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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, 16 April 2026 · astronomical night 21:43 → 04:57 (7.24 h) · Moon 0% (new moon) · weather: ERA5 history

M31M31 05:45–06:00: quality 0.1M42M45NGC 7000NGC 7000 02:00–02:20: quality 0.1NGC 7000 02:20–03:00: quality 0.2NGC 7000 04:00–04:50: quality 0.4NGC 7000 04:50–05:00: quality 0.5NGC 7000 05:00–05:35: quality 0.4NGC 7000 05:35–06:10: quality 0.1observe NGC 7000 04:00–04:50V1057 CygV1057 Cyg 02:00–02:20: quality 0.1V1057 Cyg 02:20–03:00: quality 0.2V1057 Cyg 04:00–04:50: quality 0.4V1057 Cyg 04:50–05:00: quality 0.5V1057 Cyg 05:00–05:35: quality 0.4V1057 Cyg 05:35–06:10: quality 0.1observe V1057 Cyg 04:50–05:35M33scheduleNGC 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
20:00–04:00 — nothing worth pointing at — 8.0
04:00–04:50 NGC 7000 0.83 0.44
04:50–05:35 V1057 Cyg 0.75 0.41
05:35–06:40 — nothing worth pointing at — 1.08

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 0 0 — 89.5° at 12:25 31.0° 0.0
M42 Great Orion Nebula 0 0 — 42.9° at 17:20 69.0° 0.0
M45 Seven Sisters 0 0 — 72.5° at 15:30 40.4° 0.0
NGC 7000 North America Nebula 65 21 04:00–05:35 (marginal) 87.3° at 08:40 62.5° 0.83
V1057 Cyg 65 21 04:00–05:35 (marginal) 87.3° at 08:40 62.4° 0.75
M33 Triangulum Pinwheel 0 0 — 79.1° at 13:20 21.0° 0.0

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2026-04-16"

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"}.