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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 Tuesday, 12 August 2025 · astronomical night 22:11 → 04:40 (6.48 h) · Moon 84% (waning gibbous) · weather: ERA5 history

M31M31 22:00–22:05: quality 0.2M31 22:05–22:10: quality 0.1M31 22:10–22:15: quality 0.2M31 22:15–22:20: quality 0.3M31 22:20–22:50: quality 0.4M31 22:50–03:00: quality 0.5M31 03:00–04:45: quality 0.4M31 04:45–05:25: quality 0.2M31 05:25–06:00: quality 0.1observe M31 00:35–02:05M42M45M45 02:10–02:15: quality 0.2M45 02:15–02:45: quality 0.3M45 02:45–04:00: quality 0.4M45 04:00–04:45: quality 0.5M45 04:45–05:15: quality 0.2M45 05:15–05:25: quality 0.3M45 05:25–06:00: quality 0.1observe M45 03:35–04:45NGC 7000NGC 7000 21:00–21:35: quality 0.1NGC 7000 21:35–22:05: quality 0.5NGC 7000 22:05–22:15: quality 0.4NGC 7000 22:15–00:20: quality 0.7NGC 7000 00:20–03:50: quality 0.6NGC 7000 03:50–04:45: quality 0.5NGC 7000 04:45–05:10: quality 0.3NGC 7000 05:10–05:25: quality 0.2NGC 7000 05:25–06:00: quality 0.1observe NGC 7000 21:35–23:05V1057 CygV1057 Cyg 21:00–21:35: quality 0.1V1057 Cyg 21:35–22:05: quality 0.5V1057 Cyg 22:05–22:15: quality 0.4V1057 Cyg 22:15–00:20: quality 0.7V1057 Cyg 00:20–03:50: quality 0.6V1057 Cyg 03:50–04:45: quality 0.5V1057 Cyg 04:45–05:10: quality 0.3V1057 Cyg 05:10–05:25: quality 0.2V1057 Cyg 05:25–06:00: quality 0.1observe V1057 Cyg 23:05–00:35M33M33 23:35–23:40: quality 0.2M33 23:40–00:10: quality 0.3M33 00:10–04:45: quality 0.4M33 04:45–05:25: quality 0.2M33 05:25–06:00: quality 0.1observe M33 02:05–03:35scheduleNGC 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
20:20–21:35 — nothing worth pointing at — 1.25
21:35–23:05 NGC 7000 1.5 0.6
23:05–00:35 V1057 Cyg 1.5 0.67
00:35–02:05 M31 1.5 0.48
02:05–03:35 M33 1.5 0.41
03:35–04:45 M45 1.17 0.46
04:45–06:30 — nothing worth pointing at — 1.75

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 40 40 22:15–04:45 (marginal) 89.6° at 04:40 37.2° 1.5
M42 Great Orion Nebula 0 0 — 42.9° at 09:30 78.6° 0.0
M45 Seven Sisters 15 15 02:30–04:45 (marginal) 72.5° at 07:40 52.8° 1.17
NGC 7000 North America Nebula 74 74 22:15–01:40 (good) 87.3° at 00:55 59.9° 1.5
V1057 Cyg 74 74 22:15–01:40 (good) 87.3° at 00:55 59.9° 1.5
M33 Triangulum Pinwheel 23 23 23:55–04:45 (marginal) 79.1° at 05:30 31.2° 1.5

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2025-08-12"

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"}.