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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 Sunday, 19 July 2026 · astronomical night 22:52 → 04:02 (5.18 h) · Moon 35% (waxing crescent) · weather: ERA5 history

M31M31 23:35–23:50: quality 0.4M31 23:50–00:05: quality 0.5M31 00:05–00:20: quality 0.6M31 00:20–00:35: quality 0.7M31 00:35–01:35: quality 0.8M31 01:35–02:55: quality 0.9M31 02:55–03:00: quality 1.0M31 03:00–03:10: quality 0.9M31 03:10–04:05: quality 1.0M31 04:05–04:55: quality 0.5M31 04:55–05:00: quality 0.2M31 05:00–05:35: quality 0.1observe M31 01:00–02:25observe M31 04:05–04:35M42M45M45 03:45–03:50: quality 0.4M45 03:50–04:05: quality 0.5M45 04:05–04:25: quality 0.3M45 04:25–04:55: quality 0.4M45 04:55–05:35: quality 0.1observe M45 03:50–04:05observe M45 04:35–04:55NGC 7000NGC 7000 21:25–22:10: quality 0.1NGC 7000 22:10–22:55: quality 0.4NGC 7000 22:55–23:00: quality 0.8NGC 7000 23:00–00:00: quality 0.9NGC 7000 00:00–04:05: quality 1.0NGC 7000 04:05–04:55: quality 0.5NGC 7000 04:55–05:00: quality 0.2NGC 7000 05:00–05:35: quality 0.1observe NGC 7000 22:10–23:35V1057 CygV1057 Cyg 21:25–22:10: quality 0.1V1057 Cyg 22:10–22:55: quality 0.4V1057 Cyg 22:55–23:00: quality 0.8V1057 Cyg 23:00–00:00: quality 0.9V1057 Cyg 00:00–04:05: quality 1.0V1057 Cyg 04:05–04:55: quality 0.5V1057 Cyg 04:55–05:00: quality 0.2V1057 Cyg 05:00–05:35: quality 0.1observe V1057 Cyg 23:35–01:00M33M33 01:10–01:15: quality 0.4M33 01:15–01:30: quality 0.5M33 01:30–01:45: quality 0.6M33 01:45–02:00: quality 0.7M33 02:00–02:45: quality 0.8M33 02:45–04:05: quality 0.9M33 04:05–04:55: quality 0.5M33 04:55–05:00: quality 0.2M33 05:00–05:35: quality 0.1observe M33 02:25–03:50scheduleNGC 7000V1057 CygM31M33M3122:0000:0002:0004:0006:00

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
20:50–22:10 — nothing worth pointing at — 1.33
22:10–23:35 NGC 7000 1.42 0.63
23:35–01:00 V1057 Cyg 1.42 0.97
01:00–02:25 M31 1.42 0.86
02:25–03:50 M33 1.42 0.86
03:50–04:05 M45 0.25 0.49
04:05–04:35 M31 0.5 0.5
04:35–04:55 M45 0.33 0.4
04:55–06:05 — nothing worth pointing at — 1.17

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 100 99 00:10–04:05 (good) 89.6° at 06:15 145.4° 1.92
M42 Great Orion Nebula 0 0 — 42.9° at 11:05 102.8° 0.0
M45 Seven Sisters 7 7 04:10–04:55 (marginal) 72.5° at 09:15 129.8° 0.58
NGC 7000 North America Nebula 100 98 22:55–04:05 (good) 87.3° at 02:30 120.9° 1.42
V1057 Cyg 100 98 22:55–04:05 (good) 87.3° at 02:30 120.9° 1.42
M33 Triangulum Pinwheel 66 65 01:40–04:05 (good) 79.1° at 07:05 151.8° 1.42

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2026-07-19"

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"}.