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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, 21 February 2040 · astronomical night 19:33 → 05:34 (10.02 h) · Moon 69% (waxing gibbous) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 18:30–19:05: quality 0.1M31 19:05–19:35: quality 0.3M31 19:35–20:50: quality 0.5M31 20:50–21:15: quality 0.4M31 21:15–21:45: quality 0.3observe M31 19:35–20:30M42M42 18:30–19:05: quality 0.1M42 19:05–19:35: quality 0.2M42 19:35–23:00: quality 0.4M42 23:00–23:35: quality 0.3M42 23:35–23:45: quality 0.2observe M42 22:20–23:20M45M45 18:30–19:05: quality 0.1M45 19:05–19:35: quality 0.2M45 19:35–20:35: quality 0.5M45 20:35–23:05: quality 0.4M45 23:05–23:35: quality 0.3M45 23:35–23:45: quality 0.2observe M45 21:25–22:20NGC 7000NGC 7000 04:25–04:30: quality 0.4NGC 7000 04:30–04:50: quality 0.5NGC 7000 04:50–05:05: quality 0.6NGC 7000 05:05–05:25: quality 0.7NGC 7000 05:25–05:35: quality 0.8NGC 7000 05:35–06:10: quality 0.4NGC 7000 06:10–06:40: quality 0.1observe NGC 7000 04:25–05:20V1057 CygV1057 Cyg 04:25–04:35: quality 0.4V1057 Cyg 04:35–04:50: quality 0.5V1057 Cyg 04:50–05:05: quality 0.6V1057 Cyg 05:05–05:25: quality 0.7V1057 Cyg 05:25–05:35: quality 0.8V1057 Cyg 05:35–06:10: quality 0.4V1057 Cyg 06:10–06:40: quality 0.1observe V1057 Cyg 05:20–06:10M33M33 18:30–19:05: quality 0.1M33 19:05–19:35: quality 0.3M33 19:35–21:00: quality 0.5M33 21:00–21:25: quality 0.4M33 21:25–21:50: quality 0.3M33 21:50–21:55: quality 0.2observe M33 20:30–21:25scheduleM31M33M45M42NGC 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
18:00–19:35 — nothing worth pointing at — 1.58
19:35–20:30 M31 0.92 0.52
20:30–21:25 M33 0.92 0.44
21:25–22:20 M45 0.92 0.42
22:20–23:20 M42 1.0 0.37
23:20–04:25 — nothing worth pointing at — 5.08
04:25–05:20 NGC 7000 0.92 0.57
05:20–06:10 V1057 Cyg 0.83 0.52
06:10–07:10 — nothing worth pointing at — 1.0

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 15 unknown 19:35–21:30 (marginal) 89.6° at 15:00 62.3° 0.92
M42 Great Orion Nebula 18 unknown 19:35–23:20 (marginal) 42.9° at 19:55 30.1° 1.0
M45 Seven Sisters 22 unknown 19:35–23:20 (marginal) 72.5° at 18:05 25.4° 0.92
NGC 7000 North America Nebula 20 unknown 05:00–05:35 (good) 87.2° at 11:15 97.1° 0.92
V1057 Cyg 20 unknown 05:00–05:35 (good) 87.3° at 11:15 97.2° 0.83
M33 Triangulum Pinwheel 15 unknown 19:35–21:40 (marginal) 79.2° at 15:55 53.8° 0.92
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2040-02-21"

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"}.