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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, 30 August 2026 · astronomical night 21:36 → 05:06 (7.5 h) · Moon 92% (waning gibbous) · weather: ERA5 history

M31M31 20:50–20:55: quality 0.1M31 21:05–21:15: quality 0.1M31 21:15–21:40: quality 0.2M31 21:40–05:10: quality 0.4M31 05:10–05:45: quality 0.2M31 05:45–06:20: quality 0.1observe M31 23:55–01:20M42M42 04:35–05:00: quality 0.3M42 05:00–05:10: quality 0.4M42 05:10–05:40: quality 0.2M42 05:40–05:45: quality 0.3M42 05:45–06:20: quality 0.1observe M42 04:50–05:10M45M45 01:00–01:15: quality 0.2M45 01:15–01:45: quality 0.3M45 01:45–04:35: quality 0.4M45 04:35–05:10: quality 0.5M45 05:10–05:45: quality 0.2M45 05:45–06:20: quality 0.1observe M45 02:45–04:50NGC 7000NGC 7000 20:30–21:05: quality 0.1NGC 7000 21:05–21:40: quality 0.3NGC 7000 21:40–00:40: quality 0.6NGC 7000 00:40–04:10: quality 0.5NGC 7000 04:10–05:10: quality 0.4NGC 7000 05:10–05:45: quality 0.2NGC 7000 05:45–06:05: quality 0.1observe NGC 7000 21:05–22:30V1057 CygV1057 Cyg 20:30–21:05: quality 0.1V1057 Cyg 21:05–21:40: quality 0.3V1057 Cyg 21:40–00:40: quality 0.6V1057 Cyg 00:40–04:10: quality 0.5V1057 Cyg 04:10–05:10: quality 0.4V1057 Cyg 05:10–05:45: quality 0.2V1057 Cyg 05:45–06:05: quality 0.1observe V1057 Cyg 22:30–23:55M33M33 22:25–22:40: quality 0.2M33 22:40–23:15: quality 0.3M33 23:15–00:55: quality 0.4M33 00:55–01:00: quality 0.3M33 01:00–01:25: quality 0.4M33 01:25–05:00: quality 0.3M33 05:00–05:10: quality 0.4M33 05:10–05:45: quality 0.2M33 05:45–06:20: quality 0.1observe M33 01:20–02:45scheduleNGC 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
19:55–21:05 — nothing worth pointing at — 1.17
21:05–22:30 NGC 7000 1.42 0.49
22:30–23:55 V1057 Cyg 1.42 0.59
23:55–01:20 M31 1.42 0.41
01:20–02:45 M33 1.42 0.34
02:45–04:50 M45 2.08 0.42
04:50–05:10 M42 0.33 0.35
05:10–06:50 — nothing worth pointing at — 1.67

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 37 36 21:40–05:10 (marginal) 89.6° at 03:30 33.8° 1.42
M42 Great Orion Nebula 3 3 04:50–05:10 (marginal) 42.9° at 08:20 76.1° 0.33
M45 Seven Sisters 21 21 01:30–05:10 (marginal) 72.5° at 06:30 48.7° 2.08
NGC 7000 North America Nebula 69 67 22:00–22:45 (good) 87.3° at 23:45 59.4° 1.42
V1057 Cyg 69 67 22:00–22:45 (good) 87.3° at 23:45 59.4° 1.42
M33 Triangulum Pinwheel 23 23 23:00–05:10 (marginal) 79.1° at 04:20 27.0° 1.42
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2026-08-30"

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"}.