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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 Wednesday, 20 December 2028 · astronomical night 18:33 → 06:04 (11.51 h) · Moon 23% (waxing crescent) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 17:25–18:05: quality 0.1M31 18:05–18:35: quality 0.5M31 18:35–21:30: quality 0.9M31 21:30–22:30: quality 1.0M31 22:30–00:00: quality 0.9M31 00:00–00:50: quality 0.8M31 00:50–01:05: quality 0.7M31 01:05–01:25: quality 0.6M31 01:25–01:40: quality 0.5M31 01:40–01:50: quality 0.4observe M31 22:00–23:40M42M42 20:15–20:20: quality 0.4M42 20:20–20:40: quality 0.5M42 20:40–20:55: quality 0.6M42 20:55–21:10: quality 0.7M42 21:10–22:20: quality 0.8M42 22:20–01:40: quality 0.9M42 01:40–02:50: quality 0.8M42 02:50–03:10: quality 0.7M42 03:10–03:25: quality 0.6M42 03:25–03:40: quality 0.5M42 03:40–03:50: quality 0.4observe M42 01:20–03:50M45M45 17:25–18:05: quality 0.1M45 18:05–18:35: quality 0.4M45 18:35–18:55: quality 0.8M45 18:55–20:15: quality 0.9M45 20:15–00:50: quality 1.0M45 00:50–02:15: quality 0.9M45 02:15–03:00: quality 0.8M45 03:00–03:15: quality 0.7M45 03:15–03:25: quality 0.6M45 03:25–03:40: quality 0.5M45 03:40–03:50: quality 0.4observe M45 23:40–01:20NGC 7000NGC 7000 17:25–18:05: quality 0.1NGC 7000 18:05–18:35: quality 0.4NGC 7000 18:35–18:55: quality 0.9NGC 7000 18:55–20:55: quality 0.8NGC 7000 20:55–21:25: quality 0.7NGC 7000 21:25–21:30: quality 0.6NGC 7000 21:30–21:35: quality 0.7NGC 7000 21:35–21:50: quality 0.6NGC 7000 21:50–22:10: quality 0.5NGC 7000 22:10–22:15: quality 0.4observe NGC 7000 18:05–19:45V1057 CygV1057 Cyg 17:25–18:05: quality 0.1V1057 Cyg 18:05–18:35: quality 0.4V1057 Cyg 18:35–18:55: quality 0.9V1057 Cyg 18:55–20:55: quality 0.8V1057 Cyg 20:55–21:25: quality 0.7V1057 Cyg 21:25–21:30: quality 0.6V1057 Cyg 21:30–21:35: quality 0.7V1057 Cyg 21:35–21:50: quality 0.6V1057 Cyg 21:50–22:10: quality 0.5V1057 Cyg 22:10–22:15: quality 0.4observe V1057 Cyg 21:25–22:00M33M33 17:25–18:05: quality 0.1M33 18:05–18:35: quality 0.5M33 18:35–21:30: quality 0.9M33 21:30–23:00: quality 1.0M33 23:00–00:20: quality 0.9M33 00:20–01:10: quality 0.8M33 01:10–01:20: quality 0.7M33 01:20–01:35: quality 0.6M33 01:35–01:50: quality 0.5M33 01:50–02:00: quality 0.4observe M33 19:45–21:25scheduleNGC 7000M33M31M45M4218:0020:0022:0000:0002:0004:0006:00

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
16:50–18:05 — nothing worth pointing at — 1.25
18:05–19:45 NGC 7000 1.67 0.72
19:45–21:25 M33 1.67 0.93
21:25–22:00 V1057 Cyg 0.58 0.59
22:00–23:40 M31 1.67 0.93
23:40–01:20 M45 1.67 0.97
01:20–03:50 M42 2.5 0.73
03:50–07:45 — nothing worth pointing at — 3.92

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 100 unknown 18:35–01:15 (good) 89.7° at 19:05 63.9° 1.67
M42 Great Orion Nebula 89 unknown 20:45–03:15 (good) 42.9° at 00:00 114.5° 2.5
M45 Seven Sisters 100 unknown 18:35–03:20 (good) 72.5° at 22:10 92.5° 1.67
NGC 7000 North America Nebula 65 unknown 18:35–21:40 (good) 87.2° at 15:20 54.8° 1.67
V1057 Cyg 65 unknown 18:35–21:40 (good) 87.3° at 15:20 54.7° 0.58
M33 Triangulum Pinwheel 100 unknown 18:35–01:30 (good) 79.1° at 19:55 66.4° 1.67
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2028-12-20"

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"}.