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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 Tuesday, 25 August 2026 · astronomical night 21:46 → 04:59 (7.22 h) · Moon 95% (waxing gibbous) · weather: ERA5 history

M31M31 21:10–21:20: quality 0.1M31 21:20–21:50: quality 0.2M31 21:50–22:00: quality 0.4M31 22:00–22:35: quality 0.5M31 22:35–00:00: quality 0.6M31 00:00–03:00: quality 0.7M31 03:00–04:30: quality 0.8M31 04:30–05:00: quality 1.0M31 05:00–05:40: quality 0.5M31 05:40–06:15: quality 0.1observe M31 00:30–01:50observe M31 05:00–05:30M42M42 04:55–05:00: quality 0.4M42 05:00–05:15: quality 0.2M42 05:15–05:40: quality 0.3M42 05:40–06:15: quality 0.1observe M42 04:55–05:00observe M42 05:30–05:40M45M45 01:20–01:35: quality 0.4M45 01:35–01:50: quality 0.5M45 01:50–02:10: quality 0.6M45 02:10–03:00: quality 0.7M45 03:00–04:25: quality 0.8M45 04:25–04:30: quality 0.9M45 04:30–05:00: quality 1.0M45 05:00–05:40: quality 0.5M45 05:40–06:15: quality 0.1observe M45 03:10–04:55NGC 7000NGC 7000 20:35–21:10: quality 0.1NGC 7000 21:10–21:50: quality 0.3NGC 7000 21:50–02:30: quality 0.6NGC 7000 02:30–04:00: quality 0.7NGC 7000 04:00–04:30: quality 0.6NGC 7000 04:30–04:45: quality 0.9NGC 7000 04:45–05:00: quality 0.8NGC 7000 05:00–05:40: quality 0.4NGC 7000 05:40–06:15: quality 0.1observe NGC 7000 21:50–23:10V1057 CygV1057 Cyg 20:35–21:10: quality 0.1V1057 Cyg 21:10–21:50: quality 0.3V1057 Cyg 21:50–02:30: quality 0.6V1057 Cyg 02:30–04:00: quality 0.7V1057 Cyg 04:00–04:30: quality 0.6V1057 Cyg 04:30–04:45: quality 0.9V1057 Cyg 04:45–05:00: quality 0.8V1057 Cyg 05:00–05:40: quality 0.4V1057 Cyg 05:40–06:15: quality 0.1observe V1057 Cyg 23:10–00:30M33M33 22:45–23:00: quality 0.3M33 23:00–23:15: quality 0.4M33 23:15–23:35: quality 0.5M33 23:35–00:50: quality 0.6M33 00:50–02:45: quality 0.7M33 02:45–04:30: quality 0.8M33 04:30–05:00: quality 1.0M33 05:00–05:40: quality 0.5M33 05:40–06:15: quality 0.1observe M33 01:50–03:10scheduleNGC 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
20:05–21:50 — nothing worth pointing at — 1.75
21:50–23:10 NGC 7000 1.33 0.59
23:10–00:30 V1057 Cyg 1.33 0.61
00:30–01:50 M31 1.33 0.71
01:50–03:10 M33 1.33 0.74
03:10–04:55 M45 1.75 0.85
04:55–05:00 M42 0.08 0.41
05:00–05:30 M31 0.5 0.47
05:30–05:40 M42 0.17 0.31
05:40–06:45 — nothing worth pointing at — 1.08

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 100 98 23:10–05:00 (good) 89.5° at 03:50 83.7° 1.83
M42 Great Orion Nebula 3 3 05:30–05:40 (marginal) 42.9° at 08:40 128.0° 0.25
M45 Seven Sisters 79 77 02:00–05:00 (good) 72.5° at 06:50 113.1° 1.75
NGC 7000 North America Nebula 88 85 23:00–05:00 (good) 87.3° at 00:05 65.1° 1.33
V1057 Cyg 88 85 23:00–05:00 (good) 87.3° at 00:05 65.0° 1.33
M33 Triangulum Pinwheel 100 98 00:00–05:00 (good) 79.1° at 04:40 87.3° 1.33
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2026-08-25"

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"}.