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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 Friday, 21 August 2026 · astronomical night 21:54 → 04:53 (6.99 h) · Moon 67% (waxing gibbous) · weather: ERA5 history

VegaVega 20:45–21:20: quality 0.1Vega 21:20–21:55: quality 0.4Vega 21:55–00:30: quality 0.8Vega 00:30–01:20: quality 1.0Vega 01:20–02:45: quality 0.9Vega 02:45–03:35: quality 0.8Vega 03:35–03:50: quality 0.7Vega 03:50–04:05: quality 0.6Vega 04:05–04:20: quality 0.5Vega 04:20–04:30: quality 0.4observe Vega 21:20–04:30scheduleVega22:0000:0002:0004:0006:00

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
20:10–21:20 — nothing worth pointing at — 1.17
21:20–04:30 Vega 7.17 0.78
04:30–06:40 — nothing worth pointing at — 2.17

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
Vega Vega 100 100 21:55–04:00 (good) 87.1° at 22:00 69.8° 7.17

💡 API
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2026-08-21"

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"}.