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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 Wednesday, 18 February 2026 · astronomical night 19:30 → 05:38 (10.12 h) · Moon 2% (new moon) · weather: ERA5 history

M31M31 18:30–19:00: quality 0.1M31 19:00–19:05: quality 0.5M31 19:05–19:35: quality 0.4M31 19:35–19:55: quality 0.9M31 19:55–20:55: quality 0.8M31 20:55–21:00: quality 0.7M31 21:00–21:20: quality 0.6M31 21:20–21:35: quality 0.5M31 21:35–21:55: quality 0.4observe M31 21:20–21:50M42M42 18:30–19:00: quality 0.1M42 19:00–19:35: quality 0.4M42 19:35–21:00: quality 0.9M42 21:00–22:55: quality 0.8M42 22:55–23:15: quality 0.7M42 23:15–23:30: quality 0.6M42 23:30–23:45: quality 0.5M42 23:45–23:55: quality 0.4observe M42 21:50–23:55M45M45 18:30–19:00: quality 0.1M45 19:00–19:35: quality 0.5M45 19:35–20:50: quality 1.0M45 20:50–21:00: quality 0.9M45 21:00–22:00: quality 0.8M45 22:00–22:05: quality 0.9M45 22:05–23:05: quality 0.8M45 23:05–23:20: quality 0.7M45 23:20–23:30: quality 0.6M45 23:30–23:45: quality 0.5M45 23:45–23:55: quality 0.4observe M45 20:10–21:20NGC 7000NGC 7000 04:35–04:40: quality 0.4NGC 7000 04:40–05:00: quality 0.5NGC 7000 05:00–05:15: quality 0.6NGC 7000 05:15–05:35: quality 0.7NGC 7000 05:35–05:40: quality 0.8NGC 7000 05:40–06:15: quality 0.4NGC 7000 06:15–06:45: quality 0.1observe NGC 7000 04:35–05:45V1057 CygV1057 Cyg 04:35–04:45: quality 0.4V1057 Cyg 04:45–05:00: quality 0.5V1057 Cyg 05:00–05:15: quality 0.6V1057 Cyg 05:15–05:35: quality 0.7V1057 Cyg 05:35–05:40: quality 0.8V1057 Cyg 05:40–06:15: quality 0.4V1057 Cyg 06:15–06:45: quality 0.1observe V1057 Cyg 05:45–06:15M33M33 18:30–19:00: quality 0.1M33 19:00–19:35: quality 0.5M33 19:35–20:15: quality 0.9M33 20:15–21:00: quality 0.8M33 21:00–21:15: quality 0.7M33 21:15–21:35: quality 0.6M33 21:35–21:50: quality 0.5M33 21:50–22:05: quality 0.4observe M33 19:00–20:10scheduleM33M45M42NGC 700018:0020:0022:0000:0002:0004:0006:00

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
17:55–19:00 — nothing worth pointing at — 1.08
19:00–20:10 M33 1.17 0.67
20:10–21:20 M45 1.17 0.93
21:20–21:50 M31 0.5 0.46
21:50–23:55 M42 2.08 0.69
23:55–04:35 — nothing worth pointing at — 4.67
04:35–05:45 NGC 7000 1.17 0.58
05:45–06:15 V1057 Cyg 0.5 0.41
06:15–07:15 — nothing worth pointing at — 1.0

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 44 43 19:35–21:10 (good) 89.6° at 15:10 49.5° 0.5
M42 Great Orion Nebula 83 80 19:35–23:20 (good) 42.9° at 20:05 94.7° 2.08
M45 Seven Sisters 100 97 19:35–23:25 (good) 72.5° at 18:15 71.7° 1.17
NGC 7000 North America Nebula 18 18 05:10–05:40 (good) 87.2° at 11:25 57.1° 1.17
V1057 Cyg 18 18 05:10–05:40 (good) 87.3° at 11:25 57.0° 0.5
M33 Triangulum Pinwheel 51 49 19:35–21:25 (good) 79.1° at 16:00 48.0° 1.17
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2026-02-18"

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"}.