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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, 11 December 2026 · astronomical night 18:30 → 05:58 (11.46 h) · Moon 7% (waxing crescent) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 17:25–18:00: quality 0.1M31 18:00–18:35: quality 0.5M31 18:35–23:10: quality 1.0M31 23:10–00:35: quality 0.9M31 00:35–01:30: quality 0.8M31 01:30–01:45: quality 0.7M31 01:45–02:00: quality 0.6M31 02:00–02:15: quality 0.5M31 02:15–02:25: quality 0.4observe M31 21:30–23:15M42M42 20:50–21:00: quality 0.4M42 21:00–21:15: quality 0.5M42 21:15–21:30: quality 0.6M42 21:30–21:45: quality 0.7M42 21:45–22:55: quality 0.8M42 22:55–02:20: quality 0.9M42 02:20–03:30: quality 0.8M42 03:30–03:45: quality 0.7M42 03:45–04:00: quality 0.6M42 04:00–04:20: quality 0.5M42 04:20–04:25: quality 0.4observe M42 02:45–04:25M45M45 17:25–18:00: quality 0.1M45 18:00–18:35: quality 0.4M45 18:35–18:50: quality 0.8M45 18:50–20:10: quality 0.9M45 20:10–01:30: quality 1.0M45 01:30–02:50: quality 0.9M45 02:50–03:35: quality 0.8M45 03:35–03:50: quality 0.7M45 03:50–04:05: quality 0.6M45 04:05–04:20: quality 0.5M45 04:20–04:25: quality 0.4observe M45 01:00–02:45NGC 7000NGC 7000 17:25–18:00: quality 0.1NGC 7000 18:00–18:35: quality 0.5NGC 7000 18:35–19:30: quality 1.0NGC 7000 19:30–21:00: quality 0.9NGC 7000 21:00–21:55: quality 0.8NGC 7000 21:55–22:10: quality 0.7NGC 7000 22:10–22:30: quality 0.6NGC 7000 22:30–22:45: quality 0.5NGC 7000 22:45–22:55: quality 0.4observe NGC 7000 18:00–19:45V1057 CygV1057 Cyg 17:25–18:00: quality 0.1V1057 Cyg 18:00–18:35: quality 0.5V1057 Cyg 18:35–19:30: quality 1.0V1057 Cyg 19:30–21:00: quality 0.9V1057 Cyg 21:00–21:55: quality 0.8V1057 Cyg 21:55–22:10: quality 0.7V1057 Cyg 22:10–22:30: quality 0.6V1057 Cyg 22:30–22:45: quality 0.5V1057 Cyg 22:45–22:55: quality 0.4observe V1057 Cyg 19:45–21:30M33M33 17:25–18:00: quality 0.1M33 18:00–18:35: quality 0.5M33 18:35–23:35: quality 1.0M33 23:35–00:55: quality 0.9M33 00:55–01:45: quality 0.8M33 01:45–02:00: quality 0.7M33 02:00–02:15: quality 0.6M33 02:15–02:30: quality 0.5M33 02:30–02:35: quality 0.4observe M33 23:15–01:00scheduleNGC 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
18:00–19:45 NGC 7000 1.75 0.81
19:45–21:30 V1057 Cyg 1.75 0.87
21:30–23:15 M31 1.75 0.99
23:15–01:00 M33 1.75 0.91
01:00–02:45 M45 1.75 0.92
02:45–04:25 M42 1.67 0.68
04:25–07:40 — nothing worth pointing at — 3.25

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 100 unknown 18:35–01:50 (good) 89.6° at 19:45 97.0° 1.75
M42 Great Orion Nebula 89 unknown 21:20–03:55 (good) 42.9° at 00:35 138.6° 1.67
M45 Seven Sisters 100 unknown 18:35–04:00 (good) 72.5° at 22:45 128.6° 1.75
NGC 7000 North America Nebula 98 unknown 18:35–22:20 (good) 87.3° at 16:00 71.4° 1.75
V1057 Cyg 98 unknown 18:35–22:20 (good) 87.3° at 16:00 71.4° 1.75
M33 Triangulum Pinwheel 100 unknown 18:35–02:05 (good) 79.1° at 20:35 102.2° 1.75
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2026-12-11"

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"}.