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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, 30 December 2031 · astronomical night 18:39 → 06:07 (11.47 h) · Moon 96% (waning gibbous) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 17:35–18:10: quality 0.2M31 18:10–18:40: quality 0.5M31 18:40–19:05: quality 1.0M31 19:05–21:40: quality 0.8M31 21:40–23:00: quality 0.7M31 23:00–00:15: quality 0.6M31 00:15–00:35: quality 0.5M31 00:35–00:55: quality 0.4M31 00:55–01:10: quality 0.3observe M31 21:10–22:40M42M42 19:35–20:05: quality 0.3M42 20:05–20:40: quality 0.4M42 20:40–21:00: quality 0.5M42 21:00–00:20: quality 0.4M42 00:20–02:30: quality 0.3M42 02:30–03:10: quality 0.2observe M42 01:40–02:05M45M45 17:35–18:10: quality 0.1M45 18:10–18:15: quality 0.4M45 18:15–18:40: quality 0.5M45 18:40–18:55: quality 0.9M45 18:55–19:05: quality 1.0M45 19:05–20:45: quality 0.7M45 20:45–23:10: quality 0.6M45 23:10–01:00: quality 0.5M45 01:00–02:30: quality 0.4M45 02:30–03:00: quality 0.3M45 03:00–03:10: quality 0.2observe M45 00:10–01:40observe M45 02:05–02:45NGC 7000NGC 7000 17:35–18:10: quality 0.1NGC 7000 18:10–18:40: quality 0.5NGC 7000 18:40–19:05: quality 0.9NGC 7000 19:05–20:10: quality 0.8NGC 7000 20:10–20:45: quality 0.7NGC 7000 20:45–21:05: quality 0.6NGC 7000 21:05–21:20: quality 0.5NGC 7000 21:20–21:40: quality 0.4observe NGC 7000 19:40–21:10V1057 CygV1057 Cyg 17:35–18:10: quality 0.1V1057 Cyg 18:10–18:40: quality 0.5V1057 Cyg 18:40–19:05: quality 0.9V1057 Cyg 19:05–20:10: quality 0.8V1057 Cyg 20:10–20:45: quality 0.7V1057 Cyg 20:45–21:05: quality 0.6V1057 Cyg 21:05–21:20: quality 0.5V1057 Cyg 21:20–21:40: quality 0.4observe V1057 Cyg 18:10–19:40M33M33 17:35–18:10: quality 0.2M33 18:10–18:40: quality 0.5M33 18:40–19:05: quality 1.0M33 19:05–21:30: quality 0.8M33 21:30–22:55: quality 0.7M33 22:55–00:25: quality 0.6M33 00:25–00:45: quality 0.5M33 00:45–01:05: quality 0.4M33 01:05–01:20: quality 0.3observe M33 22:40–00:10scheduleV1057 CygNGC 7000M31M33M4518:0020:0022:0000:0002:0004:0006:00

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
16:55–18:10 — nothing worth pointing at — 1.25
18:10–19:40 V1057 Cyg 1.5 0.72
19:40–21:10 NGC 7000 1.5 0.7
21:10–22:40 M31 1.5 0.73
22:40–00:10 M33 1.5 0.61
00:10–01:40 M45 1.5 0.46
01:40–02:05 M42 0.42 0.3
02:05–02:45 M45 0.67 0.36
02:45–07:50 — nothing worth pointing at — 5.08

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 100 unknown 18:40–23:45 (good) 89.7° at 18:30 97.1° 1.5
M42 Great Orion Nebula 31 unknown 19:50–02:05 (marginal) 42.9° at 23:20 44.8° 0.42
M45 Seven Sisters 96 unknown 18:40–21:50 (good) 72.5° at 21:35 63.9° 2.17
NGC 7000 North America Nebula 56 unknown 18:40–20:55 (good) 87.2° at 14:45 120.2° 1.5
V1057 Cyg 56 unknown 18:40–20:55 (good) 87.3° at 14:45 120.3° 1.5
M33 Triangulum Pinwheel 100 unknown 18:40–23:35 (good) 79.1° at 19:20 91.5° 1.5
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2031-12-30"

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"}.