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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, 28 July 2026 · astronomical night 22:38 → 04:16 (5.63 h) · Moon 100% (full moon) · weather: ERA5 history

M31M31 23:00–23:15: quality 0.3M31 23:15–23:40: quality 0.4M31 23:40–00:00: quality 0.5M31 00:00–02:10: quality 0.6M31 02:10–03:00: quality 0.7M31 03:00–03:05: quality 0.6M31 03:05–04:00: quality 0.7M31 04:00–04:20: quality 0.6M31 04:20–05:00: quality 0.3M31 05:00–05:05: quality 0.4M31 05:05–05:45: quality 0.1observe M31 01:20–02:40M42M45M45 03:10–03:15: quality 0.3M45 03:15–03:35: quality 0.4M45 03:35–03:50: quality 0.5M45 03:50–04:20: quality 0.6M45 04:20–05:00: quality 0.3M45 05:00–05:05: quality 0.4M45 05:05–05:45: quality 0.1observe M45 04:00–04:20observe M45 04:50–05:05NGC 7000NGC 7000 21:20–21:55: quality 0.1NGC 7000 21:55–22:40: quality 0.3NGC 7000 22:40–04:00: quality 0.6NGC 7000 04:00–04:20: quality 0.5NGC 7000 04:20–05:05: quality 0.3NGC 7000 05:05–05:45: quality 0.1observe NGC 7000 22:40–00:00V1057 CygV1057 Cyg 21:20–21:55: quality 0.1V1057 Cyg 21:55–22:40: quality 0.3V1057 Cyg 22:40–04:00: quality 0.6V1057 Cyg 04:00–04:20: quality 0.5V1057 Cyg 04:20–05:05: quality 0.3V1057 Cyg 05:05–05:45: quality 0.1observe V1057 Cyg 00:00–01:20M33M33 00:35–00:45: quality 0.3M33 00:45–01:05: quality 0.4M33 01:05–01:25: quality 0.5M33 01:25–02:55: quality 0.6M33 02:55–03:00: quality 0.7M33 03:00–03:40: quality 0.6M33 03:40–04:00: quality 0.7M33 04:00–04:20: quality 0.6M33 04:20–05:00: quality 0.3M33 05:00–05:05: quality 0.4M33 05:05–05:45: quality 0.1observe M33 02:40–04:00observe M33 04:20–04:50scheduleNGC 7000V1057 CygM31M3322:0000:0002:0004:0006:00

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
20:40–22:40 — nothing worth pointing at — 2.0
22:40–00:00 NGC 7000 1.33 0.6
00:00–01:20 V1057 Cyg 1.33 0.61
01:20–02:40 M31 1.33 0.64
02:40–04:00 M33 1.33 0.64
04:00–04:20 M45 0.33 0.57
04:20–04:50 M33 0.5 0.31
04:50–05:05 M45 0.25 0.33
05:05–06:15 — nothing worth pointing at — 1.17

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 75 67 01:15–04:20 (good) 89.6° at 05:40 91.1° 1.33
M42 Great Orion Nebula 0 0 — 42.9° at 10:30 133.8° 0.0
M45 Seven Sisters 20 17 03:10–04:20 (marginal) 72.5° at 08:40 121.6° 0.58
NGC 7000 North America Nebula 69 62 23:00–01:00 (good) 87.3° at 01:55 68.7° 1.33
V1057 Cyg 69 62 23:00–01:00 (good) 87.3° at 01:55 68.6° 1.33
M33 Triangulum Pinwheel 57 50 02:05–04:20 (good) 79.1° at 06:30 95.6° 1.83

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2026-07-28"

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"}.