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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 Sunday, 21 December 2031 · astronomical night 18:34 → 06:04 (11.51 h) · Moon 60% (waxing gibbous) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 17:30–18:05: quality 0.1M31 18:05–18:35: quality 0.3M31 18:35–00:50: quality 0.6M31 00:50–01:15: quality 0.5M31 01:15–01:25: quality 0.4M31 01:25–01:40: quality 0.5M31 01:40–01:45: quality 0.4observe M31 00:45–01:25M42M42 20:10–20:20: quality 0.3M42 20:20–20:40: quality 0.4M42 20:40–21:05: quality 0.5M42 21:05–22:05: quality 0.6M42 22:05–01:25: quality 0.7M42 01:25–01:40: 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 03:40–03:45: quality 0.4observe M42 23:05–00:45M45M45 17:30–18:05: quality 0.1M45 18:05–18:35: quality 0.3M45 18:35–20:35: quality 0.6M45 20:35–00:05: quality 0.7M45 00:05–00:15: quality 0.8M45 00:15–01:25: quality 0.7M45 01:25–02:10: quality 0.9M45 02:10–03:00: quality 0.8M45 03:00–03:15: quality 0.7M45 03:15–03:25: quality 0.6M45 03:25–03:40: quality 0.5M45 03:40–03:45: quality 0.4observe M45 21:25–23:05observe M45 01:55–03:45NGC 7000NGC 7000 17:30–18:05: quality 0.1NGC 7000 18:05–18:35: quality 0.3NGC 7000 18:35–18:50: quality 0.7NGC 7000 18:50–21:10: quality 0.6NGC 7000 21:10–21:35: quality 0.5NGC 7000 21:35–22:00: quality 0.4NGC 7000 22:00–22:15: quality 0.3observe NGC 7000 18:05–19:45V1057 CygV1057 Cyg 17:30–18:05: quality 0.1V1057 Cyg 18:05–18:35: quality 0.3V1057 Cyg 18:35–18:50: quality 0.7V1057 Cyg 18:50–21:10: quality 0.6V1057 Cyg 21:10–21:35: quality 0.5V1057 Cyg 21:35–22:00: quality 0.4V1057 Cyg 22:00–22:15: quality 0.3observe V1057 Cyg 19:45–21:25M33M33 17:30–18:05: quality 0.1M33 18:05–18:35: quality 0.3M33 18:35–01:10: quality 0.6M33 01:10–01:25: quality 0.5M33 01:25–01:35: quality 0.6M33 01:35–01:50: quality 0.5M33 01:50–01:55: quality 0.4observe M33 01:25–01:55scheduleNGC 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
16:50–18:05 — nothing worth pointing at — 1.25
18:05–19:45 NGC 7000 1.67 0.54
19:45–21:25 V1057 Cyg 1.67 0.57
21:25–23:05 M45 1.67 0.69
23:05–00:45 M42 1.67 0.72
00:45–01:25 M31 0.67 0.49
01:25–01:55 M33 0.5 0.52
01:55–03:45 M45 1.83 0.73
03:45–07:45 — nothing worth pointing at — 4.0

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 63 unknown 20:45–00:00 (good) 89.7° at 19:05 33.9° 0.67
M42 Great Orion Nebula 86 unknown 21:15–03:15 (good) 42.9° at 23:55 75.4° 1.67
M45 Seven Sisters 91 unknown 19:25–03:20 (good) 72.5° at 22:10 48.2° 3.5
NGC 7000 North America Nebula 37 unknown 18:35–20:00 (good) 87.2° at 15:20 60.0° 1.67
V1057 Cyg 37 unknown 18:35–20:00 (good) 87.3° at 15:20 59.9° 1.67
M33 Triangulum Pinwheel 63 unknown 21:20–00:40 (good) 79.1° at 19:55 26.8° 0.5
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2031-12-21"

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"}.