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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 Monday, 20 February 2040 · astronomical night 19:32 → 05:36 (10.06 h) · Moon 60% (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 19:35–19:45: quality 0.6M31 19:45–21:00: quality 0.5M31 21:00–21:25: quality 0.4M31 21:25–21:50: quality 0.3observe M31 19:35–20:35M42M42 18:30–19:05: quality 0.1M42 19:05–19:35: quality 0.2M42 19:35–22:55: quality 0.5M42 22:55–23:25: quality 0.4M42 23:25–23:45: quality 0.3observe M42 22:35–23:35M45M45 18:30–19:05: quality 0.1M45 19:05–19:35: quality 0.3M45 19:35–23:00: quality 0.5M45 23:00–23:25: quality 0.4M45 23:25–23:45: quality 0.3observe M45 21:35–22:35observe M45 23:35–23:40NGC 7000NGC 7000 04:25–04:35: quality 0.4NGC 7000 04:35–04:55: quality 0.5NGC 7000 04:55–05:10: quality 0.6NGC 7000 05:10–05:25: quality 0.7NGC 7000 05:25–05:40: quality 0.8NGC 7000 05:40–06:10: quality 0.4NGC 7000 06:10–06:45: quality 0.1observe NGC 7000 04:25–05:25V1057 CygV1057 Cyg 04:30–04:35: quality 0.4V1057 Cyg 04:35–04:55: quality 0.5V1057 Cyg 04:55–05:10: quality 0.6V1057 Cyg 05:10–05:30: quality 0.7V1057 Cyg 05:30–05:40: quality 0.8V1057 Cyg 05:40–06:10: quality 0.4V1057 Cyg 06:10–06:45: quality 0.1observe V1057 Cyg 05:25–06:10M33M33 18:30–19:05: quality 0.1M33 19:05–19:35: quality 0.3M33 19:35–21:10: quality 0.5M33 21:10–21:35: quality 0.4M33 21:35–22:00: quality 0.3observe M33 20:35–21:35scheduleM31M33M45M42NGC 7000V1057 Cyg18:0020:0022:0000:0002:0004:0006:00

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
17:55–19:35 — nothing worth pointing at — 1.67
19:35–20:35 M31 1.0 0.54
20:35–21:35 M33 1.0 0.45
21:35–22:35 M45 1.0 0.5
22:35–23:35 M42 1.0 0.41
23:35–23:40 M45 0.08 0.3
23:40–04:25 — nothing worth pointing at — 4.75
04:25–05:25 NGC 7000 1.0 0.56
05:25–06:10 V1057 Cyg 0.75 0.53
06:10–07:10 — nothing worth pointing at — 1.0

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 17 unknown 19:35–21:40 (marginal) 89.8° at 15:05 53.9° 1.0
M42 Great Orion Nebula 25 unknown 19:35–23:35 (marginal) 42.9° at 19:55 30.5° 1.0
M45 Seven Sisters 30 unknown 19:35–23:40 (marginal) 72.5° at 18:10 14.0° 1.08
NGC 7000 North America Nebula 21 unknown 05:00–05:40 (good) 87.2° at 11:20 91.7° 1.0
V1057 Cyg 20 unknown 05:05–05:40 (good) 87.2° at 11:20 91.8° 0.75
M33 Triangulum Pinwheel 17 unknown 19:35–21:45 (marginal) 79.2° at 15:55 43.6° 1.0
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2040-02-20"

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"}.