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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 Thursday, 13 August 2026 · astronomical night 22:10 → 04:41 (6.53 h) · Moon 2% (new moon) · weather: ERA5 history

M31M31 22:00–22:05: quality 0.1M31 22:05–22:15: quality 0.2M31 22:15–22:40: quality 0.4M31 22:40–23:00: quality 0.5M31 23:00–23:35: quality 0.6M31 23:35–00:00: quality 0.7M31 00:00–01:00: quality 0.6observe M31 23:25–00:20M42M45NGC 7000NGC 7000 20:55–21:35: quality 0.1NGC 7000 21:35–22:00: quality 0.4NGC 7000 22:00–22:15: quality 0.3NGC 7000 22:15–23:00: quality 0.7NGC 7000 23:00–00:00: quality 0.8NGC 7000 00:00–01:00: quality 0.6observe NGC 7000 21:35–22:30V1057 CygV1057 Cyg 20:55–21:35: quality 0.1V1057 Cyg 21:35–22:00: quality 0.4V1057 Cyg 22:00–22:15: quality 0.3V1057 Cyg 22:15–23:00: quality 0.7V1057 Cyg 23:00–00:00: quality 0.8V1057 Cyg 00:00–01:00: quality 0.6observe V1057 Cyg 22:30–23:25M33M33 23:30–23:40: quality 0.3M33 23:40–23:55: quality 0.4M33 23:55–00:00: quality 0.5M33 00:00–00:15: quality 0.4M33 00:15–01:00: quality 0.5observe M33 00:20–01:00scheduleNGC 7000V1057 CygM31M3322:0000:0002:0004:0006:00

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
20:20–21:35 — nothing worth pointing at — 1.25
21:35–22:30 NGC 7000 0.92 0.47
22:30–23:25 V1057 Cyg 0.92 0.73
23:25–00:20 M31 0.92 0.62
00:20–01:00 M33 0.67 0.52
01:00–06:30 — nothing worth pointing at — 5.5

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 100 25 23:00–00:00 (good) 89.7° at 04:35 122.4° 0.92
M42 Great Orion Nebula 0 0 — 42.9° at 09:25 75.8° 0.0
M45 Seven Sisters 57 0 — 72.5° at 07:40 97.4° 0.0
NGC 7000 North America Nebula 100 31 22:15–01:00 (good) 87.2° at 00:50 123.1° 0.92
V1057 Cyg 100 31 22:15–01:00 (good) 87.3° at 00:50 123.2° 0.92
M33 Triangulum Pinwheel 100 14 23:30–01:00 (marginal) 79.1° at 05:25 122.0° 0.67

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2026-08-13"

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"}.