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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 Saturday, 01 August 2026 · astronomical night 22:32 → 04:23 (5.85 h) · Moon 89% (waning gibbous) · weather: ERA5 history

M31M31 22:45–23:10: quality 0.3M31 23:10–23:40: quality 0.4M31 23:40–04:25: quality 0.5M31 04:25–05:00: quality 0.2M31 05:00–05:10: quality 0.3M31 05:10–05:45: quality 0.1observe M31 00:30–01:50M42M45M45 02:55–03:15: quality 0.3M45 03:15–03:35: quality 0.4M45 03:35–04:25: quality 0.5M45 04:25–05:10: quality 0.3M45 05:10–05:45: quality 0.1observe M45 03:10–04:25NGC 7000NGC 7000 21:15–21:50: quality 0.1NGC 7000 21:50–22:10: quality 0.5NGC 7000 22:10–22:35: quality 0.3NGC 7000 22:35–23:40: quality 0.7NGC 7000 23:40–02:25: quality 0.6NGC 7000 02:25–04:25: quality 0.5NGC 7000 04:25–05:10: quality 0.3NGC 7000 05:10–05:45: quality 0.1observe NGC 7000 21:50–23:10V1057 CygV1057 Cyg 21:15–21:50: quality 0.1V1057 Cyg 21:50–22:10: quality 0.5V1057 Cyg 22:10–22:35: quality 0.3V1057 Cyg 22:35–23:40: quality 0.7V1057 Cyg 23:40–02:25: quality 0.6V1057 Cyg 02:25–04:25: quality 0.5V1057 Cyg 04:25–05:10: quality 0.3V1057 Cyg 05:10–05:45: quality 0.1observe V1057 Cyg 23:10–00:30M33M33 00:15–00:20: quality 0.2M33 00:20–00:50: quality 0.3M33 00:50–02:30: quality 0.4M33 02:30–04:25: quality 0.5M33 04:25–05:10: quality 0.2M33 05:10–05:45: quality 0.1observe M33 01:50–03:10scheduleNGC 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
21:50–23:10 NGC 7000 1.33 0.52
23:10–00:30 V1057 Cyg 1.33 0.64
00:30–01:50 M31 1.33 0.49
01:50–03:10 M33 1.33 0.45
03:10–04:25 M45 1.25 0.46
04:25–06:20 — nothing worth pointing at — 1.92

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 37 37 22:55–04:25 (marginal) 89.5° at 05:20 48.9° 1.33
M42 Great Orion Nebula 0 0 — 42.9° at 10:15 95.1° 0.0
M45 Seven Sisters 12 12 03:05–04:25 (marginal) 72.5° at 08:25 71.6° 1.25
NGC 7000 North America Nebula 69 69 22:35–00:50 (good) 87.2° at 01:40 56.3° 1.33
V1057 Cyg 69 69 22:35–00:50 (good) 87.3° at 01:40 56.2° 1.33
M33 Triangulum Pinwheel 24 24 00:35–04:25 (marginal) 79.1° at 06:15 47.6° 1.33

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2026-08-01"

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"}.