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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 Friday, 07 August 2026 · astronomical night 22:21 → 04:32 (6.18 h) · Moon 30% (waning crescent) · weather: ERA5 history

M31M31 22:20–22:25: quality 0.2M31 22:25–22:40: quality 0.4M31 22:40–22:55: quality 0.5M31 22:55–23:10: quality 0.6M31 23:10–23:25: quality 0.7M31 23:25–00:30: quality 0.8M31 00:30–01:05: quality 0.9M31 01:05–01:55: quality 0.8M31 01:55–04:00: quality 0.9M31 04:00–04:35: quality 0.8M31 04:35–05:15: quality 0.4M31 05:15–05:55: quality 0.1observe M31 00:45–02:15M42M45M45 02:30–02:45: quality 0.4M45 02:45–03:05: quality 0.5M45 03:05–03:20: quality 0.6M45 03:20–04:35: quality 0.7M45 04:35–05:15: quality 0.4M45 05:15–05:55: quality 0.1observe M45 03:45–05:15NGC 7000NGC 7000 21:05–21:45: quality 0.1NGC 7000 21:45–22:25: quality 0.4NGC 7000 22:25–00:00: quality 0.9NGC 7000 00:00–01:05: quality 1.0NGC 7000 01:05–04:35: quality 0.9NGC 7000 04:35–05:15: quality 0.4NGC 7000 05:15–05:55: quality 0.1observe NGC 7000 21:45–23:15V1057 CygV1057 Cyg 21:05–21:45: quality 0.1V1057 Cyg 21:45–22:25: quality 0.4V1057 Cyg 22:25–00:00: quality 0.9V1057 Cyg 00:00–01:05: quality 1.0V1057 Cyg 01:05–04:35: quality 0.9V1057 Cyg 04:35–05:15: quality 0.4V1057 Cyg 05:15–05:55: quality 0.1observe V1057 Cyg 23:15–00:45M33M33 23:55–00:05: quality 0.4M33 00:05–00:15: quality 0.5M33 00:15–00:30: quality 0.6M33 00:30–00:45: quality 0.7M33 00:45–01:05: quality 0.8M33 01:05–01:40: quality 0.7M33 01:40–04:35: quality 0.8M33 04:35–05:15: quality 0.4M33 05:15–05:55: quality 0.1observe M33 02:15–03:45scheduleNGC 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
20:30–21:45 — nothing worth pointing at — 1.25
21:45–23:15 NGC 7000 1.5 0.7
23:15–00:45 V1057 Cyg 1.5 0.96
00:45–02:15 M31 1.5 0.85
02:15–03:45 M33 1.5 0.82
03:45–05:15 M45 1.5 0.55
05:15–06:25 — nothing worth pointing at — 1.17

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 91 89 23:00–04:35 (good) 89.6° at 05:00 48.0° 1.5
M42 Great Orion Nebula 0 0 — 42.9° at 09:50 36.2° 0.0
M45 Seven Sisters 29 29 03:10–04:35 (good) 72.5° at 08:00 10.0° 1.5
NGC 7000 North America Nebula 100 97 22:25–04:35 (good) 87.3° at 01:15 85.8° 1.5
V1057 Cyg 100 97 22:25–04:35 (good) 87.3° at 01:15 85.8° 1.5
M33 Triangulum Pinwheel 83 82 00:25–04:35 (good) 79.1° at 05:50 38.3° 1.5

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2026-08-07"

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"}.