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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, 26 July 2026 · astronomical night 22:42 → 04:13 (5.52 h) · Moon 93% (waxing gibbous) · weather: ERA5 history

M31M31 23:10–23:25: quality 0.2M31 23:25–23:55: quality 0.3M31 23:55–00:00: quality 0.4M31 00:00–00:10: quality 0.6M31 00:10–01:10: quality 0.7M31 01:10–02:40: quality 0.8M31 02:40–03:00: quality 0.9M31 03:00–03:30: quality 0.8M31 03:30–04:00: quality 0.9M31 04:00–04:15: quality 0.7M31 04:15–05:00: quality 0.3M31 05:00–05:40: quality 0.1observe M31 00:50–02:15observe M31 04:15–05:00M42M45M45 03:15–03:20: quality 0.3M45 03:20–03:30: quality 0.4M45 03:30–03:45: quality 0.5M45 03:45–04:00: quality 0.6M45 04:00–04:10: quality 0.5M45 04:10–04:15: quality 0.6M45 04:15–05:00: quality 0.3M45 05:00–05:40: quality 0.1observe M45 03:40–04:15NGC 7000NGC 7000 21:20–22:00: quality 0.1NGC 7000 22:00–22:45: quality 0.3NGC 7000 22:45–23:00: quality 0.7NGC 7000 23:00–00:00: quality 0.4NGC 7000 00:00–01:45: quality 0.7NGC 7000 01:45–02:00: quality 0.8NGC 7000 02:00–02:10: quality 0.7NGC 7000 02:10–03:00: quality 0.8NGC 7000 03:00–03:30: quality 0.7NGC 7000 03:30–04:00: quality 0.9NGC 7000 04:00–04:15: quality 0.7NGC 7000 04:15–05:00: quality 0.3NGC 7000 05:00–05:40: quality 0.1observe NGC 7000 22:00–23:25V1057 CygV1057 Cyg 21:20–22:00: quality 0.1V1057 Cyg 22:00–22:45: quality 0.3V1057 Cyg 22:45–23:00: quality 0.7V1057 Cyg 23:00–00:00: quality 0.4V1057 Cyg 00:00–01:45: quality 0.7V1057 Cyg 01:45–02:00: quality 0.8V1057 Cyg 02:00–02:10: quality 0.7V1057 Cyg 02:10–03:00: quality 0.8V1057 Cyg 03:00–03:30: quality 0.7V1057 Cyg 03:30–04:00: quality 0.9V1057 Cyg 04:00–04:15: quality 0.7V1057 Cyg 04:15–05:00: quality 0.3V1057 Cyg 05:00–05:40: quality 0.1observe V1057 Cyg 23:25–00:50M33M33 00:40–00:55: quality 0.4M33 00:55–01:10: quality 0.5M33 01:10–01:25: quality 0.6M33 01:25–02:10: quality 0.7M33 02:10–03:00: quality 0.8M33 03:00–03:15: quality 0.7M33 03:15–03:45: quality 0.8M33 03:45–04:00: quality 0.9M33 04:00–04:15: quality 0.7M33 04:15–05:00: quality 0.3M33 05:00–05:40: quality 0.1observe M33 02:15–03:40scheduleNGC 7000V1057 CygM31M33M45M3122:0000:0002:0004:0006:00

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
20:45–22:00 — nothing worth pointing at — 1.25
22:00–23:25 NGC 7000 1.42 0.41
23:25–00:50 V1057 Cyg 1.42 0.6
00:50–02:15 M31 1.42 0.77
02:15–03:40 M33 1.42 0.78
03:40–04:15 M45 0.58 0.56
04:15–05:00 M31 0.75 0.34
05:00–06:15 — nothing worth pointing at — 1.25

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 100 88 00:00–04:15 (good) 89.7° at 05:45 112.0° 2.17
M42 Great Orion Nebula 0 0 — 42.9° at 10:40 145.3° 0.0
M45 Seven Sisters 20 15 03:55–04:00 (good) 72.5° at 08:50 145.5° 0.58
NGC 7000 North America Nebula 100 86 00:00–04:15 (good) 87.2° at 02:00 80.7° 1.42
V1057 Cyg 100 86 00:00–04:15 (good) 87.3° at 02:00 80.6° 1.42
M33 Triangulum Pinwheel 79 70 01:20–04:15 (good) 79.1° at 06:35 118.7° 1.42

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2026-07-26"

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"}.