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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, 27 January 2031 · astronomical night 19:06 → 06:01 (10.92 h) · Moon 27% (waxing crescent) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 18:00–18:35: quality 0.1M31 18:35–19:10: quality 0.4M31 19:10–21:20: quality 0.8M31 21:20–22:25: quality 0.7M31 22:25–22:55: quality 0.6M31 22:55–23:10: quality 0.5M31 23:10–23:20: quality 0.4observe M31 20:55–22:05M42M42 18:00–18:35: quality 0.1M42 18:35–18:45: quality 0.3M42 18:45–19:10: quality 0.4M42 19:10–19:25: quality 0.7M42 19:25–22:45: quality 0.8M42 22:45–23:15: quality 0.9M42 23:15–00:25: quality 0.8M42 00:25–00:40: quality 0.7M42 00:40–00:55: quality 0.6M42 00:55–01:15: quality 0.5M42 01:15–01:20: quality 0.4observe M42 22:05–01:20M45M45 18:00–18:35: quality 0.1M45 18:35–19:10: quality 0.4M45 19:10–22:35: quality 0.9M45 22:35–22:45: quality 0.8M45 22:45–23:45: quality 0.9M45 23:45–00:35: quality 0.8M45 00:35–00:45: quality 0.7M45 00:45–01:00: quality 0.6M45 01:00–01:15: quality 0.5M45 01:15–01:20: quality 0.4observe M45 18:35–19:45NGC 7000NGC 7000 18:00–18:35: quality 0.1NGC 7000 18:35–19:10: quality 0.3NGC 7000 19:10–19:30: quality 0.5NGC 7000 19:30–19:50: quality 0.4NGC 7000 06:00–06:05: quality 0.4NGC 7000 06:05–06:20: quality 0.2NGC 7000 06:20–06:35: quality 0.3NGC 7000 06:35–07:10: quality 0.1observe NGC 7000 06:00–06:05V1057 CygV1057 Cyg 18:00–18:35: quality 0.1V1057 Cyg 18:35–19:10: quality 0.3V1057 Cyg 19:10–19:30: quality 0.5V1057 Cyg 19:30–19:50: quality 0.4V1057 Cyg 06:00–06:05: quality 0.4V1057 Cyg 06:05–06:20: quality 0.2V1057 Cyg 06:20–06:35: quality 0.3V1057 Cyg 06:35–07:10: quality 0.1M33M33 18:00–18:35: quality 0.1M33 18:35–19:10: quality 0.4M33 19:10–21:45: quality 0.8M33 21:45–22:55: quality 0.7M33 22:55–23:10: quality 0.6M33 23:10–23:25: quality 0.5M33 23:25–23:30: quality 0.4observe M33 19:45–20:55scheduleM45M33M31M4218:0020:0022:0000:0002:0004:0006:00

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
17:25–18:35 — nothing worth pointing at — 1.17
18:35–19:45 M45 1.17 0.64
19:45–20:55 M33 1.17 0.82
20:55–22:05 M31 1.17 0.74
22:05–01:20 M42 3.25 0.76
01:20–06:00 — nothing worth pointing at — 4.67
06:00–06:05 NGC 7000 0.08 0.41
06:05–07:40 — nothing worth pointing at — 1.58

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 69 unknown 19:10–22:35 (good) 89.7° at 16:40 33.5° 1.17
M42 Great Orion Nebula 87 unknown 19:10–00:50 (good) 42.9° at 21:30 77.1° 3.25
M45 Seven Sisters 92 unknown 19:10–00:55 (good) 72.5° at 19:40 49.4° 1.17
NGC 7000 North America Nebula 10 unknown 19:10–19:50 (marginal) 87.2° at 12:55 58.5° 0.08
V1057 Cyg 10 unknown 19:10–19:50 (marginal) 87.3° at 12:55 58.5° 0.0
M33 Triangulum Pinwheel 74 unknown 19:10–23:00 (good) 79.1° at 17:30 27.1° 1.17

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2031-01-27"

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"}.