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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 Tuesday, 26 August 2025 · astronomical night 21:44 → 05:01 (7.29 h) · Moon 13% (waxing crescent) · weather: ERA5 history

M31M31 01:00–02:00: quality 0.8M31 02:00–05:05: quality 1.0M31 05:05–05:40: quality 0.5M31 05:40–06:15: quality 0.2observe M31 01:50–02:40M42M42 04:50–04:55: quality 0.4M42 04:55–05:05: quality 0.5M42 05:05–05:35: quality 0.3M42 05:35–05:40: quality 0.4M42 05:40–06:15: quality 0.1observe M42 05:20–05:40M45M45 01:15–01:30: quality 0.4M45 01:30–01:50: quality 0.5M45 01:50–02:00: quality 0.6M45 02:00–02:55: quality 0.8M45 02:55–04:10: quality 0.9M45 04:10–05:05: quality 1.0M45 05:05–05:40: quality 0.5M45 05:40–06:15: quality 0.2observe M45 04:20–05:20NGC 7000NGC 7000 01:00–02:00: quality 0.8NGC 7000 02:00–03:30: quality 1.0NGC 7000 03:30–05:00: quality 0.9NGC 7000 05:00–05:05: quality 0.8NGC 7000 05:05–05:40: quality 0.4NGC 7000 05:40–06:15: quality 0.1observe NGC 7000 01:00–01:50V1057 CygV1057 Cyg 01:00–02:00: quality 0.8V1057 Cyg 02:00–03:30: quality 1.0V1057 Cyg 03:30–05:00: quality 0.9V1057 Cyg 05:00–05:05: quality 0.8V1057 Cyg 05:05–05:40: quality 0.4V1057 Cyg 05:40–06:15: quality 0.1observe V1057 Cyg 02:40–03:30M33M33 01:00–02:00: quality 0.8M33 02:00–05:05: quality 1.0M33 05:05–05:40: quality 0.5M33 05:40–06:15: quality 0.2observe M33 03:30–04:20scheduleNGC 7000M31V1057 CygM33M4522:0000:0002:0004:0006:00

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
20:00–01:00 — nothing worth pointing at — 5.0
01:00–01:50 NGC 7000 0.83 0.83
01:50–02:40 M31 0.83 0.96
02:40–03:30 V1057 Cyg 0.83 0.97
03:30–04:20 M33 0.83 1.0
04:20–05:20 M45 1.0 0.87
05:20–05:40 M42 0.33 0.33
05:40–06:45 — nothing worth pointing at — 1.08

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 100 57 01:00–05:05 (good) 89.6° at 03:45 147.3° 0.83
M42 Great Orion Nebula 4 4 04:50–05:05 (marginal) 42.9° at 08:35 109.1° 0.33
M45 Seven Sisters 90 88 01:55–05:05 (good) 72.5° at 06:45 136.7° 1.0
NGC 7000 North America Nebula 100 51 01:00–05:05 (good) 87.3° at 00:00 117.7° 0.83
V1057 Cyg 100 51 01:00–05:05 (good) 87.3° at 00:00 117.8° 0.83
M33 Triangulum Pinwheel 100 69 01:00–05:05 (good) 79.1° at 04:35 156.4° 0.83
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2025-08-26"

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"}.