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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 Sunday, 03 August 2025 · astronomical night 22:28 → 04:26 (5.97 h) · Moon 72% (waxing gibbous) · weather: ERA5 history

M31M31 22:35–22:50: quality 0.4M31 22:50–23:10: quality 0.5M31 23:10–23:25: quality 0.6M31 23:25–23:55: quality 0.7M31 23:55–01:00: quality 0.8M31 01:00–01:55: quality 0.9M31 01:55–04:00: quality 1.0M31 04:00–04:30: quality 0.9M31 04:30–05:10: quality 0.5M31 05:10–05:50: quality 0.1observe M31 00:50–02:20M42M45M45 02:45–02:50: quality 0.4M45 02:50–03:05: quality 0.5M45 03:05–03:20: quality 0.6M45 03:20–03:30: quality 0.7M45 03:30–04:30: quality 0.8M45 04:30–05:05: quality 0.4M45 05:05–05:10: quality 0.5M45 05:10–05:50: quality 0.1observe M45 03:50–05:10NGC 7000NGC 7000 21:10–21:50: quality 0.1NGC 7000 21:50–22:30: quality 0.4NGC 7000 22:30–23:55: quality 0.8NGC 7000 23:55–01:00: quality 0.9NGC 7000 01:00–04:00: quality 1.0NGC 7000 04:00–04:30: quality 0.9NGC 7000 04:30–04:50: quality 0.5NGC 7000 04:50–05:00: quality 0.4NGC 7000 05:00–05:10: quality 0.5NGC 7000 05:10–05:50: quality 0.1observe NGC 7000 21:50–23:20V1057 CygV1057 Cyg 21:10–21:50: quality 0.1V1057 Cyg 21:50–22:30: quality 0.4V1057 Cyg 22:30–23:55: quality 0.8V1057 Cyg 23:55–01:00: quality 0.9V1057 Cyg 01:00–04:00: quality 1.0V1057 Cyg 04:00–04:30: quality 0.9V1057 Cyg 04:30–04:50: quality 0.5V1057 Cyg 04:50–05:00: quality 0.4V1057 Cyg 05:00–05:10: quality 0.5V1057 Cyg 05:10–05:50: quality 0.1observe V1057 Cyg 23:20–00:50M33M33 00:10–00:20: quality 0.4M33 00:20–00:35: quality 0.5M33 00:35–00:50: quality 0.6M33 00:50–01:00: quality 0.7M33 01:00–01:45: quality 0.8M33 01:45–03:05: quality 0.9M33 03:05–04:00: quality 1.0M33 04:00–04:30: quality 0.9M33 04:30–05:10: quality 0.5M33 05:10–05:50: quality 0.1observe M33 02:20–03:50scheduleNGC 7000V1057 CygM31M33M4522:0000:0002:0004:0006:00

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
20:35–21:50 — nothing worth pointing at — 1.25
21:50–23:20 NGC 7000 1.5 0.64
23:20–00:50 V1057 Cyg 1.5 0.86
00:50–02:20 M31 1.5 0.92
02:20–03:50 M33 1.5 0.95
03:50–05:10 M45 1.33 0.61
05:10–06:20 — nothing worth pointing at — 1.17

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 100 99 23:20–04:30 (good) 89.6° at 05:15 133.0° 1.5
M42 Great Orion Nebula 0 0 — 42.9° at 10:05 143.4° 0.0
M45 Seven Sisters 35 34 03:10–04:30 (good) 72.5° at 08:15 171.5° 1.33
NGC 7000 North America Nebula 100 99 22:30–04:30 (good) 87.3° at 01:30 95.0° 1.5
V1057 Cyg 100 99 22:30–04:30 (good) 87.3° at 01:30 94.9° 1.5
M33 Triangulum Pinwheel 100 99 00:45–04:30 (good) 79.1° at 06:05 143.1° 1.5

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2025-08-03"

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"}.