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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, 27 July 2026 · astronomical night 22:40 → 04:15 (5.58 h) · Moon 97% (full moon) · weather: ERA5 history

M31M31 23:05–23:10: quality 0.3M31 23:10–23:30: quality 0.4M31 23:30–23:50: quality 0.5M31 23:50–00:30: quality 0.6M31 00:30–02:00: quality 0.7M31 02:00–04:20: quality 0.8M31 04:20–04:30: quality 0.4M31 04:30–05:00: quality 0.5M31 05:00–05:40: quality 0.1observe M31 00:50–02:15M42M45M45 03:10–03:25: quality 0.4M45 03:25–03:40: quality 0.5M45 03:40–03:55: quality 0.6M45 03:55–04:20: quality 0.7M45 04:20–05:00: quality 0.4M45 05:00–05:40: quality 0.1observe M45 03:40–05:00NGC 7000NGC 7000 21:20–22:00: quality 0.1NGC 7000 22:00–22:45: quality 0.3NGC 7000 22:45–04:20: quality 0.7NGC 7000 04:20–04:30: quality 0.4NGC 7000 04:30–05:00: quality 0.5NGC 7000 05:00–05:40: quality 0.1observe NGC 7000 22:00–23:25V1057 CygV1057 Cyg 21:20–22:00: quality 0.1V1057 Cyg 22:00–22:45: quality 0.3V1057 Cyg 22:45–04:20: quality 0.7V1057 Cyg 04:20–04:30: quality 0.4V1057 Cyg 04:30–05:00: quality 0.5V1057 Cyg 05:00–05:40: quality 0.1observe V1057 Cyg 23:25–00:50M33M33 00:35–00:40: quality 0.3M33 00:40–01:00: quality 0.4M33 01:00–01:15: quality 0.5M33 01:15–01:35: quality 0.6M33 01:35–02:40: quality 0.7M33 02:40–04:05: quality 0.8M33 04:05–04:20: quality 0.9M33 04:20–04:30: quality 0.4M33 04:30–05:00: quality 0.5M33 05:00–05:40: quality 0.1observe M33 02:15–03:40scheduleNGC 7000V1057 CygM31M33M4522:0000:0002:0004:0006:00

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
20:40–22:00 — nothing worth pointing at — 1.33
22:00–23:25 NGC 7000 1.42 0.48
23:25–00:50 V1057 Cyg 1.42 0.67
00:50–02:15 M31 1.42 0.71
02:15–03:40 M33 1.42 0.76
03:40–05:00 M45 1.33 0.54
05:00–06:15 — nothing worth pointing at — 1.25

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 85 84 00:05–04:20 (good) 89.5° at 05:40 101.7° 1.42
M42 Great Orion Nebula 0 0 — 42.9° at 10:35 140.7° 0.0
M45 Seven Sisters 19 19 03:50–04:20 (good) 72.5° at 08:45 133.6° 1.33
NGC 7000 North America Nebula 76 75 22:45–04:20 (good) 87.2° at 02:00 74.5° 1.42
V1057 Cyg 76 75 22:45–04:20 (good) 87.3° at 02:00 74.4° 1.42
M33 Triangulum Pinwheel 66 65 01:25–04:20 (good) 79.1° at 06:35 107.2° 1.42

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2026-07-27"

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"}.