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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, 02 April 2027 · astronomical night 21:23 → 05:25 (8.04 h) · Moon 16% (waning crescent) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M42M42 20:20–20:50: quality 0.1M42 20:50–21:15: quality 0.4M42 21:15–21:25: quality 0.3M42 21:25–21:40: quality 0.6M42 21:40–21:55: quality 0.5M42 21:55–22:05: quality 0.4observe M42 22:00–22:05M45M45 20:20–20:50: quality 0.1M45 20:50–21:25: quality 0.4M45 21:25–21:30: quality 0.7M45 21:30–21:45: quality 0.6M45 21:45–22:00: quality 0.5M45 22:00–22:05: quality 0.4observe M45 20:50–22:00NGC 7000NGC 7000 02:45–02:55: quality 0.4NGC 7000 02:55–03:10: quality 0.5NGC 7000 03:10–03:30: quality 0.6NGC 7000 03:30–03:45: quality 0.7NGC 7000 03:45–04:40: quality 0.8NGC 7000 04:40–05:30: quality 0.9NGC 7000 05:30–06:00: quality 0.4NGC 7000 06:00–06:35: quality 0.1observe NGC 7000 02:45–03:55V1057 CygV1057 Cyg 02:45–02:55: quality 0.4V1057 Cyg 02:55–03:10: quality 0.5V1057 Cyg 03:10–03:30: quality 0.6V1057 Cyg 03:30–03:45: quality 0.7V1057 Cyg 03:45–04:40: quality 0.8V1057 Cyg 04:40–05:30: quality 0.9V1057 Cyg 05:30–06:00: quality 0.4V1057 Cyg 06:00–06:35: quality 0.1observe V1057 Cyg 03:55–06:00M33scheduleM45NGC 7000V1057 Cyg20:0022:0000:0002:0004:0006:00

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
19:45–20:50 — nothing worth pointing at — 1.08
20:50–22:00 M45 1.17 0.48
22:00–22:05 M42 0.08 0.42
22:05–02:45 — nothing worth pointing at — 4.67
02:45–03:55 NGC 7000 1.17 0.6
03:55–06:00 V1057 Cyg 2.08 0.75
06:00–07:05 — nothing worth pointing at — 1.08

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 0 unknown — 89.6° at 13:25 66.9° 0.0
M42 Great Orion Nebula 10 unknown 21:25–21:35 (good) 42.9° at 18:15 114.2° 0.08
M45 Seven Sisters 11 unknown 21:25–21:35 (good) 72.5° at 16:25 94.3° 1.17
NGC 7000 North America Nebula 52 unknown 03:20–05:30 (good) 87.3° at 09:35 58.0° 1.17
V1057 Cyg 52 unknown 03:20–05:30 (good) 87.3° at 09:35 58.0° 2.08
M33 Triangulum Pinwheel 0 unknown — 79.1° at 14:15 68.9° 0.0

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2027-04-02"

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"}.