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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 Thursday, 23 October 2025 · astronomical night 20:00 → 06:10 (10.17 h) · Moon 5% (waxing crescent) · weather: ERA5 history

M31M31 19:00–19:30: quality 0.1M31 19:30–20:05: quality 0.4M31 20:05–20:30: quality 0.8M31 20:30–21:00: quality 0.9M31 21:00–22:00: quality 0.6M31 06:00–06:15: quality 0.1observe M31 20:40–21:15M42M42 06:00–06:45: quality 0.1M45M45 21:25–21:50: quality 0.3M45 21:50–22:00: quality 0.4M45 06:00–06:45: quality 0.1observe M45 21:50–22:00NGC 7000NGC 7000 19:00–19:30: quality 0.1NGC 7000 19:30–20:00: quality 0.5NGC 7000 20:00–20:05: quality 0.4NGC 7000 20:05–21:00: quality 0.9NGC 7000 21:00–22:00: quality 0.6observe NGC 7000 19:30–20:05V1057 CygV1057 Cyg 19:00–19:30: quality 0.1V1057 Cyg 19:30–20:00: quality 0.5V1057 Cyg 20:00–20:05: quality 0.4V1057 Cyg 20:05–21:00: quality 0.9V1057 Cyg 21:00–22:00: quality 0.6observe V1057 Cyg 20:05–20:40M33M33 19:00–19:30: quality 0.1M33 19:30–19:35: quality 0.3M33 19:35–20:05: quality 0.4M33 20:05–20:15: quality 0.7M33 20:15–21:00: quality 0.8M33 21:00–21:10: quality 0.5M33 21:10–22:00: quality 0.6M33 06:00–06:15: quality 0.1observe M33 21:15–21:50schedule20:0022:0000:0002:0004:0006:00

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
18:25–19:30 — nothing worth pointing at — 1.08
19:30–20:05 NGC 7000 0.58 0.48
20:05–20:40 V1057 Cyg 0.58 0.9
20:40–21:15 M31 0.58 0.76
21:15–21:50 M33 0.58 0.57
21:50–22:00 M45 0.17 0.38
22:00–07:45 — nothing worth pointing at — 9.75

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 100 17 20:05–22:00 (good) 89.7° at 23:55 140.7° 0.58
M42 Great Orion Nebula 89 2 — 42.9° at 04:45 138.2° 0.0
M45 Seven Sisters 100 3 21:40–22:00 (marginal) 72.5° at 03:00 177.1° 0.17
NGC 7000 North America Nebula 100 27 20:05–22:00 (good) 87.3° at 20:10 100.8° 0.58
V1057 Cyg 100 27 20:05–22:00 (good) 87.3° at 20:10 100.8° 0.58
M33 Triangulum Pinwheel 100 16 20:05–21:00 (good) 79.1° at 00:45 152.7° 0.58

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2025-10-23"

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"}.