21:40M33M33 20:00–20:05: quality 0.3M33 20:05–21:00: quality 0.6M33 21:00–21:50: quality 0.8M33 21:50–22:00: quality 0.9M33 22:00–23:00: quality 0.6M33 23:00–00:00: quality 0.9observe M33 22:30–23:20scheduleNGC 7000V1057 CygM31M3320:0022:0000:0002:0004:0006:00

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
18:25–20:00 — nothing worth pointing at — 1.58
20:00–20:50 NGC 7000 0.83 0.64
20:50–21:40 V1057 Cyg 0.83 0.86
21:40–22:30 M31 0.83 0.73
22:30–23:20 M33 0.83 0.73
23:20–00:00 M45 0.67 0.81
00:00–07:45 — nothing worth pointing at — 7.75

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 100 30 20:05–00:00 (good) 89.7° at 00:00 146.8° 0.83
M42 Great Orion Nebula 89 0 — 42.9° at 04:50 130.8° 0.0
M45 Seven Sisters 100 18 23:00–00:00 (good) 72.5° at 03:00 165.4° 0.67
NGC 7000 North America Nebula 100 45 20:05–00:00 (good) 87.3° at 20:15 106.6° 0.83
V1057 Cyg 100 45 20:05–00:00 (good) 87.3° at 20:15 106.6° 0.83
M33 Triangulum Pinwheel 100 29 22:20–00:00 (good) 79.1° at 00:50 161.0° 0.83

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2025-10-22"

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"}.