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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 Friday, 18 January 2041 · astronomical night 18:57 → 06:05 (11.15 h) · Moon 97% (full moon) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 17:50–18:25: quality 0.2M31 18:25–19:00: quality 0.4M31 19:00–20:55: quality 0.8M31 20:55–22:15: quality 0.7M31 22:15–23:00: quality 0.6M31 23:00–23:20: quality 0.5M31 23:20–23:45: quality 0.4M31 23:45–23:55: quality 0.3observe M31 21:30–22:45M42M42 18:20–18:25: quality 0.1M42 18:25–19:00: quality 0.2M42 19:00–23:00: quality 0.5M42 23:00–01:00: quality 0.4M42 01:00–01:35: quality 0.3M42 01:35–01:55: quality 0.2observe M42 00:00–01:15M45M45 17:50–18:20: quality 0.1M45 18:20–18:25: quality 0.2M45 18:25–19:00: quality 0.4M45 19:00–21:35: quality 0.7M45 21:35–23:20: quality 0.6M45 23:20–01:00: quality 0.5M45 01:00–01:25: quality 0.4M45 01:25–01:50: quality 0.3M45 01:50–01:55: quality 0.2observe M45 22:45–00:00observe M45 01:15–01:35NGC 7000NGC 7000 17:50–18:25: quality 0.1NGC 7000 18:25–19:00: quality 0.4NGC 7000 19:00–19:25: quality 0.7NGC 7000 19:25–19:45: quality 0.6NGC 7000 19:45–20:05: quality 0.5NGC 7000 20:05–20:25: quality 0.4NGC 7000 06:35–06:40: quality 0.2NGC 7000 06:40–07:15: quality 0.1observe NGC 7000 19:40–20:15V1057 CygV1057 Cyg 17:50–18:25: quality 0.1V1057 Cyg 18:25–19:00: quality 0.4V1057 Cyg 19:00–19:25: quality 0.7V1057 Cyg 19:25–19:45: quality 0.6V1057 Cyg 19:45–20:05: quality 0.5V1057 Cyg 20:05–20:25: quality 0.4V1057 Cyg 06:35–06:40: quality 0.2V1057 Cyg 06:40–07:15: quality 0.1observe V1057 Cyg 18:25–19:40M33M33 17:50–18:25: quality 0.2M33 18:25–19:00: quality 0.4M33 19:00–21:05: quality 0.8M33 21:05–22:25: quality 0.7M33 22:25–23:15: quality 0.6M33 23:15–23:35: quality 0.5M33 23:35–23:55: quality 0.4M33 23:55–00:05: quality 0.3observe M33 20:15–21:30scheduleV1057 CygM33M31M45M4218:0020:0022:0000:0002:0004:0006:00

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
17:15–18:25 — nothing worth pointing at — 1.17
18:25–19:40 V1057 Cyg 1.25 0.53
19:40–20:15 NGC 7000 0.58 0.48
20:15–21:30 M33 1.25 0.77
21:30–22:45 M31 1.25 0.66
22:45–00:00 M45 1.25 0.55
00:00–01:15 M42 1.25 0.37
01:15–01:35 M45 0.33 0.35
01:35–07:45 — nothing worth pointing at — 6.17

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 78 unknown 19:00–22:50 (good) 89.5° at 17:10 103.0° 1.25
M42 Great Orion Nebula 43 unknown 19:00–01:15 (marginal) 42.9° at 22:05 61.9° 1.25
M45 Seven Sisters 75 unknown 19:00–22:40 (good) 72.5° at 20:15 77.0° 1.58
NGC 7000 North America Nebula 21 unknown 19:00–19:35 (good) 87.2° at 13:30 114.9° 0.58
V1057 Cyg 21 unknown 19:00–19:35 (good) 87.3° at 13:30 115.0° 1.25
M33 Triangulum Pinwheel 81 unknown 19:00–23:05 (good) 79.2° at 18:05 101.2° 1.25
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2041-01-18"

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"}.