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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, 17 June 2025 · astronomical night 23:09 → 03:35 (4.43 h) · Moon 60% (waning gibbous) · weather: ERA5 history

M31M31 01:40–01:50: quality 0.3M31 01:50–02:10: quality 0.4M31 02:10–02:35: quality 0.5M31 02:35–03:40: quality 0.6M31 03:40–04:30: quality 0.3M31 04:30–05:15: quality 0.1observe M31 01:40–03:05M42M45NGC 7000NGC 7000 22:00–22:20: quality 0.1NGC 7000 22:20–22:30: quality 0.2NGC 7000 22:30–23:00: quality 0.3NGC 7000 23:00–23:10: quality 0.4NGC 7000 23:10–23:50: quality 0.8NGC 7000 23:50–01:10: quality 0.9NGC 7000 01:10–01:15: quality 1.0NGC 7000 01:15–03:30: quality 0.8NGC 7000 03:30–03:40: quality 0.7NGC 7000 03:40–04:30: quality 0.4NGC 7000 04:30–05:15: quality 0.1observe NGC 7000 22:50–00:15observe NGC 7000 03:05–03:35observe NGC 7000 03:40–04:30V1057 CygV1057 Cyg 22:00–22:20: quality 0.1V1057 Cyg 22:20–22:30: quality 0.2V1057 Cyg 22:30–23:00: quality 0.3V1057 Cyg 23:00–23:10: quality 0.4V1057 Cyg 23:10–23:50: quality 0.8V1057 Cyg 23:50–01:10: quality 0.9V1057 Cyg 01:10–01:15: quality 1.0V1057 Cyg 01:15–03:30: quality 0.8V1057 Cyg 03:30–03:40: quality 0.7V1057 Cyg 03:40–04:30: quality 0.4V1057 Cyg 04:30–05:15: quality 0.1observe V1057 Cyg 00:15–01:40M33M33 03:15–03:25: quality 0.3M33 03:25–03:40: quality 0.4M33 03:40–03:55: quality 0.2M33 03:55–04:30: quality 0.3M33 04:30–05:15: quality 0.1observe M33 03:35–03:40scheduleNGC 7000V1057 CygM31NGC 7000NGC 700022:0000:0002:0004:00

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
20:55–22:50 — nothing worth pointing at — 1.92
22:50–00:15 NGC 7000 1.42 0.73
00:15–01:40 V1057 Cyg 1.42 0.88
01:40–03:05 M31 1.42 0.49
03:05–03:35 NGC 7000 0.5 0.75
03:35–03:40 M33 0.08 0.41
03:40–04:30 NGC 7000 0.83 0.37
04:30–05:50 — nothing worth pointing at — 1.33

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 22 22 02:45–03:40 (good) 89.6° at 08:20 52.1° 1.42
M42 Great Orion Nebula 0 0 — 42.9° at 13:15 96.0° 0.0
M45 Seven Sisters 0 0 — 72.5° at 11:20 74.0° 0.0
NGC 7000 North America Nebula 95 93 23:10–03:40 (good) 87.3° at 04:35 58.3° 2.75
V1057 Cyg 95 93 23:10–03:40 (good) 87.3° at 04:35 58.2° 1.42
M33 Triangulum Pinwheel 4 4 03:15–03:40 (marginal) 79.1° at 09:10 50.6° 0.08

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2025-06-17"

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"}.