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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 Tuesday, 21 October 2025 · astronomical night 20:03 → 06:08 (10.08 h) · Moon 0% (new moon) · weather: ERA5 history

M31M31 19:35–20:00: quality 0.1M31 20:00–20:05: quality 0.2M31 20:05–21:00: quality 0.4M31 23:00–00:00: quality 0.6observe M31 23:00–23:35M42M45M45 23:00–00:00: quality 0.5NGC 7000NGC 7000 19:35–20:05: quality 0.2NGC 7000 20:05–21:00: quality 0.4NGC 7000 23:00–23:30: quality 0.6NGC 7000 23:30–00:00: quality 0.5observe NGC 7000 20:05–20:40V1057 CygV1057 Cyg 19:35–20:05: quality 0.2V1057 Cyg 20:05–21:00: quality 0.4V1057 Cyg 23:00–23:30: quality 0.6V1057 Cyg 23:30–00:00: quality 0.5observe V1057 Cyg 20:40–21:00M33M33 19:35–20:00: quality 0.1M33 20:00–20:05: quality 0.2M33 20:05–21:00: quality 0.4M33 23:00–00:00: quality 0.6observe M33 23:35–00:00schedule20:0022:0000:0002:0004:0006:00

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
18:30–20:05 — nothing worth pointing at — 1.58
20:05–20:40 NGC 7000 0.58 0.43
20:40–21:00 V1057 Cyg 0.33 0.43
21:00–23:00 — nothing worth pointing at — 2.0
23:00–23:35 M31 0.58 0.57
23:35–00:00 M33 0.42 0.57
00:00–07:45 — nothing worth pointing at — 7.75

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 100 10 23:00–00:00 (marginal) 89.5° at 00:05 149.9° 0.58
M42 Great Orion Nebula 89 0 — 42.9° at 04:55 122.3° 0.0
M45 Seven Sisters 100 6 23:00–00:00 (marginal) 72.5° at 03:05 153.5° 0.0
NGC 7000 North America Nebula 100 16 23:00–00:00 (marginal) 87.3° at 20:20 111.8° 0.58
V1057 Cyg 100 16 23:00–00:00 (marginal) 87.3° at 20:20 111.8° 0.33
M33 Triangulum Pinwheel 100 10 23:00–00:00 (marginal) 79.1° at 00:55 164.3° 0.42

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2025-10-21"

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"}.