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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, 10 June 2025 · astronomical night 23:04 → 03:36 (4.53 h) · Moon 100% (full moon) · weather: ERA5 history

M31M31 02:10–02:20: quality 0.2M31 02:20–02:50: quality 0.3M31 02:50–03:00: quality 0.4M31 03:00–03:40: quality 0.3M31 03:40–04:00: quality 0.2observe M31 02:35–03:00observe M31 03:30–03:40M42M45NGC 7000NGC 7000 00:00–00:45: quality 0.6NGC 7000 00:45–01:00: quality 0.7NGC 7000 01:00–01:15: quality 0.6NGC 7000 01:15–02:00: quality 0.7NGC 7000 02:00–02:10: quality 0.4NGC 7000 02:10–03:00: quality 0.5NGC 7000 03:00–03:40: quality 0.3NGC 7000 03:40–04:00: quality 0.2observe NGC 7000 00:00–01:15observe NGC 7000 03:00–03:30V1057 CygV1057 Cyg 00:00–00:45: quality 0.6V1057 Cyg 00:45–01:00: quality 0.7V1057 Cyg 01:00–01:15: quality 0.6V1057 Cyg 01:15–02:00: quality 0.7V1057 Cyg 02:00–02:10: quality 0.4V1057 Cyg 02:10–03:00: quality 0.5V1057 Cyg 03:00–03:40: quality 0.3V1057 Cyg 03:40–04:00: quality 0.2observe V1057 Cyg 01:15–02:35M33M33 03:40–04:00: quality 0.1scheduleNGC 7000V1057 CygNGC 700022:0000:0002:0004:00

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
20:55–00:00 — nothing worth pointing at — 3.08
00:00–01:15 NGC 7000 1.25 0.64
01:15–02:35 V1057 Cyg 1.33 0.58
02:35–03:00 M31 0.42 0.34
03:00–03:30 NGC 7000 0.5 0.34
03:30–03:40 M31 0.17 0.32
03:40–05:50 — nothing worth pointing at — 2.17

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 25 10 03:10–03:40 (marginal) 89.7° at 08:45 127.2° 0.58
M42 Great Orion Nebula 0 0 — 42.9° at 13:40 145.7° 0.0
M45 Seven Sisters 0 0 — 72.5° at 11:50 164.0° 0.0
NGC 7000 North America Nebula 75 40 00:00–02:00 (good) 87.2° at 05:00 90.8° 1.75
V1057 Cyg 74 40 00:00–02:00 (good) 87.3° at 05:00 90.7° 1.33
M33 Triangulum Pinwheel 2 0 — 79.1° at 09:35 136.1° 0.0

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2025-06-10"

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"}.