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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, 15 December 2037 · astronomical night 18:31 → 06:01 (11.49 h) · Moon 62% (waxing gibbous) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 17:25–18:00: quality 0.1M31 18:00–18:35: quality 0.3M31 18:35–21:40: quality 0.6M31 21:40–23:00: quality 0.7M31 23:00–01:15: quality 0.6M31 01:15–01:30: quality 0.7M31 01:30–01:45: quality 0.6M31 01:45–02:00: quality 0.5M31 02:00–02:10: quality 0.4observe M31 01:00–01:45M42M42 20:35–20:45: quality 0.3M42 20:45–21:05: quality 0.4M42 21:05–21:25: quality 0.5M42 21:25–22:25: quality 0.6M42 22:25–01:15: quality 0.7M42 01:15–02:05: quality 0.9M42 02:05–03:15: quality 0.8M42 03:15–03:30: quality 0.7M42 03:30–03:45: quality 0.6M42 03:45–04:00: quality 0.5M42 04:00–04:10: quality 0.4observe M42 23:15–01:00M45M45 17:25–18:00: quality 0.1M45 18:00–18:35: quality 0.3M45 18:35–20:20: quality 0.6M45 20:20–23:55: quality 0.7M45 23:55–01:15: quality 0.8M45 01:15–02:35: quality 0.9M45 02:35–03:20: quality 0.8M45 03:20–03:35: quality 0.7M45 03:35–03:50: quality 0.6M45 03:50–04:00: quality 0.5M45 04:00–04:10: quality 0.4observe M45 21:30–23:15observe M45 02:20–04:10NGC 7000NGC 7000 17:25–18:00: quality 0.1NGC 7000 18:00–18:35: quality 0.4NGC 7000 18:35–19:50: quality 0.7NGC 7000 19:50–21:40: quality 0.6NGC 7000 21:40–22:00: quality 0.5NGC 7000 22:00–22:25: quality 0.4NGC 7000 22:25–22:40: quality 0.3observe NGC 7000 18:00–19:45V1057 CygV1057 Cyg 17:25–18:00: quality 0.1V1057 Cyg 18:00–18:35: quality 0.4V1057 Cyg 18:35–19:50: quality 0.7V1057 Cyg 19:50–21:40: quality 0.6V1057 Cyg 21:40–22:00: quality 0.5V1057 Cyg 22:00–22:25: quality 0.4V1057 Cyg 22:25–22:40: quality 0.3observe V1057 Cyg 19:45–21:30M33M33 17:25–18:00: quality 0.1M33 18:00–18:35: quality 0.3M33 18:35–22:35: quality 0.6M33 22:35–22:55: quality 0.7M33 22:55–01:15: quality 0.6M33 01:15–01:30: quality 0.8M33 01:30–01:45: quality 0.7M33 01:45–02:00: quality 0.6M33 02:00–02:10: quality 0.5M33 02:10–02:20: quality 0.4observe M33 01:45–02:20scheduleNGC 7000V1057 CygM45M42M4518:0020:0022:0000:0002:0004:0006:00

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 0.57
19:45–21:30 V1057 Cyg 1.75 0.62
21:30–23:15 M45 1.75 0.7
23:15–01:00 M42 1.75 0.72
01:00–01:45 M31 0.75 0.62
01:45–02:20 M33 0.58 0.52
02:20–04:10 M45 1.83 0.71
04:10–07:45 — nothing worth pointing at — 3.58

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 71 unknown 18:35–01:10 (good) 89.6° at 19:25 42.6° 0.75
M42 Great Orion Nebula 87 unknown 21:35–03:40 (good) 42.9° at 00:20 73.9° 1.75
M45 Seven Sisters 94 unknown 19:25–03:40 (good) 72.5° at 22:30 52.0° 3.58
NGC 7000 North America Nebula 47 unknown 18:35–21:05 (good) 87.2° at 15:45 66.9° 1.75
V1057 Cyg 47 unknown 18:35–21:05 (good) 87.3° at 15:45 66.8° 1.75
M33 Triangulum Pinwheel 81 unknown 20:35–01:50 (good) 79.2° at 20:20 34.5° 0.58
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2037-12-15"

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"}.