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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 Thursday, 20 May 2027 · astronomical night 22:37 → 03:57 (5.33 h) · Moon 100% (full moon) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 03:35–03:50: quality 0.4M31 03:50–04:00: quality 0.5M31 04:00–04:35: quality 0.3M31 04:35–04:45: quality 0.4M31 04:45–05:25: quality 0.1observe M31 03:35–04:00observe M31 04:30–04:45M42M45NGC 7000NGC 7000 23:35–23:45: quality 0.3NGC 7000 23:45–00:05: quality 0.4NGC 7000 00:05–00:30: quality 0.5NGC 7000 00:30–01:20: quality 0.6NGC 7000 01:20–03:05: quality 0.7NGC 7000 03:05–04:00: quality 0.8NGC 7000 04:00–04:45: quality 0.4NGC 7000 04:45–05:25: quality 0.1observe NGC 7000 23:35–01:20observe NGC 7000 04:00–04:30V1057 CygV1057 Cyg 23:35–23:45: quality 0.3V1057 Cyg 23:45–00:10: quality 0.4V1057 Cyg 00:10–00:30: quality 0.5V1057 Cyg 00:30–01:20: quality 0.6V1057 Cyg 01:20–03:10: quality 0.7V1057 Cyg 03:10–04:00: quality 0.8V1057 Cyg 04:00–04:45: quality 0.4V1057 Cyg 04:45–05:25: quality 0.1observe V1057 Cyg 01:20–03:35M33M33 05:05–05:25: quality 0.1scheduleNGC 7000V1057 Cyg22:0000:0002:0004:00

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
20:35–23:35 — nothing worth pointing at — 3.0
23:35–01:20 NGC 7000 1.75 0.52
01:20–03:35 V1057 Cyg 2.25 0.71
03:35–04:00 M31 0.42 0.43
04:00–04:30 NGC 7000 0.5 0.4
04:30–04:45 M31 0.25 0.36
04:45–06:00 — nothing worth pointing at — 1.25

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 6 unknown 03:35–04:00 (marginal) 89.7° at 10:10 135.0° 0.67
M42 Great Orion Nebula 0 unknown — 42.9° at 15:05 142.5° 0.0
M45 Seven Sisters 0 unknown — 72.5° at 13:20 174.6° 0.0
NGC 7000 North America Nebula 64 unknown 00:40–04:00 (good) 87.2° at 06:25 96.3° 2.25
V1057 Cyg 64 unknown 00:40–04:00 (good) 87.3° at 06:25 96.2° 2.25
M33 Triangulum Pinwheel 0 unknown — 79.1° at 11:00 145.6° 0.0

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2027-05-20"

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"}.