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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, 08 April 2026 · astronomical night 21:31 → 05:13 (7.69 h) · Moon 62% (waning gibbous) · weather: ERA5 history

M31M42M42 20:25–21:00: quality 0.1M42 21:00–21:25: quality 0.3M42 21:25–21:35: quality 0.2M42 21:35–21:40: quality 0.4observe M42 21:35–21:40M45M45 20:25–21:00: quality 0.1M45 21:00–21:25: quality 0.3M45 21:25–21:35: quality 0.2M45 21:35–21:40: quality 0.4observe M45 21:00–21:15NGC 7000NGC 7000 06:00–06:25: quality 0.1V1057 CygV1057 Cyg 06:00–06:25: quality 0.1M33schedule20:0022:0000:0002:0004:0006:00

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
19:50–21:00 — nothing worth pointing at — 1.17
21:00–21:15 M45 0.25 0.32
21:15–21:35 — nothing worth pointing at — 0.33
21:35–21:40 M42 0.08 0.42
21:40–06:55 — nothing worth pointing at — 9.25

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 0 0 — 89.6° at 13:00 111.5° 0.0
M42 Great Orion Nebula 3 3 21:00–21:10 (marginal) 42.9° at 17:50 144.7° 0.08
M45 Seven Sisters 3 3 21:00–21:15 (marginal) 72.5° at 16:00 144.7° 0.25
NGC 7000 North America Nebula 41 0 — 87.3° at 09:10 80.6° 0.0
V1057 Cyg 41 0 — 87.3° at 09:10 80.5° 0.0
M33 Triangulum Pinwheel 0 0 — 79.1° at 13:50 118.0° 0.0

Left out


💡 API
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2026-04-08"

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"}.