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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, 03 August 2026 · astronomical night 22:28 → 04:26 (5.96 h) · Moon 73% (waning gibbous) · weather: ERA5 history

M31M31 22:40–22:45: quality 0.4M31 22:45–22:50: quality 0.5M31 22:50–22:55: quality 0.3M31 22:55–23:20: quality 0.4M31 23:20–04:30: quality 0.5M31 04:30–05:10: quality 0.2M31 05:10–05:50: quality 0.1observe M31 00:40–02:05M42M45M45 02:45–02:50: quality 0.2M45 02:50–03:15: quality 0.3M45 03:15–03:50: quality 0.4M45 03:50–04:30: quality 0.5M45 04:30–05:10: quality 0.2M45 05:10–05:50: quality 0.1observe M45 03:30–04:30NGC 7000NGC 7000 21:10–21:50: quality 0.1NGC 7000 21:50–22:30: quality 0.5NGC 7000 22:30–22:50: quality 1.0NGC 7000 22:50–23:30: quality 0.8NGC 7000 23:30–02:15: quality 0.7NGC 7000 02:15–04:30: quality 0.6NGC 7000 04:30–05:10: quality 0.3NGC 7000 05:10–05:50: quality 0.1observe NGC 7000 21:50–23:15V1057 CygV1057 Cyg 21:10–21:50: quality 0.1V1057 Cyg 21:50–22:30: quality 0.5V1057 Cyg 22:30–22:50: quality 1.0V1057 Cyg 22:50–23:30: quality 0.8V1057 Cyg 23:30–02:15: quality 0.7V1057 Cyg 02:15–04:30: quality 0.6V1057 Cyg 04:30–05:10: quality 0.3V1057 Cyg 05:10–05:50: quality 0.1observe V1057 Cyg 23:15–00:40observe V1057 Cyg 04:30–04:35M33M33 00:10–00:35: quality 0.3M33 00:35–01:00: quality 0.4M33 01:00–04:30: quality 0.5M33 04:30–05:10: quality 0.2M33 05:10–05:50: quality 0.1observe M33 02:05–03:30scheduleNGC 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
20:35–21:50 — nothing worth pointing at — 1.25
21:50–23:15 NGC 7000 1.42 0.68
23:15–00:40 V1057 Cyg 1.42 0.73
00:40–02:05 M31 1.42 0.53
02:05–03:30 M33 1.42 0.47
03:30–04:30 M45 1.0 0.45
04:30–04:35 V1057 Cyg 0.08 0.3
04:35–06:20 — nothing worth pointing at — 1.75

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 42 42 22:40–04:30 (marginal) 89.7° at 05:15 32.3° 1.42
M42 Great Orion Nebula 0 0 — 42.9° at 10:05 73.4° 0.0
M45 Seven Sisters 11 11 03:00–04:30 (marginal) 72.5° at 08:20 45.5° 1.0
NGC 7000 North America Nebula 100 99 22:30–04:30 (good) 87.3° at 01:30 60.3° 1.42
V1057 Cyg 100 99 22:30–04:30 (good) 87.3° at 01:30 60.3° 1.5
M33 Triangulum Pinwheel 26 26 00:20–04:30 (marginal) 79.1° at 06:05 24.3° 1.42

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2026-08-03"

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"}.