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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, 04 August 2025 · astronomical night 22:26 → 04:28 (6.03 h) · Moon 80% (waxing gibbous) · weather: ERA5 history

M31M31 22:35–22:40: quality 0.2M31 22:40–23:00: quality 0.3M31 23:00–23:30: quality 0.2M31 23:30–00:00: quality 0.3M31 01:00–02:00: quality 0.1M31 02:00–03:00: quality 0.7M31 03:00–04:00: quality 0.9M31 04:00–04:30: quality 0.2M31 04:30–05:00: quality 0.1observe M31 02:35–03:10M42M45M45 02:40–02:50: quality 0.3M45 02:50–03:00: quality 0.4M45 03:00–03:05: quality 0.5M45 03:05–03:20: quality 0.6M45 03:20–03:35: quality 0.7M45 03:35–04:00: quality 0.8M45 04:00–05:00: quality 0.1observe M45 03:45–04:00NGC 7000NGC 7000 21:10–21:45: quality 0.1NGC 7000 21:45–22:00: quality 0.3NGC 7000 22:00–22:30: quality 0.2NGC 7000 22:30–23:00: quality 0.5NGC 7000 23:00–00:00: quality 0.3NGC 7000 01:00–02:00: quality 0.1NGC 7000 02:00–03:00: quality 0.7NGC 7000 03:00–04:00: quality 0.9NGC 7000 04:00–04:30: quality 0.2NGC 7000 04:30–05:00: quality 0.1observe NGC 7000 21:45–22:00observe NGC 7000 22:30–23:00V1057 CygV1057 Cyg 21:10–21:45: quality 0.1V1057 Cyg 21:45–22:00: quality 0.3V1057 Cyg 22:00–22:30: quality 0.2V1057 Cyg 22:30–23:00: quality 0.5V1057 Cyg 23:00–00:00: quality 0.3V1057 Cyg 01:00–02:00: quality 0.1V1057 Cyg 02:00–03:00: quality 0.7V1057 Cyg 03:00–04:00: quality 0.9V1057 Cyg 04:00–04:30: quality 0.2V1057 Cyg 04:30–05:00: quality 0.1observe V1057 Cyg 02:00–02:35M33M33 01:00–02:00: quality 0.1M33 02:00–03:00: quality 0.7M33 03:00–04:00: quality 0.9M33 04:00–04:30: quality 0.2M33 04:30–05:00: quality 0.1observe M33 03:10–03:45scheduleV1057 CygM31M3322:0000:0002:0004:0006:00

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
20:35–21:45 — nothing worth pointing at — 1.17
21:45–22:00 NGC 7000 0.25 0.31
22:00–22:30 — nothing worth pointing at — 0.5
22:30–23:00 NGC 7000 0.5 0.5
23:00–02:00 — nothing worth pointing at — 3.0
02:00–02:35 V1057 Cyg 0.58 0.74
02:35–03:10 M31 0.58 0.8
03:10–03:45 M33 0.58 0.91
03:45–04:00 M45 0.25 0.77
04:00–06:20 — nothing worth pointing at — 2.33

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 100 41 02:00–04:00 (good) 89.7° at 05:10 123.8° 0.58
M42 Great Orion Nebula 0 0 — 42.9° at 10:00 146.1° 0.0
M45 Seven Sisters 38 20 03:15–04:00 (good) 72.5° at 08:15 159.4° 0.25
NGC 7000 North America Nebula 100 44 02:00–04:00 (good) 87.3° at 01:25 88.5° 0.75
V1057 Cyg 100 44 02:00–04:00 (good) 87.3° at 01:25 88.5° 0.58
M33 Triangulum Pinwheel 100 44 02:00–04:00 (good) 79.1° at 06:00 132.0° 0.58

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2025-08-04"

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"}.