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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 Wednesday, 26 August 2026 · astronomical night 21:44 → 05:01 (7.27 h) · Moon 98% (full moon) · weather: ERA5 history

M31M31 21:10–21:35: quality 0.1M31 21:35–21:45: quality 0.2M31 21:45–21:50: quality 0.3M31 21:50–22:10: quality 0.4M31 22:10–00:00: quality 0.5M31 00:00–02:45: quality 0.6M31 02:45–03:00: quality 0.7M31 03:00–03:50: quality 0.6M31 03:50–05:05: quality 0.7M31 05:05–05:35: quality 0.4M31 05:35–05:40: quality 0.5M31 05:40–06:00: quality 0.1M31 06:00–06:15: quality 0.2observe M31 00:25–01:45M42M42 04:50–05:05: quality 0.4M42 05:05–05:15: quality 0.2M42 05:15–05:40: quality 0.3M42 05:40–06:15: quality 0.1observe M42 04:50–05:05observe M42 05:35–05:40M45M45 01:15–01:20: quality 0.3M45 01:20–01:40: quality 0.4M45 01:40–01:55: quality 0.5M45 01:55–02:35: quality 0.6M45 02:35–04:00: quality 0.7M45 04:00–05:05: quality 0.8M45 05:05–05:35: quality 0.4M45 05:35–05:40: quality 0.5M45 05:40–06:00: quality 0.1M45 06:00–06:15: quality 0.2observe M45 03:05–04:50observe M45 05:05–05:35NGC 7000NGC 7000 20:35–21:10: quality 0.1NGC 7000 21:10–21:45: quality 0.2NGC 7000 21:45–00:00: quality 0.5NGC 7000 00:00–05:05: quality 0.6NGC 7000 05:05–05:35: quality 0.3NGC 7000 05:35–05:40: quality 0.4NGC 7000 05:40–06:15: quality 0.1observe NGC 7000 21:45–23:05V1057 CygV1057 Cyg 20:35–21:10: quality 0.1V1057 Cyg 21:10–21:45: quality 0.2V1057 Cyg 21:45–00:00: quality 0.5V1057 Cyg 00:00–05:05: quality 0.6V1057 Cyg 05:05–05:35: quality 0.3V1057 Cyg 05:35–05:40: quality 0.4V1057 Cyg 05:40–06:15: quality 0.1observe V1057 Cyg 23:05–00:25M33M33 22:40–22:45: quality 0.2M33 22:45–23:05: quality 0.3M33 23:05–23:30: quality 0.4M33 23:30–00:35: quality 0.5M33 00:35–02:15: quality 0.6M33 02:15–03:00: quality 0.7M33 03:00–03:30: quality 0.6M33 03:30–05:05: quality 0.7M33 05:05–05:35: quality 0.4M33 05:35–05:40: quality 0.5M33 05:40–06:00: quality 0.1M33 06:00–06:15: quality 0.2observe M33 01:45–03:05scheduleNGC 7000V1057 CygM31M33M4522:0000:0002:0004:0006:00

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
20:00–21:45 — nothing worth pointing at — 1.75
21:45–23:05 NGC 7000 1.33 0.51
23:05–00:25 V1057 Cyg 1.33 0.54
00:25–01:45 M31 1.33 0.61
01:45–03:05 M33 1.33 0.65
03:05–04:50 M45 1.75 0.74
04:50–05:05 M42 0.25 0.4
05:05–05:35 M45 0.5 0.41
05:35–05:40 M42 0.08 0.34
05:40–06:45 — nothing worth pointing at — 1.08

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 73 69 00:45–05:05 (good) 89.7° at 03:45 72.9° 1.33
M42 Great Orion Nebula 4 4 04:50–05:05 (marginal) 42.9° at 08:35 118.7° 0.33
M45 Seven Sisters 61 60 02:05–05:05 (good) 72.5° at 06:45 100.7° 2.25
NGC 7000 North America Nebula 61 58 21:45–05:05 (marginal) 87.3° at 00:00 60.7° 1.33
V1057 Cyg 61 58 21:45–05:05 (marginal) 87.3° at 00:00 60.6° 1.33
M33 Triangulum Pinwheel 74 72 01:25–05:05 (good) 79.1° at 04:35 75.4° 1.33
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2026-08-26"

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"}.