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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, 20 January 2040 · astronomical night 18:58 → 06:05 (11.12 h) · Moon 48% (first quarter) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 17:55–18:30: quality 0.1M31 18:30–19:00: quality 0.3M31 19:00–20:55: quality 0.7M31 20:55–22:55: quality 0.6M31 22:55–23:20: quality 0.5M31 23:20–23:40: quality 0.4M31 23:40–23:50: quality 0.3observe M31 22:50–23:40M42M42 18:20–18:30: quality 0.1M42 18:30–19:00: quality 0.2M42 19:00–19:10: quality 0.5M42 19:10–20:35: quality 0.6M42 20:35–00:40: quality 0.7M42 00:40–00:55: 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 0.3M45 19:00–00:40: quality 0.7M45 00:40–01:00: quality 0.8M45 01:00–01:15: quality 0.7M45 01:15–01:30: quality 0.6M45 01:30–01:40: quality 0.5M45 01:40–01:50: quality 0.4observe M45 21:35–22:50NGC 7000NGC 7000 17:55–18:30: quality 0.1NGC 7000 18:30–19:00: quality 0.3NGC 7000 19:00–19:25: quality 0.6NGC 7000 19:25–19:50: quality 0.5NGC 7000 19:50–20:10: quality 0.4NGC 7000 20:10–20:20: 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 18:30–19:00: quality 0.3V1057 Cyg 19:00–19:25: quality 0.6V1057 Cyg 19:25–19:50: quality 0.5V1057 Cyg 19:50–20:10: quality 0.4V1057 Cyg 20:10–20:20: quality 0.3V1057 Cyg 06:30–06:40: quality 0.2V1057 Cyg 06:40–07:15: quality 0.1observe V1057 Cyg 19:45–20:20M33M33 17:55–18:30: quality 0.1M33 18:30–19:00: quality 0.3M33 19:00–21:10: quality 0.7M33 21:10–23:15: quality 0.6M33 23:15–23:35: quality 0.5M33 23:35–23:55: quality 0.4M33 23:55–00:00: quality 0.3observe M33 20:20–21:35scheduleNGC 7000M33M45M31M4218:0020:0022:0000:0002:0004:0006:00

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 0.47
19:45–20:20 V1057 Cyg 0.58 0.39
20:20–21:35 M33 1.25 0.66
21:35–22:50 M45 1.25 0.72
22:50–23:40 M31 0.83 0.47
23:40–01:50 M42 2.17 0.65
01:50–07:45 — nothing worth pointing at — 5.92

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 54 unknown 19:00–22:45 (good) 89.5° at 17:05 36.9° 0.83
M42 Great Orion Nebula 80 unknown 19:30–01:20 (good) 42.9° at 22:00 57.3° 2.17
M45 Seven Sisters 82 unknown 19:00–01:20 (good) 72.5° at 20:10 32.0° 1.25
NGC 7000 North America Nebula 15 unknown 19:00–19:15 (good) 87.2° at 13:25 72.6° 1.25
V1057 Cyg 15 unknown 19:00–19:15 (good) 87.3° at 13:25 72.6° 0.58
M33 Triangulum Pinwheel 55 unknown 19:00–23:00 (good) 79.2° at 18:00 23.3° 1.25
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2040-01-20"

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"}.