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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 May 2026 · astronomical night 22:25 → 04:09 (5.74 h) · Moon 20% (waning crescent) · weather: ERA5 history

M31M31 04:05–04:10: quality 0.4M31 04:10–04:30: quality 0.2M31 04:30–04:55: quality 0.3M31 04:55–05:35: quality 0.1observe M31 04:05–04:10observe M31 04:45–04:55M42M45NGC 7000NGC 7000 00:05–00:20: quality 0.4NGC 7000 00:20–00:35: quality 0.5NGC 7000 00:35–00:55: quality 0.6NGC 7000 00:55–01:40: quality 0.7NGC 7000 01:40–02:40: quality 0.8NGC 7000 02:40–04:10: quality 0.9NGC 7000 04:10–04:55: quality 0.5NGC 7000 04:55–05:35: quality 0.1observe NGC 7000 00:05–01:45observe NGC 7000 04:10–04:45V1057 CygV1057 Cyg 00:10–00:20: quality 0.4V1057 Cyg 00:20–00:35: quality 0.5V1057 Cyg 00:35–00:55: quality 0.6V1057 Cyg 00:55–01:40: quality 0.7V1057 Cyg 01:40–02:40: quality 0.8V1057 Cyg 02:40–04:10: quality 0.9V1057 Cyg 04:10–04:55: quality 0.5V1057 Cyg 04:55–05:35: quality 0.1observe V1057 Cyg 01:45–04:05M33scheduleNGC 7000V1057 CygNGC 700022:0000:0002:0004:0006:00

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
20:30–00:05 — nothing worth pointing at — 3.58
00:05–01:45 NGC 7000 1.67 0.62
01:45–04:05 V1057 Cyg 2.33 0.87
04:05–04:10 M31 0.08 0.39
04:10–04:45 NGC 7000 0.58 0.47
04:45–04:55 M31 0.17 0.31
04:55–06:05 — nothing worth pointing at — 1.17

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 3 3 04:45–04:55 (marginal) 89.7° at 10:40 41.4° 0.25
M42 Great Orion Nebula 0 0 — 42.9° at 15:35 85.7° 0.0
M45 Seven Sisters 0 0 — 72.5° at 13:50 60.7° 0.0
NGC 7000 North America Nebula 91 87 00:45–04:10 (good) 87.2° at 06:55 57.6° 2.25
V1057 Cyg 90 86 00:45–04:10 (good) 87.3° at 06:55 57.6° 2.33
M33 Triangulum Pinwheel 0 0 — 79.1° at 11:30 37.8° 0.0

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2026-05-12"

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"}.