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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, 24 August 2026 · astronomical night 21:48 → 04:58 (7.16 h) · Moon 90% (waxing gibbous) · weather: ERA5 history

M31M31 22:00–22:10: quality 0.2M31 22:10–23:00: quality 0.3M31 01:00–02:00: quality 0.1M31 02:00–03:25: quality 0.8M31 03:25–05:00: quality 1.0M31 05:00–05:40: quality 0.5M31 05:40–06:15: quality 0.2observe M31 02:00–02:40observe M31 05:20–05:40M42M42 05:00–05:15: quality 0.2M42 05:15–05:40: quality 0.3M42 05:40–06:15: quality 0.1M45M45 01:25–02:00: quality 0.1M45 02:00–02:05: quality 0.6M45 02:05–02:30: quality 0.7M45 02:30–03:25: quality 0.8M45 03:25–04:20: quality 0.9M45 04:20–05:00: quality 1.0M45 05:00–05:40: quality 0.5M45 05:40–06:15: quality 0.2observe M45 03:20–04:00NGC 7000NGC 7000 20:40–21:00: quality 0.1NGC 7000 22:00–23:00: quality 0.3NGC 7000 01:00–02:00: quality 0.1NGC 7000 02:00–02:50: quality 0.7NGC 7000 02:50–03:05: quality 0.8NGC 7000 03:05–03:25: quality 0.7NGC 7000 03:25–03:40: quality 1.0NGC 7000 03:40–05:00: quality 0.9NGC 7000 05:00–05:40: quality 0.4NGC 7000 05:40–06:15: quality 0.1observe NGC 7000 04:00–04:40V1057 CygV1057 Cyg 20:40–21:00: quality 0.1V1057 Cyg 22:00–23:00: quality 0.3V1057 Cyg 01:00–02:00: quality 0.1V1057 Cyg 02:00–02:50: quality 0.7V1057 Cyg 02:50–03:05: quality 0.8V1057 Cyg 03:05–03:25: quality 0.7V1057 Cyg 03:25–03:40: quality 1.0V1057 Cyg 03:40–05:00: quality 0.9V1057 Cyg 05:00–05:40: quality 0.4V1057 Cyg 05:40–06:15: quality 0.1observe V1057 Cyg 04:40–05:20M33M33 22:45–22:55: quality 0.1M33 22:55–23:00: quality 0.2M33 01:00–02:00: quality 0.1M33 02:00–02:50: quality 0.8M33 02:50–03:25: quality 0.9M33 03:25–05:00: quality 1.0M33 05:00–05:40: quality 0.5M33 05:40–06:15: quality 0.2observe M33 02:40–03:20scheduleM31M33M45NGC 7000V1057 Cyg22:0000:0002:0004:0006:00

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
20:05–02:00 — nothing worth pointing at — 5.92
02:00–02:40 M31 0.67 0.82
02:40–03:20 M33 0.67 0.85
03:20–04:00 M45 0.67 0.9
04:00–04:40 NGC 7000 0.67 0.9
04:40–05:20 V1057 Cyg 0.67 0.65
05:20–05:40 M31 0.33 0.5
05:40–06:40 — nothing worth pointing at — 1.0

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 100 57 02:00–05:00 (good) 89.5° at 03:50 94.4° 1.0
M42 Great Orion Nebula 2 2 05:30–05:40 (marginal) 42.9° at 08:45 136.1° 0.0
M45 Seven Sisters 82 75 02:00–05:00 (good) 72.5° at 06:55 125.3° 0.67
NGC 7000 North America Nebula 96 52 02:00–05:00 (good) 87.2° at 00:10 70.4° 0.67
V1057 Cyg 96 52 02:00–05:00 (good) 87.3° at 00:10 70.3° 0.67
M33 Triangulum Pinwheel 100 63 02:00–05:00 (good) 79.1° at 04:45 99.1° 0.67

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2026-08-24"

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"}.