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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 Wednesday, 06 August 2025 · astronomical night 22:22 → 04:31 (6.14 h) · Moon 94% (waxing gibbous) · weather: ERA5 history

M31M31 02:00–02:15: quality 0.7M31 02:15–03:00: quality 0.8M31 03:00–03:40: quality 0.7M31 03:40–04:00: quality 0.8M31 04:00–04:35: quality 0.7M31 04:35–05:00: quality 0.4M31 05:00–05:15: quality 0.3M31 05:15–05:55: quality 0.1observe M31 02:00–02:40M42M45M45 02:30–02:35: quality 0.3M45 02:35–02:50: quality 0.4M45 02:50–03:20: quality 0.5M45 03:20–03:40: quality 0.6M45 03:40–04:00: quality 0.7M45 04:00–04:25: quality 0.6M45 04:25–04:35: quality 0.7M45 04:35–05:15: quality 0.3M45 05:15–05:55: quality 0.1observe M45 04:40–05:00NGC 7000NGC 7000 02:00–03:00: quality 0.7NGC 7000 03:00–03:40: quality 0.6NGC 7000 03:40–04:00: quality 0.8NGC 7000 04:00–04:35: quality 0.7NGC 7000 04:35–04:55: quality 0.4NGC 7000 04:55–05:15: quality 0.3NGC 7000 05:15–05:55: quality 0.1observe NGC 7000 03:20–04:00V1057 CygV1057 Cyg 02:00–03:00: quality 0.7V1057 Cyg 03:00–03:40: quality 0.6V1057 Cyg 03:40–04:00: quality 0.8V1057 Cyg 04:00–04:35: quality 0.7V1057 Cyg 04:35–04:55: quality 0.4V1057 Cyg 04:55–05:15: quality 0.3V1057 Cyg 05:15–05:55: quality 0.1observe V1057 Cyg 04:00–04:40M33M33 02:00–02:55: quality 0.7M33 02:55–03:00: quality 0.8M33 03:00–03:40: quality 0.7M33 03:40–04:00: quality 0.8M33 04:00–04:35: quality 0.7M33 04:35–05:00: quality 0.4M33 05:00–05:15: quality 0.3M33 05:15–05:55: quality 0.1observe M33 02:40–03:20scheduleM31M33NGC 7000V1057 Cyg22:0000:0002:0004:0006:00

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
20:30–02:00 — nothing worth pointing at — 5.5
02:00–02:40 M31 0.67 0.75
02:40–03:20 M33 0.67 0.72
03:20–04:00 NGC 7000 0.67 0.72
04:00–04:40 V1057 Cyg 0.67 0.69
04:40–05:00 M45 0.33 0.34
05:00–06:25 — nothing worth pointing at — 1.42

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 100 43 02:00–04:35 (good) 89.6° at 05:00 102.9° 0.67
M42 Great Orion Nebula 0 0 — 42.9° at 09:55 140.3° 0.0
M45 Seven Sisters 41 32 03:30–04:35 (good) 72.5° at 08:05 134.4° 0.33
NGC 7000 North America Nebula 100 38 02:00–04:35 (good) 87.2° at 01:20 75.7° 0.67
V1057 Cyg 100 38 02:00–04:35 (good) 87.3° at 01:20 75.7° 0.67
M33 Triangulum Pinwheel 100 54 02:00–04:35 (good) 79.1° at 05:55 108.3° 0.67

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2025-08-06"

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"}.