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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 Friday, 26 December 2025 · astronomical night 18:37 → 06:06 (11.5 h) · Moon 41% (waxing crescent) · weather: ERA5 history

M31M31 17:30–18:05: quality 0.1M31 18:05–18:40: quality 0.3M31 18:40–20:00: quality 0.6M31 20:00–21:00: quality 0.3M31 21:00–22:00: quality 0.6M31 01:00–01:25: quality 0.1observe M31 18:40–19:20M42M42 19:50–20:00: quality 0.3M42 20:00–20:45: quality 0.2M42 20:45–21:00: quality 0.3M42 21:00–21:50: quality 0.5M42 21:50–22:00: quality 0.6M42 01:00–02:00: quality 0.2M42 02:00–02:45: quality 0.3M42 02:45–03:00: quality 0.2observe M42 21:35–22:00observe M42 02:00–02:20M45M45 17:30–18:05: quality 0.1M45 18:05–18:40: quality 0.3M45 18:40–20:00: quality 0.6M45 20:00–21:00: quality 0.3M45 21:00–22:00: quality 0.6M45 01:00–02:00: quality 0.2M45 02:00–02:50: quality 0.3M45 02:50–03:00: quality 0.2observe M45 20:00–21:00observe M45 02:20–02:30NGC 7000NGC 7000 17:30–18:05: quality 0.1NGC 7000 18:05–18:40: quality 0.3NGC 7000 18:40–19:15: quality 0.6NGC 7000 19:15–20:00: quality 0.5NGC 7000 20:00–20:40: quality 0.3NGC 7000 20:40–21:00: quality 0.2NGC 7000 21:00–21:25: quality 0.4NGC 7000 21:25–21:55: quality 0.3V1057 CygV1057 Cyg 17:30–18:05: quality 0.1V1057 Cyg 18:05–18:40: quality 0.3V1057 Cyg 18:40–19:15: quality 0.6V1057 Cyg 19:15–20:00: quality 0.5V1057 Cyg 20:00–20:40: quality 0.3V1057 Cyg 20:40–21:00: quality 0.2V1057 Cyg 21:00–21:20: quality 0.4V1057 Cyg 21:20–21:50: quality 0.3V1057 Cyg 21:50–21:55: quality 0.2observe V1057 Cyg 18:05–18:10observe V1057 Cyg 21:00–21:35M33M33 17:30–18:05: quality 0.1M33 18:05–18:40: quality 0.3M33 18:40–20:00: quality 0.6M33 20:00–21:00: quality 0.3M33 21:00–22:00: quality 0.6M33 01:00–01:35: quality 0.1observe M33 19:20–20:00scheduleM4518:0020:0022:0000:0002:0004:0006:00

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
16:55–18:05 — nothing worth pointing at — 1.17
18:05–18:10 V1057 Cyg 0.08 0.3
18:10–18:40 — nothing worth pointing at — 0.5
18:40–19:20 M31 0.67 0.59
19:20–20:00 M33 0.67 0.59
20:00–21:00 M45 1.0 0.31
21:00–21:35 V1057 Cyg 0.58 0.37
21:35–22:00 M42 0.42 0.55
22:00–02:00 — nothing worth pointing at — 4.0
02:00–02:20 M42 0.33 0.31
02:20–02:30 M45 0.17 0.3
02:30–07:50 — nothing worth pointing at — 5.33

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 85 31 18:40–20:00 (marginal) 89.6° at 18:45 44.8° 0.67
M42 Great Orion Nebula 89 19 21:00–22:00 (marginal) 42.9° at 23:35 89.2° 0.75
M45 Seven Sisters 100 32 21:00–22:00 (good) 72.5° at 21:45 65.2° 1.17
NGC 7000 North America Nebula 43 28 18:40–20:00 (marginal) 87.3° at 15:00 57.6° 0.0
V1057 Cyg 43 28 18:40–20:00 (marginal) 87.3° at 15:00 57.5° 0.67
M33 Triangulum Pinwheel 88 31 18:40–20:00 (marginal) 79.1° at 19:35 42.0° 0.67

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2025-12-26"

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"}.