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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, 31 January 2031 · astronomical night 19:10 → 05:58 (10.8 h) · Moon 65% (waxing gibbous) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 18:05–18:40: quality 0.1M31 18:40–19:15: quality 0.3M31 19:15–19:25: quality 0.6M31 19:25–22:10: quality 0.5M31 22:10–22:35: quality 0.4M31 22:35–23:05: quality 0.3observe M31 19:15–20:20M42M42 18:05–18:40: quality 0.1M42 18:40–19:15: quality 0.2M42 19:15–19:40: quality 0.4M42 19:40–00:20: quality 0.5M42 00:20–00:45: quality 0.4M42 00:45–01:05: quality 0.3observe M42 22:30–01:00M45M45 18:05–18:40: quality 0.1M45 18:40–19:15: quality 0.2M45 19:15–00:20: quality 0.5M45 00:20–00:45: quality 0.4M45 00:45–01:05: quality 0.3observe M45 21:25–22:30NGC 7000NGC 7000 18:05–18:40: quality 0.1NGC 7000 18:40–18:45: quality 0.3NGC 7000 18:45–19:15: quality 0.2NGC 7000 19:15–19:20: quality 0.4NGC 7000 19:20–19:35: quality 0.3NGC 7000 05:45–05:55: quality 0.4NGC 7000 05:55–06:00: quality 0.5NGC 7000 06:00–06:05: quality 0.2NGC 7000 06:05–06:35: quality 0.3NGC 7000 06:35–07:05: quality 0.1observe NGC 7000 05:45–06:00observe NGC 7000 06:20–06:35V1057 CygV1057 Cyg 18:05–18:40: quality 0.1V1057 Cyg 18:40–18:45: quality 0.3V1057 Cyg 18:45–19:15: quality 0.2V1057 Cyg 19:15–19:20: quality 0.4V1057 Cyg 19:20–19:35: quality 0.3V1057 Cyg 05:45–05:55: quality 0.4V1057 Cyg 05:55–06:00: quality 0.5V1057 Cyg 06:00–06:05: quality 0.2V1057 Cyg 06:05–06:35: quality 0.3V1057 Cyg 06:35–07:05: quality 0.1M33M33 18:05–18:40: quality 0.1M33 18:40–19:15: quality 0.3M33 19:15–21:55: quality 0.5M33 21:55–22:45: quality 0.4M33 22:45–23:10: quality 0.3M33 23:10–23:15: quality 0.2observe M33 20:20–21:25scheduleM31M33M45M4218:0020:0022:0000:0002:0004:0006:00

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
17:30–19:15 — nothing worth pointing at — 1.75
19:15–20:20 M31 1.08 0.54
20:20–21:25 M33 1.08 0.47
21:25–22:30 M45 1.08 0.52
22:30–01:00 M42 2.5 0.47
01:00–05:45 — nothing worth pointing at — 4.75
05:45–06:00 NGC 7000 0.25 0.44
06:00–06:20 — nothing worth pointing at — 0.33
06:20–06:35 NGC 7000 0.25 0.32
06:35–07:35 — nothing worth pointing at — 1.0

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 28 unknown 19:15–22:50 (marginal) 89.6° at 16:25 44.4° 1.08
M42 Great Orion Nebula 37 unknown 19:15–01:00 (marginal) 42.9° at 21:15 36.7° 2.5
M45 Seven Sisters 40 unknown 19:15–00:55 (marginal) 72.5° at 19:25 3.6° 1.08
NGC 7000 North America Nebula 7 unknown 05:45–06:00 (marginal) 87.2° at 12:40 84.3° 0.5
V1057 Cyg 7 unknown 05:45–06:00 (marginal) 87.3° at 12:40 84.3° 0.0
M33 Triangulum Pinwheel 25 unknown 19:15–23:00 (marginal) 79.1° at 17:15 32.0° 1.08

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2031-01-31"

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"}.