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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, 20 January 2030 · astronomical night 18:58 → 06:05 (11.11 h) · Moon 98% (full moon) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 17:55–18:30: quality 0.2M31 18:30–18:40: quality 0.5M31 18:40–19:00: quality 0.4M31 19:00–19:50: quality 0.9M31 19:50–21:05: quality 0.8M31 21:05–22:30: quality 0.7M31 22:30–23:00: quality 0.6M31 23:00–23:20: quality 0.5M31 23:20–23:40: quality 0.4M31 23:40–23:45: quality 0.3observe M31 18:30–19:40M42M42 18:10–18:30: quality 0.1M42 18:30–18:40: quality 0.3M42 18:40–19:00: quality 0.2M42 19:00–22:20: quality 0.5M42 22:20–00:45: quality 0.4M42 00:45–01:20: quality 0.3M42 01:20–01:45: quality 0.2observe M42 22:30–23:40M45M45 17:55–18:15: quality 0.1M45 18:15–18:30: quality 0.2M45 18:30–18:40: quality 0.5M45 18:40–19:00: quality 0.4M45 19:00–19:10: quality 0.8M45 19:10–21:40: quality 0.7M45 21:40–23:20: quality 0.6M45 23:20–00:55: quality 0.5M45 00:55–01:20: quality 0.4M45 01:20–01:40: quality 0.3M45 01:40–01:45: quality 0.2observe M45 21:20–22:30observe M45 23:55–01:30NGC 7000NGC 7000 17:55–18:30: quality 0.1NGC 7000 18:30–19:00: quality 0.4NGC 7000 19:00–19:20: quality 0.7NGC 7000 19:20–19:40: quality 0.6NGC 7000 19:40–20:00: quality 0.5NGC 7000 20:00–20:15: quality 0.4NGC 7000 06:25–06:40: quality 0.2NGC 7000 06:40–07:15: quality 0.1observe NGC 7000 19:40–20:10V1057 CygV1057 Cyg 17:55–18:30: quality 0.1V1057 Cyg 18:30–19:00: quality 0.4V1057 Cyg 19:00–19:20: quality 0.7V1057 Cyg 19:20–19:40: quality 0.6V1057 Cyg 19:40–20:00: quality 0.5V1057 Cyg 20:00–20:15: quality 0.4V1057 Cyg 06:30–06:40: quality 0.2V1057 Cyg 06:40–07:15: quality 0.1M33M33 17:55–18:30: quality 0.2M33 18:30–18:40: quality 0.5M33 18:40–19:00: quality 0.4M33 19:00–19:15: quality 0.9M33 19:15–21:10: quality 0.8M33 21:10–22:30: quality 0.7M33 22:30–23:10: quality 0.6M33 23:10–23:30: quality 0.5M33 23:30–23:50: quality 0.4M33 23:50–23:55: quality 0.3observe M33 20:10–21:20observe M33 23:40–23:55scheduleM31M33M45M42M4518:0020:0022:0000:0002:0004:0006:00

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
18:30–19:40 M31 1.17 0.69
19:40–20:10 NGC 7000 0.5 0.47
20:10–21:20 M33 1.17 0.79
21:20–22:30 M45 1.17 0.64
22:30–23:40 M42 1.17 0.42
23:40–23:55 M33 0.25 0.35
23:55–01:30 M45 1.58 0.44
01:30–07:45 — nothing worth pointing at — 6.25

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 79 unknown 19:00–22:50 (good) 89.7° at 17:05 107.7° 1.17
M42 Great Orion Nebula 41 unknown 19:00–01:05 (marginal) 42.9° at 21:55 56.3° 1.17
M45 Seven Sisters 75 unknown 19:00–22:35 (good) 72.5° at 20:10 77.0° 2.75
NGC 7000 North America Nebula 20 unknown 19:00–19:30 (good) 87.2° at 13:20 123.5° 0.5
V1057 Cyg 19 unknown 19:00–19:30 (good) 87.3° at 13:20 123.6° 0.0
M33 Triangulum Pinwheel 80 unknown 19:00–23:05 (good) 79.1° at 17:55 103.7° 1.42

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2030-01-20"

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"}.