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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 Saturday, 30 August 2025 · astronomical night 21:36 → 05:07 (7.51 h) · Moon 47% (waxing crescent) · weather: ERA5 history

M31M31 20:50–21:00: quality 0.1M31 21:05–21:10: quality 0.1M31 21:10–21:40: quality 0.2M31 21:40–21:50: quality 0.4M31 21:50–22:00: quality 0.5M31 23:00–23:55: quality 0.8M31 23:55–01:00: quality 0.9M31 01:00–02:00: quality 1.0M31 02:00–03:00: quality 0.7M31 03:00–04:00: quality 1.0observe M31 00:50–01:55M42M45M45 01:00–01:05: quality 0.4M45 01:05–01:20: quality 0.5M45 01:20–01:30: quality 0.6M45 01:30–01:45: quality 0.7M45 01:45–02:00: quality 0.8M45 02:00–02:10: quality 0.5M45 02:10–03:00: quality 0.6M45 03:00–04:00: quality 0.9observe M45 03:00–04:00NGC 7000NGC 7000 20:30–21:05: quality 0.1NGC 7000 21:05–21:40: quality 0.3NGC 7000 21:40–22:00: quality 0.6NGC 7000 23:00–01:00: quality 0.9NGC 7000 01:00–02:00: quality 1.0NGC 7000 02:00–02:50: quality 0.7NGC 7000 02:50–03:00: quality 0.6NGC 7000 03:00–03:05: quality 1.0NGC 7000 03:05–04:00: quality 0.9observe NGC 7000 21:40–22:00observe NGC 7000 23:00–23:45V1057 CygV1057 Cyg 20:30–21:05: quality 0.1V1057 Cyg 21:05–21:40: quality 0.3V1057 Cyg 21:40–22:00: quality 0.6V1057 Cyg 23:00–01:00: quality 0.9V1057 Cyg 01:00–02:00: quality 1.0V1057 Cyg 02:00–02:50: quality 0.7V1057 Cyg 02:50–03:00: quality 0.6V1057 Cyg 03:00–03:05: quality 1.0V1057 Cyg 03:05–04:00: quality 0.9observe V1057 Cyg 23:45–00:50M33M33 23:00–23:05: quality 0.6M33 23:05–23:40: quality 0.7M33 23:40–01:00: quality 0.8M33 01:00–01:20: quality 0.9M33 01:20–02:00: quality 1.0M33 02:00–03:00: quality 0.7M33 03:00–04:00: quality 1.0observe M33 01:55–03:00scheduleNGC 7000V1057 CygM31M33M4520:0022:0000:0002:0004:0006:00

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
19:55–21:40 — nothing worth pointing at — 1.75
21:40–22:00 NGC 7000 0.33 0.56
22:00–23:00 — nothing worth pointing at — 1.0
23:00–23:45 NGC 7000 0.75 0.91
23:45–00:50 V1057 Cyg 1.08 0.92
00:50–01:55 M31 1.08 0.99
01:55–03:00 M33 1.08 0.69
03:00–04:00 M45 1.0 0.91
04:00–06:50 — nothing worth pointing at — 2.83

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 100 61 23:00–04:00 (good) 89.5° at 03:25 136.0° 1.08
M42 Great Orion Nebula 9 0 — 42.9° at 08:20 141.6° 0.0
M45 Seven Sisters 98 53 03:00–04:00 (good) 72.5° at 06:30 175.6° 1.0
NGC 7000 North America Nebula 100 62 23:00–04:00 (good) 87.2° at 23:45 97.2° 1.08
V1057 Cyg 100 62 23:00–04:00 (good) 87.3° at 23:45 97.2° 1.08
M33 Triangulum Pinwheel 100 64 23:00–04:00 (good) 79.1° at 04:20 146.7° 1.08

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2025-08-30"

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"}.