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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, 26 February 2026 · astronomical night 19:40 → 05:27 (9.78 h) · Moon 76% (waxing gibbous) · weather: ERA5 history

M31M31 19:00–19:10: quality 0.1M31 19:10–19:40: quality 0.3M31 19:40–19:45: quality 0.2M31 19:45–20:25: quality 0.5M31 20:25–20:50: quality 0.4M31 20:50–21:20: quality 0.3observe M31 19:45–20:30M42M42 19:00–19:10: quality 0.1M42 19:10–19:45: quality 0.2M42 19:45–22:00: quality 0.4M42 22:00–22:55: quality 0.3M42 22:55–23:20: quality 0.2observe M42 22:00–22:35M45M45 19:00–19:10: quality 0.1M45 19:10–19:45: quality 0.2M45 19:45–22:30: quality 0.4M45 22:30–23:00: quality 0.3M45 23:00–23:20: quality 0.2observe M45 21:15–22:00observe M45 22:35–22:45NGC 7000NGC 7000 04:00–04:10: quality 0.2NGC 7000 04:10–04:35: quality 0.3NGC 7000 04:35–05:30: quality 0.4NGC 7000 05:30–06:00: quality 0.2NGC 7000 06:00–06:35: quality 0.1observe NGC 7000 04:25–05:10V1057 CygV1057 Cyg 04:00–04:10: quality 0.2V1057 Cyg 04:10–04:35: quality 0.3V1057 Cyg 04:35–05:30: quality 0.4V1057 Cyg 05:30–06:00: quality 0.2V1057 Cyg 06:00–06:35: quality 0.1observe V1057 Cyg 05:10–05:30M33M33 19:00–19:10: quality 0.1M33 19:10–19:30: quality 0.3M33 19:30–19:45: quality 0.2M33 19:45–20:35: quality 0.5M33 20:35–21:00: quality 0.4M33 21:00–21:25: quality 0.3M33 21:25–21:30: quality 0.2observe M33 20:30–21:15scheduleM31M33M45NGC 700020:0022:0000:0002:0004:0006:00

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
18:05–19:45 — nothing worth pointing at — 1.67
19:45–20:30 M31 0.75 0.48
20:30–21:15 M33 0.75 0.38
21:15–22:00 M45 0.75 0.38
22:00–22:35 M42 0.58 0.33
22:35–22:45 M45 0.17 0.32
22:45–04:25 — nothing worth pointing at — 5.67
04:25–05:10 NGC 7000 0.75 0.39
05:10–05:30 V1057 Cyg 0.33 0.41
05:30–07:00 — nothing worth pointing at — 1.5

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 11 10 19:45–21:05 (marginal) 89.7° at 14:40 72.8° 0.75
M42 Great Orion Nebula 14 13 19:45–22:35 (marginal) 42.9° at 19:30 37.1° 0.58
M45 Seven Sisters 18 17 19:45–22:45 (marginal) 72.5° at 17:45 40.4° 0.92
NGC 7000 North America Nebula 25 15 04:25–05:30 (marginal) 87.2° at 10:50 102.0° 0.75
V1057 Cyg 25 15 04:30–05:30 (marginal) 87.3° at 10:50 102.0° 0.33
M33 Triangulum Pinwheel 12 11 19:45–21:15 (marginal) 79.1° at 15:30 66.8° 0.75
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2026-02-26"

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"}.