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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 Tuesday, 04 August 2026 · astronomical night 22:26 → 04:27 (6.01 h) · Moon 63% (waning gibbous) · weather: ERA5 history

M31M31 22:35–22:50: quality 0.4M31 22:50–23:05: quality 0.5M31 23:05–23:15: quality 0.6M31 23:15–00:00: quality 0.5M31 00:00–03:55: quality 0.6M31 03:55–04:30: quality 0.5M31 04:30–05:10: quality 0.3M31 05:10–05:50: quality 0.1observe M31 00:45–02:15M42M45M45 02:40–02:45: quality 0.2M45 02:45–03:10: quality 0.3M45 03:10–03:35: quality 0.4M45 03:35–04:30: quality 0.5M45 04:30–05:10: quality 0.2M45 05:10–05:50: quality 0.1observe M45 03:45–04:30NGC 7000NGC 7000 21:10–21:45: quality 0.1NGC 7000 21:45–22:30: quality 0.4NGC 7000 22:30–23:15: quality 0.9NGC 7000 23:15–23:40: quality 0.8NGC 7000 23:40–00:00: quality 0.7NGC 7000 00:00–00:15: quality 0.8NGC 7000 00:15–01:00: quality 0.7NGC 7000 01:00–01:05: quality 0.8NGC 7000 01:05–04:30: quality 0.7NGC 7000 04:30–05:10: quality 0.3NGC 7000 05:10–05:50: quality 0.1observe NGC 7000 21:45–23:15V1057 CygV1057 Cyg 21:10–21:45: quality 0.1V1057 Cyg 21:45–22:30: quality 0.4V1057 Cyg 22:30–23:15: quality 0.9V1057 Cyg 23:15–23:40: quality 0.8V1057 Cyg 23:40–00:00: quality 0.7V1057 Cyg 00:00–00:15: quality 0.8V1057 Cyg 00:15–01:00: quality 0.7V1057 Cyg 01:00–01:05: quality 0.8V1057 Cyg 01:05–04:30: quality 0.7V1057 Cyg 04:30–05:10: quality 0.3V1057 Cyg 05:10–05:50: quality 0.1observe V1057 Cyg 23:15–00:45observe V1057 Cyg 04:30–05:10M33M33 00:05–00:25: quality 0.3M33 00:25–00:50: quality 0.4M33 00:50–03:20: quality 0.5M33 03:20–03:55: quality 0.6M33 03:55–04:30: quality 0.5M33 04:30–05:10: quality 0.3M33 05:10–05:50: quality 0.1observe M33 02:15–03:45scheduleNGC 7000V1057 CygM31M33M45V1057 Cyg22:0000:0002:0004:0006:00

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
20:35–21:45 — nothing worth pointing at — 1.17
21:45–23:15 NGC 7000 1.5 0.67
23:15–00:45 V1057 Cyg 1.5 0.75
00:45–02:15 M31 1.5 0.58
02:15–03:45 M33 1.5 0.54
03:45–04:30 M45 0.75 0.46
04:30–05:10 V1057 Cyg 0.67 0.32
05:10–06:20 — nothing worth pointing at — 1.17

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 58 56 22:35–04:30 (marginal) 89.7° at 05:10 28.9° 1.5
M42 Great Orion Nebula 0 0 — 42.9° at 10:00 62.6° 0.0
M45 Seven Sisters 11 11 02:55–04:30 (marginal) 72.5° at 08:15 32.0° 0.75
NGC 7000 North America Nebula 100 95 22:30–04:30 (good) 87.2° at 01:25 65.0° 1.5
V1057 Cyg 100 95 22:30–04:30 (good) 87.3° at 01:25 65.0° 2.17
M33 Triangulum Pinwheel 35 34 00:15–04:30 (marginal) 79.1° at 06:00 15.9° 1.5

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2026-08-04"

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"}.