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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.

Try: an autumn deep-sky night  ·  ← previous night · next night →

Night of Sunday, 04 May 2025 · astronomical night 22:12 → 04:22 (6.18 h) · Moon 54% (waxing gibbous) · weather: ERA5 history

M31M31 05:00–05:05: quality 0.2M31 05:05–05:45: quality 0.1M42M45NGC 7000NGC 7000 00:40–01:00: quality 0.3NGC 7000 01:00–02:00: quality 0.2NGC 7000 05:00–05:05: quality 0.4NGC 7000 05:05–05:45: quality 0.1observe NGC 7000 00:45–01:00observe NGC 7000 05:00–05:05V1057 CygV1057 Cyg 00:40–01:00: quality 0.3V1057 Cyg 01:00–02:00: quality 0.2V1057 Cyg 05:00–05:05: quality 0.4V1057 Cyg 05:05–05:45: quality 0.1M33schedule22:0000:0002:0004:0006:00

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
20:20–00:45 — nothing worth pointing at — 4.42
00:45–01:00 NGC 7000 0.25 0.33
01:00–05:00 — nothing worth pointing at — 4.0
05:00–05:05 NGC 7000 0.08 0.38
05:05–06:15 — nothing worth pointing at — 1.17

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 1 0 — 89.6° at 11:10 105.6° 0.0
M42 Great Orion Nebula 0 0 — 42.9° at 16:05 62.2° 0.0
M45 Seven Sisters 0 0 — 72.5° at 14:20 78.9° 0.0
NGC 7000 North America Nebula 81 10 00:45–01:00 (marginal) 87.2° at 07:30 117.1° 0.33
V1057 Cyg 81 10 00:45–01:00 (marginal) 87.3° at 07:30 117.2° 0.0
M33 Triangulum Pinwheel 0 0 — 79.1° at 12:05 103.6° 0.0

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2025-05-04"

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"}.