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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, 09 July 2026 · astronomical night 23:03 → 03:49 (4.76 h) · Moon 27% (waning crescent) · weather: ERA5 history

M31M31 00:15–00:30: quality 0.4M31 00:30–00:45: quality 0.5M31 00:45–01:00: quality 0.6M31 01:00–01:20: quality 0.7M31 01:20–01:45: quality 0.8M31 01:45–03:50: quality 0.7M31 03:50–04:40: quality 0.4M31 04:40–05:25: quality 0.1observe M31 01:35–03:15M42M45M45 04:25–04:40: quality 0.2M45 04:40–05:25: quality 0.1NGC 7000NGC 7000 21:35–22:15: quality 0.1NGC 7000 22:15–22:35: quality 0.3NGC 7000 22:35–23:05: quality 0.4NGC 7000 23:05–00:00: quality 0.8NGC 7000 00:00–01:00: quality 0.9NGC 7000 01:00–01:45: quality 1.0NGC 7000 01:45–03:00: quality 0.9NGC 7000 03:00–03:50: quality 0.8NGC 7000 03:50–04:40: quality 0.4NGC 7000 04:40–05:25: quality 0.1observe NGC 7000 22:15–23:55V1057 CygV1057 Cyg 21:35–22:15: quality 0.1V1057 Cyg 22:15–22:40: quality 0.3V1057 Cyg 22:40–23:05: quality 0.4V1057 Cyg 23:05–00:00: quality 0.8V1057 Cyg 00:00–01:00: quality 0.9V1057 Cyg 01:00–01:45: quality 1.0V1057 Cyg 01:45–03:00: quality 0.9V1057 Cyg 03:00–03:50: quality 0.8V1057 Cyg 03:50–04:40: quality 0.4V1057 Cyg 04:40–05:25: quality 0.1observe V1057 Cyg 23:55–01:35M33M33 01:50–02:10: quality 0.4M33 02:10–02:25: quality 0.5M33 02:25–02:45: quality 0.6M33 02:45–03:00: quality 0.7M33 03:00–03:50: quality 0.6M33 03:50–04:00: quality 0.3M33 04:00–04:40: quality 0.4M33 04:40–05:25: quality 0.1observe M33 03:15–04:40scheduleNGC 7000V1057 CygM31M3322:0000:0002:0004:00

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
20:55–22:15 — nothing worth pointing at — 1.33
22:15–23:55 NGC 7000 1.67 0.58
23:55–01:35 V1057 Cyg 1.67 0.94
01:35–03:15 M31 1.67 0.72
03:15–04:40 M33 1.42 0.47
04:40–06:00 — nothing worth pointing at — 1.33

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 63 58 00:55–03:50 (good) 89.5° at 06:55 32.7° 1.67
M42 Great Orion Nebula 0 0 — 42.9° at 11:45 49.5° 0.0
M45 Seven Sisters 1 1 — 72.5° at 09:55 14.4° 0.0
NGC 7000 North America Nebula 100 91 23:05–03:50 (good) 87.3° at 03:10 73.0° 1.67
V1057 Cyg 100 91 23:05–03:50 (good) 87.3° at 03:10 73.0° 1.67
M33 Triangulum Pinwheel 31 28 02:35–03:50 (good) 79.1° at 07:45 18.6° 1.42

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2026-07-09"

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"}.