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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, 10 August 2026 · astronomical night 22:15 → 04:37 (6.35 h) · Moon 5% (waning crescent) · weather: ERA5 history

M31M31 22:10–22:20: quality 0.2M31 22:20–22:35: quality 0.5M31 22:35–22:55: quality 0.6M31 22:55–23:10: quality 0.7M31 23:10–00:10: quality 0.8M31 00:10–01:35: quality 0.9M31 01:35–04:40: quality 1.0M31 04:40–05:20: quality 0.5M31 05:20–05:55: quality 0.1observe M31 00:50–02:25M42M45M45 02:15–02:25: quality 0.4M45 02:25–02:40: quality 0.5M45 02:40–02:50: quality 0.6M45 02:50–03:05: quality 0.7M45 03:05–03:50: quality 0.8M45 03:50–04:40: quality 0.9M45 04:40–04:45: quality 0.4M45 04:45–05:20: quality 0.5M45 05:20–05:55: quality 0.1observe M45 04:00–05:20NGC 7000NGC 7000 21:00–21:40: quality 0.1NGC 7000 21:40–22:00: quality 0.4NGC 7000 22:00–22:20: quality 0.5NGC 7000 22:20–04:30: quality 1.0NGC 7000 04:30–04:40: quality 0.9NGC 7000 04:40–05:10: quality 0.5NGC 7000 05:10–05:20: quality 0.4NGC 7000 05:20–05:55: quality 0.1observe NGC 7000 21:40–23:15V1057 CygV1057 Cyg 21:00–21:40: quality 0.1V1057 Cyg 21:40–22:00: quality 0.4V1057 Cyg 22:00–22:20: quality 0.5V1057 Cyg 22:20–04:30: quality 1.0V1057 Cyg 04:30–04:40: quality 0.9V1057 Cyg 04:40–05:10: quality 0.5V1057 Cyg 05:10–05:20: quality 0.4V1057 Cyg 05:20–05:55: quality 0.1observe V1057 Cyg 23:15–00:50M33M33 23:40–23:50: quality 0.4M33 23:50–00:05: quality 0.5M33 00:05–00:20: quality 0.6M33 00:20–00:35: quality 0.7M33 00:35–01:30: quality 0.8M33 01:30–02:40: quality 0.9M33 02:40–04:40: quality 1.0M33 04:40–05:20: quality 0.5M33 05:20–05:55: quality 0.1observe M33 02:25–04:00scheduleNGC 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
20:25–21:40 — nothing worth pointing at — 1.25
21:40–23:15 NGC 7000 1.58 0.76
23:15–00:50 V1057 Cyg 1.58 0.98
00:50–02:25 M31 1.58 0.95
02:25–04:00 M33 1.58 0.98
04:00–05:20 M45 1.33 0.67
05:20–06:30 — nothing worth pointing at — 1.17

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 100 99 22:45–04:40 (good) 89.5° at 04:45 84.9° 1.58
M42 Great Orion Nebula 0 0 — 42.9° at 09:40 43.4° 0.0
M45 Seven Sisters 49 49 02:45–04:40 (good) 72.5° at 07:50 53.9° 1.33
NGC 7000 North America Nebula 100 99 22:20–04:40 (good) 87.2° at 01:05 109.2° 1.58
V1057 Cyg 100 99 22:20–04:40 (good) 87.3° at 01:05 109.3° 1.58
M33 Triangulum Pinwheel 100 100 00:10–04:40 (good) 79.1° at 05:40 80.0° 1.58

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2026-08-10"

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"}.