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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 Tuesday, 17 December 2030 · astronomical night 18:32 → 06:02 (11.5 h) · Moon 51% (last quarter) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 17:25–18:00: quality 0.2M31 18:00–18:35: quality 0.5M31 18:35–22:45: quality 1.0M31 22:45–00:10: quality 0.9M31 00:10–01:00: quality 0.8M31 01:00–01:15: quality 0.7M31 01:15–01:30: quality 0.6M31 01:30–01:50: quality 0.5M31 01:50–02:00: quality 0.4observe M31 19:45–21:30M42M42 20:25–20:35: quality 0.4M42 20:35–20:50: quality 0.5M42 20:50–21:05: quality 0.6M42 21:05–21:20: quality 0.7M42 21:20–22:30: quality 0.8M42 22:30–00:25: quality 0.9M42 00:25–01:50: quality 0.8M42 01:50–03:05: quality 0.7M42 03:05–03:25: quality 0.6M42 03:25–03:40: quality 0.5M42 03:40–04:00: quality 0.4observe M42 01:45–04:00M45M45 17:25–18:00: quality 0.1M45 18:00–18:35: quality 0.4M45 18:35–19:45: quality 0.9M45 19:45–00:25: quality 1.0M45 00:25–01:45: quality 0.9M45 01:45–03:00: quality 0.8M45 03:00–03:20: quality 0.7M45 03:20–03:35: quality 0.6M45 03:35–03:50: quality 0.5M45 03:50–04:00: quality 0.4observe M45 00:00–01:45NGC 7000NGC 7000 17:25–18:00: quality 0.2NGC 7000 18:00–18:35: quality 0.5NGC 7000 18:35–19:05: quality 1.0NGC 7000 19:05–20:35: quality 0.9NGC 7000 20:35–21:30: quality 0.8NGC 7000 21:30–21:50: quality 0.7NGC 7000 21:50–22:05: quality 0.6NGC 7000 22:05–22:20: quality 0.5NGC 7000 22:20–22:30: quality 0.4observe NGC 7000 18:00–19:45V1057 CygV1057 Cyg 17:25–18:00: quality 0.2V1057 Cyg 18:00–18:35: quality 0.5V1057 Cyg 18:35–19:05: quality 1.0V1057 Cyg 19:05–20:35: quality 0.9V1057 Cyg 20:35–21:30: quality 0.8V1057 Cyg 21:30–21:45: quality 0.7V1057 Cyg 21:45–22:05: quality 0.6V1057 Cyg 22:05–22:20: quality 0.5V1057 Cyg 22:20–22:30: quality 0.4observe V1057 Cyg 21:30–22:15M33M33 17:25–17:55: quality 0.1M33 17:55–18:00: quality 0.2M33 18:00–18:35: quality 0.5M33 18:35–23:15: quality 1.0M33 23:15–00:25: quality 0.9M33 00:25–01:15: quality 0.8M33 01:15–01:30: quality 0.7M33 01:30–01:45: quality 0.6M33 01:45–02:00: quality 0.5M33 02:00–02:10: quality 0.4observe M33 22:15–00:00scheduleNGC 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
16:50–18:00 — nothing worth pointing at — 1.17
18:00–19:45 NGC 7000 1.75 0.8
19:45–21:30 M31 1.75 1.0
21:30–22:15 V1057 Cyg 0.75 0.62
22:15–00:00 M33 1.75 0.96
00:00–01:45 M45 1.75 0.92
01:45–04:00 M42 2.25 0.63
04:00–07:45 — nothing worth pointing at — 3.75

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 100 unknown 18:35–01:25 (good) 89.7° at 19:20 138.4° 1.75
M42 Great Orion Nebula 89 unknown 20:55–03:15 (good) 42.9° at 00:10 89.5° 2.25
M45 Seven Sisters 100 unknown 18:35–03:30 (good) 72.5° at 22:25 115.6° 1.75
NGC 7000 North America Nebula 87 unknown 18:35–21:55 (good) 87.2° at 15:35 126.1° 1.75
V1057 Cyg 87 unknown 18:35–21:55 (good) 87.3° at 15:35 126.2° 0.75
M33 Triangulum Pinwheel 100 unknown 18:35–01:40 (good) 79.1° at 20:10 140.2° 1.75
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2030-12-17"

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"}.