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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 Monday, 20 January 2048 · astronomical night 18:58 → 06:05 (11.12 h) · Moon 31% (waxing crescent) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 17:55–18:30: quality 0.1M31 18:30–19:00: quality 0.4M31 19:00–21:20: quality 0.8M31 21:20–22:55: quality 0.7M31 22:55–23:05: quality 0.6M31 23:05–23:10: quality 0.7M31 23:10–23:25: quality 0.6M31 23:25–23:40: quality 0.5M31 23:40–23:50: quality 0.4observe M31 22:45–23:40M42M42 18:15–18:30: quality 0.1M42 18:30–18:40: quality 0.2M42 18:40–19:00: quality 0.3M42 19:00–19:05: quality 0.6M42 19:05–20:05: quality 0.7M42 20:05–23:05: quality 0.8M42 23:05–23:45: quality 0.9M42 23:45–00:55: quality 0.8M42 00:55–01:10: quality 0.7M42 01:10–01:25: quality 0.6M42 01:25–01:40: quality 0.5M42 01:40–01:50: quality 0.4observe M42 23:40–01:50M45M45 17:55–18:30: quality 0.1M45 18:30–19:00: quality 0.4M45 19:00–20:25: quality 0.8M45 20:25–22:55: quality 0.9M45 22:55–23:05: quality 0.8M45 23:05–00:15: quality 0.9M45 00:15–01:00: quality 0.8M45 01:00–01:15: quality 0.7M45 01:15–01:30: quality 0.6M45 01:30–01:45: quality 0.5M45 01:45–01:50: quality 0.4observe M45 20:15–21:30NGC 7000NGC 7000 17:55–18:30: quality 0.1NGC 7000 18:30–18:35: quality 0.4NGC 7000 18:35–19:00: quality 0.3NGC 7000 19:00–19:15: quality 0.7NGC 7000 19:15–19:35: quality 0.6NGC 7000 19:35–19:55: quality 0.5NGC 7000 19:55–20:15: quality 0.4NGC 7000 20:15–20:20: quality 0.3NGC 7000 06:30–06:40: quality 0.2NGC 7000 06:40–07:15: quality 0.1observe NGC 7000 18:30–19:45V1057 CygV1057 Cyg 17:55–18:30: quality 0.1V1057 Cyg 18:30–18:35: quality 0.4V1057 Cyg 18:35–19:00: quality 0.3V1057 Cyg 19:00–19:15: quality 0.7V1057 Cyg 19:15–19:35: quality 0.6V1057 Cyg 19:35–19:55: quality 0.5V1057 Cyg 19:55–20:15: quality 0.4V1057 Cyg 20:15–20:20: quality 0.3V1057 Cyg 06:30–06:40: quality 0.2V1057 Cyg 06:40–07:15: quality 0.1observe V1057 Cyg 19:45–20:15M33M33 17:55–18:30: quality 0.1M33 18:30–19:00: quality 0.4M33 19:00–21:50: quality 0.8M33 21:50–23:05: quality 0.7M33 23:05–23:10: quality 0.8M33 23:10–23:25: quality 0.7M33 23:25–23:40: quality 0.6M33 23:40–23:55: quality 0.5M33 23:55–00:00: quality 0.4observe M33 21:30–22:45scheduleNGC 7000M45M33M31M4218:0020:0022:0000:0002:0004:0006:00

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
17:20–18:30 — nothing worth pointing at — 1.17
18:30–19:45 NGC 7000 1.25 0.5
19:45–20:15 V1057 Cyg 0.5 0.43
20:15–21:30 M45 1.25 0.86
21:30–22:45 M33 1.25 0.74
22:45–23:40 M31 0.92 0.59
23:40–01:50 M42 2.17 0.71
01:50–07:45 — nothing worth pointing at — 5.92

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 76 unknown 19:00–23:15 (good) 89.5° at 17:10 33.4° 0.92
M42 Great Orion Nebula 87 unknown 19:00–01:20 (good) 42.9° at 22:00 79.1° 2.17
M45 Seven Sisters 93 unknown 19:00–01:20 (good) 72.6° at 20:10 51.1° 1.25
NGC 7000 North America Nebula 17 unknown 19:00–19:25 (good) 87.2° at 13:25 57.0° 1.25
V1057 Cyg 17 unknown 19:00–19:25 (good) 87.2° at 13:25 56.9° 0.5
M33 Triangulum Pinwheel 80 unknown 19:00–23:30 (good) 79.2° at 18:00 28.0° 1.25
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2048-01-20"

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"}.