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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, 23 August 2026 · astronomical night 21:50 → 04:56 (7.1 h) · Moon 83% (waxing gibbous) · weather: ERA5 history

M31M31 21:20–21:55: quality 0.2M31 21:55–22:00: quality 0.5M31 22:00–22:15: quality 0.4M31 22:15–23:00: quality 0.5M31 23:00–23:25: quality 0.6M31 23:25–01:00: quality 0.7M31 01:00–02:20: quality 0.8M31 02:20–04:00: quality 0.9M31 04:00–05:00: quality 0.8M31 05:00–05:35: quality 0.3M31 05:35–06:00: quality 0.1observe M31 00:25–02:00M42M42 05:00–05:25: quality 0.1M42 05:25–05:35: quality 0.2M42 05:35–06:00: quality 0.1M45M45 01:25–01:30: quality 0.3M45 01:30–01:45: quality 0.4M45 01:45–02:00: quality 0.5M45 02:00–02:10: quality 0.6M45 02:10–02:20: quality 0.7M45 02:20–05:00: quality 0.8M45 05:00–05:35: quality 0.3M45 05:35–06:00: quality 0.1observe M45 03:35–05:00NGC 7000NGC 7000 20:40–21:15: quality 0.1NGC 7000 21:15–21:55: quality 0.3NGC 7000 21:55–22:00: quality 0.6NGC 7000 22:00–23:00: quality 0.5NGC 7000 23:00–23:05: quality 0.6NGC 7000 23:05–02:00: quality 0.7NGC 7000 02:00–02:20: quality 0.8NGC 7000 02:20–04:00: quality 0.9NGC 7000 04:00–04:15: quality 0.8NGC 7000 04:15–05:00: quality 0.7NGC 7000 05:00–05:35: quality 0.2NGC 7000 05:35–06:00: quality 0.1observe NGC 7000 21:15–22:50V1057 CygV1057 Cyg 20:40–21:15: quality 0.1V1057 Cyg 21:15–21:55: quality 0.3V1057 Cyg 21:55–22:00: quality 0.6V1057 Cyg 22:00–23:00: quality 0.5V1057 Cyg 23:00–23:10: quality 0.6V1057 Cyg 23:10–02:00: quality 0.7V1057 Cyg 02:00–02:20: quality 0.8V1057 Cyg 02:20–04:00: quality 0.9V1057 Cyg 04:00–04:15: quality 0.8V1057 Cyg 04:15–05:00: quality 0.7V1057 Cyg 05:00–05:35: quality 0.2V1057 Cyg 05:35–06:00: quality 0.1observe V1057 Cyg 22:50–00:25M33M33 22:50–23:00: quality 0.3M33 23:00–23:20: quality 0.4M33 23:20–23:35: quality 0.5M33 23:35–00:25: quality 0.6M33 00:25–01:25: quality 0.7M33 01:25–02:20: quality 0.8M33 02:20–04:00: quality 0.9M33 04:00–05:00: quality 0.8M33 05:00–05:35: quality 0.3M33 05:35–06:00: quality 0.1observe M33 02:00–03:35scheduleNGC 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
20:05–21:15 — nothing worth pointing at — 1.17
21:15–22:50 NGC 7000 1.58 0.44
22:50–00:25 V1057 Cyg 1.58 0.64
00:25–02:00 M31 1.58 0.77
02:00–03:35 M33 1.58 0.91
03:35–05:00 M45 1.42 0.8
05:00–06:40 — nothing worth pointing at — 1.67

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 100 85 23:00–05:00 (good) 89.7° at 03:55 104.9° 1.58
M42 Great Orion Nebula 2 1 — 42.9° at 08:50 142.4° 0.0
M45 Seven Sisters 81 69 02:05–05:00 (good) 72.5° at 07:00 137.3° 1.42
NGC 7000 North America Nebula 100 85 23:00–05:00 (good) 87.2° at 00:10 76.4° 1.58
V1057 Cyg 100 85 23:00–05:00 (good) 87.3° at 00:10 76.3° 1.58
M33 Triangulum Pinwheel 100 87 23:45–05:00 (good) 79.1° at 04:45 110.8° 1.58

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2026-08-23"

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"}.