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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 Thursday, 27 August 2026 · astronomical night 21:42 → 05:02 (7.33 h) · Moon 100% (full moon) · weather: ERA5 history

M31M31 21:10–21:20: quality 0.1M31 21:20–21:45: quality 0.2M31 21:45–22:05: quality 0.4M31 22:05–03:00: quality 0.5M31 03:00–05:05: quality 0.6M31 05:05–05:40: quality 0.3M31 05:40–06:15: quality 0.1observe M31 00:25–01:45M42M42 04:45–04:50: quality 0.3M42 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 04:45–05:05observe M42 05:35–05:40M45M45 01:10–01:25: quality 0.3M45 01:25–01:45: quality 0.4M45 01:45–02:45: quality 0.5M45 02:45–03:45: quality 0.6M45 03:45–05:00: quality 0.7M45 05:00–05:05: quality 0.8M45 05:05–05:40: quality 0.4M45 05:40–06:15: quality 0.1observe M45 03:05–04:45observe M45 05:05–05:35NGC 7000NGC 7000 20:35–21:10: quality 0.1NGC 7000 21:10–21:45: quality 0.3NGC 7000 21:45–21:55: quality 0.6NGC 7000 21:55–22:00: quality 0.5NGC 7000 22:00–22:15: quality 0.6NGC 7000 22:15–23:00: quality 0.5NGC 7000 23:00–23:10: quality 0.6NGC 7000 23:10–05:05: quality 0.5NGC 7000 05:05–05:40: quality 0.3NGC 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 0.3V1057 Cyg 21:45–21:55: quality 0.6V1057 Cyg 21:55–22:00: quality 0.5V1057 Cyg 22:00–22:15: quality 0.6V1057 Cyg 22:15–23:00: quality 0.5V1057 Cyg 23:00–23:10: quality 0.6V1057 Cyg 23:10–05:05: quality 0.5V1057 Cyg 05:05–05:40: quality 0.3V1057 Cyg 05:40–06:15: quality 0.1observe V1057 Cyg 23:05–00:25M33M33 22:35–22:40: quality 0.2M33 22:40–23:05: quality 0.3M33 23:05–23:30: quality 0.4M33 23:30–03:00: quality 0.5M33 03:00–05:05: quality 0.6M33 05:05–05:40: quality 0.3M33 05:40–06:15: quality 0.1observe 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 0.54
23:05–00:25 V1057 Cyg 1.33 0.54
00:25–01:45 M31 1.33 0.54
01:45–03:05 M33 1.33 0.52
03:05–04:45 M45 1.67 0.66
04:45–05:05 M42 0.33 0.38
05:05–05:35 M45 0.5 0.38
05:35–05:40 M42 0.08 0.31
05:40–06:45 — nothing worth pointing at — 1.08

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 63 61 04:35–05:05 (good) 89.7° at 03:40 62.1° 1.33
M42 Great Orion Nebula 4 4 04:45–05:05 (marginal) 42.9° at 08:30 108.6° 0.42
M45 Seven Sisters 49 48 03:00–05:05 (good) 72.5° at 06:45 88.0° 2.17
NGC 7000 North America Nebula 60 58 21:45–05:05 (marginal) 87.2° at 23:55 57.7° 1.33
V1057 Cyg 60 58 21:45–05:05 (marginal) 87.3° at 23:55 57.6° 1.33
M33 Triangulum Pinwheel 58 57 04:25–05:05 (good) 79.1° at 04:30 63.2° 1.33
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2026-08-27"

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"}.