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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 Monday, 13 July 2026 · astronomical night 22:59 → 03:54 (4.91 h) · Moon 0% (new moon) · weather: ERA5 history

M31M31 00:00–00:15: quality 0.4M31 00:15–00:35: quality 0.5M31 00:35–00:55: quality 0.6M31 00:55–01:25: quality 0.7M31 01:25–02:55: quality 0.8M31 02:55–03:00: quality 0.9M31 03:00–03:55: quality 0.8M31 03:55–04:45: quality 0.4M31 04:45–05:30: quality 0.1observe M31 01:35–03:15M42M45M45 04:05–04:30: quality 0.2M45 04:30–04:45: quality 0.3M45 04:45–05:30: quality 0.1NGC 7000NGC 7000 21:30–22:15: quality 0.1NGC 7000 22:15–23:00: quality 0.4NGC 7000 23:00–23:45: quality 0.8NGC 7000 23:45–03:55: quality 0.9NGC 7000 03:55–04:45: quality 0.4NGC 7000 04:45–05:30: quality 0.1observe NGC 7000 22:15–23:55V1057 CygV1057 Cyg 21:30–22:15: quality 0.1V1057 Cyg 22:15–23:00: quality 0.4V1057 Cyg 23:00–23:45: quality 0.8V1057 Cyg 23:45–03:55: quality 0.9V1057 Cyg 03:55–04:45: quality 0.4V1057 Cyg 04:45–05:30: quality 0.1observe V1057 Cyg 23:55–01:35M33M33 01:30–01:45: quality 0.4M33 01:45–02:00: quality 0.5M33 02:00–02:15: quality 0.6M33 02:15–02:40: quality 0.7M33 02:40–03:00: quality 0.8M33 03:00–03:30: quality 0.7M33 03:30–03:55: quality 0.8M33 03:55–04:45: quality 0.4M33 04:45–05:30: quality 0.1observe M33 03:15–04:45scheduleNGC 7000V1057 CygM31M3322:0000:0002:0004:00

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
20:55–22:15 — nothing worth pointing at — 1.33
22:15–23:55 NGC 7000 1.67 0.63
23:55–01:35 V1057 Cyg 1.67 0.9
01:35–03:15 M31 1.67 0.81
03:15–04:45 M33 1.5 0.57
04:45–06:00 — nothing worth pointing at — 1.25

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 92 83 00:45–03:55 (good) 89.5° at 06:35 77.2° 1.67
M42 Great Orion Nebula 0 0 — 42.9° at 11:30 38.6° 0.0
M45 Seven Sisters 2 2 — 72.5° at 09:40 45.0° 0.0
NGC 7000 North America Nebula 100 89 23:00–03:55 (good) 87.2° at 02:55 104.9° 1.67
V1057 Cyg 100 89 23:00–03:55 (good) 87.3° at 02:55 104.9° 1.67
M33 Triangulum Pinwheel 52 47 02:10–03:55 (good) 79.1° at 07:30 71.5° 1.5

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2026-07-13"

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"}.