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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, 26 September 2025 · astronomical night 20:44 → 05:40 (8.95 h) · Moon 22% (waxing crescent) · weather: ERA5 history

M31M31 00:00–01:00: quality 0.6M31 01:00–03:00: quality 0.5M31 05:00–06:00: quality 0.1observe M31 00:00–00:40M42M42 02:50–03:00: quality 0.2M42 05:00–06:00: quality 0.1M45M45 00:00–00:50: quality 0.5M45 00:50–01:00: quality 0.6M45 01:00–01:45: quality 0.4M45 01:45–03:00: quality 0.5M45 05:00–06:00: quality 0.1observe M45 02:00–02:40NGC 7000NGC 7000 00:00–01:00: quality 0.6NGC 7000 01:00–01:55: quality 0.5NGC 7000 01:55–02:00: quality 0.4NGC 7000 02:00–02:45: quality 0.5NGC 7000 02:45–03:00: quality 0.4observe NGC 7000 00:40–01:20V1057 CygV1057 Cyg 00:00–01:00: quality 0.6V1057 Cyg 01:00–01:55: quality 0.5V1057 Cyg 01:55–02:00: quality 0.4V1057 Cyg 02:00–02:45: quality 0.5V1057 Cyg 02:45–03:00: quality 0.4observe V1057 Cyg 02:40–03:00M33M33 00:00–01:00: quality 0.6M33 01:00–03:00: quality 0.5M33 05:00–06:00: quality 0.1observe M33 01:20–02:00scheduleM31NGC 7000M33M4520:0022:0000:0002:0004:0006:00

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
19:10–00:00 — nothing worth pointing at — 4.83
00:00–00:40 M31 0.67 0.64
00:40–01:20 NGC 7000 0.67 0.56
01:20–02:00 M33 0.67 0.49
02:00–02:40 M45 0.67 0.5
02:40–03:00 V1057 Cyg 0.33 0.45
03:00–07:15 — nothing worth pointing at — 4.25

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 100 19 00:00–01:00 (good) 89.6° at 01:40 138.6° 0.67
M42 Great Orion Nebula 55 3 — 42.9° at 06:35 139.9° 0.0
M45 Seven Sisters 100 26 00:00–03:00 (marginal) 72.5° at 04:45 179.0° 0.67
NGC 7000 North America Nebula 100 20 00:00–01:00 (good) 87.2° at 21:55 99.1° 0.67
V1057 Cyg 100 20 00:00–01:00 (good) 87.3° at 22:00 99.1° 0.33
M33 Triangulum Pinwheel 100 20 00:00–01:00 (good) 79.1° at 02:30 150.0° 0.67

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2025-09-26"

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"}.