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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, 27 February 2026 · astronomical night 19:41 → 05:25 (9.74 h) · Moon 85% (waxing gibbous) · weather: ERA5 history

M31M31 18:40–19:10: quality 0.1M31 19:10–19:45: quality 0.3M31 19:45–20:25: quality 0.5M31 20:25–20:50: quality 0.4M31 20:50–21:00: quality 0.3M31 21:00–21:15: quality 0.1observe M31 19:45–20:20M42M42 18:40–19:10: quality 0.1M42 19:10–19:45: quality 0.2M42 19:45–20:25: quality 0.4M42 20:25–21:00: quality 0.3M42 21:00–22:00: quality 0.1M42 23:00–23:15: quality 0.2M45M45 18:40–19:10: quality 0.1M45 19:10–19:15: quality 0.3M45 19:15–19:45: quality 0.2M45 19:45–20:00: quality 0.5M45 20:00–21:00: quality 0.4M45 21:00–22:00: quality 0.1M45 23:00–23:15: quality 0.2observe M45 20:55–21:00NGC 7000NGC 7000 04:00–04:20: quality 0.4NGC 7000 04:20–04:40: quality 0.5NGC 7000 04:40–04:55: quality 0.6NGC 7000 04:55–05:00: quality 0.7NGC 7000 05:00–05:05: quality 0.6NGC 7000 05:05–05:30: quality 0.7NGC 7000 05:30–06:00: quality 0.4NGC 7000 06:00–06:30: quality 0.1observe NGC 7000 04:00–04:35V1057 CygV1057 Cyg 04:00–04:20: quality 0.4V1057 Cyg 04:20–04:40: quality 0.5V1057 Cyg 04:40–05:05: quality 0.6V1057 Cyg 05:05–05:30: quality 0.7V1057 Cyg 05:30–06:00: quality 0.4V1057 Cyg 06:00–06:30: quality 0.1observe V1057 Cyg 04:35–06:00M33M33 18:40–19:10: quality 0.1M33 19:10–19:45: quality 0.3M33 19:45–20:40: quality 0.5M33 20:40–21:00: quality 0.4M33 21:00–21:30: quality 0.1observe M33 20:20–20:55scheduleV1057 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
18:05–19:45 — nothing worth pointing at — 1.67
19:45–20:20 M31 0.58 0.52
20:20–20:55 M33 0.58 0.45
20:55–21:00 M45 0.08 0.41
21:00–04:00 — nothing worth pointing at — 7.0
04:00–04:35 NGC 7000 0.58 0.44
04:35–06:00 V1057 Cyg 1.42 0.55
06:00–07:00 — nothing worth pointing at — 1.0

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 12 11 19:45–21:00 (marginal) 89.7° at 14:35 85.0° 0.58
M42 Great Orion Nebula 13 7 19:45–21:00 (marginal) 42.9° at 19:25 44.2° 0.0
M45 Seven Sisters 19 11 19:45–21:00 (marginal) 72.5° at 17:40 54.4° 0.08
NGC 7000 North America Nebula 24 23 04:50–05:30 (good) 87.2° at 10:50 108.9° 0.58
V1057 Cyg 24 23 04:50–05:30 (good) 87.3° at 10:50 109.0° 1.42
M33 Triangulum Pinwheel 14 12 19:45–21:00 (marginal) 79.1° at 15:25 80.4° 0.58

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2026-02-27"

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"}.