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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, 11 August 2025 · astronomical night 22:13 → 04:39 (6.43 h) · Moon 92% (waning gibbous) · weather: ERA5 history

M31M31 22:05–22:15: quality 0.1M31 22:15–22:30: quality 0.3M31 22:30–23:00: quality 0.4M31 23:00–04:40: quality 0.5M31 04:40–05:20: quality 0.2M31 05:20–06:00: quality 0.1observe M31 00:25–01:50M42M42 05:55–06:00: quality 0.1M45M45 02:10–02:15: quality 0.2M45 02:15–02:40: quality 0.3M45 02:40–03:05: quality 0.4M45 03:05–04:40: quality 0.5M45 04:40–05:20: quality 0.3M45 05:20–06:00: quality 0.1observe M45 03:15–04:40NGC 7000NGC 7000 21:00–21:35: quality 0.1NGC 7000 21:35–21:45: quality 0.5NGC 7000 21:45–22:15: quality 0.3NGC 7000 22:15–23:15: quality 0.7NGC 7000 23:15–01:50: quality 0.6NGC 7000 01:50–04:40: quality 0.5NGC 7000 04:40–05:20: quality 0.2NGC 7000 05:20–06:00: quality 0.1observe NGC 7000 21:35–23:00V1057 CygV1057 Cyg 21:00–21:35: quality 0.1V1057 Cyg 21:35–21:45: quality 0.5V1057 Cyg 21:45–22:15: quality 0.3V1057 Cyg 22:15–23:10: quality 0.7V1057 Cyg 23:10–01:50: quality 0.6V1057 Cyg 01:50–04:40: quality 0.5V1057 Cyg 04:40–05:20: quality 0.2V1057 Cyg 05:20–06:00: quality 0.1observe V1057 Cyg 23:00–00:25M33M33 23:35–23:45: quality 0.2M33 23:45–00:15: quality 0.3M33 00:15–04:15: quality 0.4M33 04:15–04:40: quality 0.5M33 04:40–05:20: quality 0.2M33 05:20–06:00: quality 0.1observe M33 01:50–03:15scheduleNGC 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
20:25–21:35 — nothing worth pointing at — 1.17
21:35–23:00 NGC 7000 1.42 0.54
23:00–00:25 V1057 Cyg 1.42 0.63
00:25–01:50 M31 1.42 0.48
01:50–03:15 M33 1.42 0.43
03:15–04:40 M45 1.42 0.5
04:40–06:30 — nothing worth pointing at — 1.83

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 39 39 22:15–04:40 (marginal) 89.5° at 04:40 46.5° 1.42
M42 Great Orion Nebula 0 0 — 42.9° at 09:35 90.3° 0.0
M45 Seven Sisters 18 18 02:30–04:40 (marginal) 72.5° at 07:45 66.9° 1.42
NGC 7000 North America Nebula 70 70 22:15–00:20 (good) 87.2° at 01:00 58.1° 1.42
V1057 Cyg 70 70 22:15–00:20 (good) 87.3° at 01:00 58.0° 1.42
M33 Triangulum Pinwheel 26 26 00:00–04:40 (marginal) 79.1° at 05:35 43.8° 1.42

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2025-08-11"

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"}.