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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, 25 December 2026 · astronomical night 18:36 → 06:06 (11.5 h) · Moon 95% (waning gibbous) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 17:30–18:05: quality 0.2M31 18:05–18:40: quality 0.5M31 18:40–18:45: quality 1.0M31 18:45–21:25: quality 0.8M31 21:25–22:45: quality 0.7M31 22:45–00:20: quality 0.6M31 00:20–00:45: quality 0.5M31 00:45–01:10: quality 0.4M31 01:10–01:30: quality 0.3observe M31 21:05–22:35M42M42 19:55–20:25: quality 0.3M42 20:25–00:40: quality 0.4M42 00:40–02:50: quality 0.3M42 02:50–03:30: quality 0.2observe M42 01:35–02:25M45M45 17:30–18:05: quality 0.1M45 18:05–18:35: quality 0.4M45 18:35–18:40: quality 0.5M45 18:40–18:45: quality 0.9M45 18:45–20:20: quality 0.7M45 20:20–22:35: quality 0.6M45 22:35–00:50: quality 0.5M45 00:50–02:45: quality 0.4M45 02:45–03:10: quality 0.3M45 03:10–03:30: quality 0.2observe M45 00:05–01:35observe M45 02:25–02:55NGC 7000NGC 7000 17:30–17:50: quality 0.2NGC 7000 17:50–18:05: quality 0.1NGC 7000 18:05–18:40: quality 0.5NGC 7000 18:40–18:45: quality 0.9NGC 7000 18:45–20:00: quality 0.8NGC 7000 20:00–21:00: quality 0.7NGC 7000 21:00–21:20: quality 0.6NGC 7000 21:20–21:35: quality 0.5NGC 7000 21:35–21:55: quality 0.4NGC 7000 21:55–22:00: quality 0.3observe NGC 7000 19:35–21:05V1057 CygV1057 Cyg 17:30–17:50: quality 0.2V1057 Cyg 17:50–18:05: quality 0.1V1057 Cyg 18:05–18:40: quality 0.5V1057 Cyg 18:40–18:45: quality 0.9V1057 Cyg 18:45–20:00: quality 0.8V1057 Cyg 20:00–21:00: quality 0.7V1057 Cyg 21:00–21:15: quality 0.6V1057 Cyg 21:15–21:35: quality 0.5V1057 Cyg 21:35–21:55: quality 0.4V1057 Cyg 21:55–22:00: quality 0.3observe V1057 Cyg 18:05–19:35M33M33 17:30–18:05: quality 0.2M33 18:05–18:40: quality 0.5M33 18:40–18:45: quality 1.0M33 18:45–20:45: quality 0.8M33 20:45–22:45: quality 0.7M33 22:45–00:15: quality 0.6M33 00:15–01:00: quality 0.5M33 01:00–01:20: quality 0.4M33 01:20–01:40: quality 0.3observe M33 22:35–00:05scheduleV1057 CygNGC 7000M31M33M45M4218:0020:0022:0000:0002:0004:0006:00

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
18:05–19:35 V1057 Cyg 1.5 0.69
19:35–21:05 NGC 7000 1.5 0.72
21:05–22:35 M31 1.5 0.72
22:35–00:05 M33 1.5 0.61
00:05–01:35 M45 1.5 0.45
01:35–02:25 M42 0.83 0.31
02:25–02:55 M45 0.5 0.35
02:55–07:50 — nothing worth pointing at — 4.92

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 100 unknown 18:40–23:30 (good) 89.6° at 18:50 91.4° 1.5
M42 Great Orion Nebula 30 unknown 20:10–02:25 (marginal) 42.9° at 23:40 47.3° 0.83
M45 Seven Sisters 91 unknown 18:40–21:25 (good) 72.5° at 21:50 60.9° 2.0
NGC 7000 North America Nebula 62 unknown 18:40–21:10 (good) 87.3° at 15:05 113.0° 1.5
V1057 Cyg 62 unknown 18:40–21:10 (good) 87.3° at 15:05 113.1° 1.5
M33 Triangulum Pinwheel 100 unknown 18:40–23:30 (good) 79.1° at 19:40 87.0° 1.5
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2026-12-25"

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"}.