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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 Sunday, 14 December 2025 · astronomical night 18:31 → 06:00 (11.49 h) · Moon 22% (waning crescent) · weather: ERA5 history

M31M31 17:25–18:00: quality 0.2M31 18:00–18:35: quality 0.5M31 18:35–22:00: quality 1.0M31 22:00–22:25: quality 0.6M31 22:25–23:00: quality 0.5M31 02:00–02:05: quality 0.5M31 02:05–02:10: quality 0.4observe M31 20:30–21:45M42M42 20:35–20:45: quality 0.4M42 20:45–21:00: quality 0.5M42 21:00–21:15: quality 0.6M42 21:15–21:35: quality 0.7M42 21:35–22:00: quality 0.8M42 22:00–23:00: quality 0.5M42 02:00–03:15: quality 0.8M42 03:15–03:30: quality 0.7M42 03:30–03:45: quality 0.6M42 03:45–04:05: quality 0.5M42 04:05–04:10: quality 0.4observe M42 03:15–04:10M45M45 17:25–18:00: quality 0.1M45 18:00–18:35: quality 0.4M45 18:35–19:55: quality 0.9M45 19:55–22:00: quality 1.0M45 22:00–23:00: quality 0.6M45 02:00–02:30: quality 0.9M45 02:30–03:25: quality 0.8M45 03:25–03:35: quality 0.7M45 03:35–03:50: quality 0.6M45 03:50–04:05: quality 0.5M45 04:05–04:10: quality 0.4observe M45 02:00–03:15NGC 7000NGC 7000 17:25–18:00: quality 0.2NGC 7000 18:00–18:35: quality 0.5NGC 7000 18:35–19:15: quality 1.0NGC 7000 19:15–20:45: quality 0.9NGC 7000 20:45–21:40: quality 0.8NGC 7000 21:40–22:00: quality 0.7NGC 7000 22:00–22:35: quality 0.3NGC 7000 22:35–22:40: quality 0.2observe NGC 7000 18:00–19:15V1057 CygV1057 Cyg 17:25–18:00: quality 0.2V1057 Cyg 18:00–18:35: quality 0.5V1057 Cyg 18:35–19:15: quality 1.0V1057 Cyg 19:15–20:45: quality 0.9V1057 Cyg 20:45–21:40: quality 0.8V1057 Cyg 21:40–22:00: quality 0.7V1057 Cyg 22:00–22:35: quality 0.3V1057 Cyg 22:35–22:40: quality 0.2observe V1057 Cyg 19:15–20:30M33M33 17:25–18:00: quality 0.1M33 18:00–18:35: quality 0.5M33 18:35–22:00: quality 1.0M33 22:00–22:50: quality 0.6M33 22:50–23:00: quality 0.5M33 02:00–02:15: quality 0.5M33 02:15–02:25: quality 0.4observe M33 21:45–23:00scheduleNGC 7000V1057 CygM31M33M45M4218:0020:0022:0000:0002:0004:0006:00

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
16:50–18:00 — nothing worth pointing at — 1.17
18:00–19:15 NGC 7000 1.25 0.75
19:15–20:30 V1057 Cyg 1.25 0.91
20:30–21:45 M31 1.25 1.0
21:45–23:00 M33 1.25 0.64
23:00–02:00 — nothing worth pointing at — 3.0
02:00–03:15 M45 1.25 0.84
03:15–04:10 M42 0.92 0.58
04:10–07:45 — nothing worth pointing at — 3.58

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 100 61 18:35–22:00 (good) 89.7° at 19:30 150.2° 1.25
M42 Great Orion Nebula 89 44 02:00–03:40 (good) 42.9° at 00:20 117.6° 0.92
M45 Seven Sisters 100 63 18:35–22:00 (good) 72.5° at 22:35 147.5° 1.25
NGC 7000 North America Nebula 93 89 18:35–22:00 (good) 87.2° at 15:45 114.3° 1.25
V1057 Cyg 93 89 18:35–22:00 (good) 87.3° at 15:45 114.4° 1.25
M33 Triangulum Pinwheel 100 60 18:35–22:00 (good) 79.1° at 20:20 163.1° 1.25
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2025-12-14"

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"}.