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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, 15 July 2025 · astronomical night 22:57 → 03:57 (5.01 h) · Moon 73% (waning gibbous) · weather: ERA5 history

M31M31 23:50–00:15: quality 0.3M31 00:15–00:40: quality 0.4M31 00:40–04:00: quality 0.5M31 04:00–04:50: quality 0.3M31 04:50–05:30: quality 0.1observe M31 01:10–02:40M42M45M45 04:00–04:10: quality 0.1M45 04:10–04:50: quality 0.2M45 04:50–05:30: quality 0.1NGC 7000NGC 7000 21:30–22:10: quality 0.1NGC 7000 22:10–23:00: quality 0.4NGC 7000 23:00–23:15: quality 0.8NGC 7000 23:15–23:40: quality 0.9NGC 7000 23:40–01:00: quality 0.7NGC 7000 01:00–02:00: quality 0.6NGC 7000 02:00–02:35: quality 0.7NGC 7000 02:35–04:00: quality 0.6NGC 7000 04:00–04:50: quality 0.3NGC 7000 04:50–05:30: quality 0.1observe NGC 7000 22:10–23:40V1057 CygV1057 Cyg 21:30–22:10: quality 0.1V1057 Cyg 22:10–23:00: quality 0.4V1057 Cyg 23:00–23:15: quality 0.8V1057 Cyg 23:15–23:40: quality 0.9V1057 Cyg 23:40–01:00: quality 0.7V1057 Cyg 01:00–02:00: quality 0.6V1057 Cyg 02:00–02:35: quality 0.7V1057 Cyg 02:35–04:00: quality 0.6V1057 Cyg 04:00–04:50: quality 0.3V1057 Cyg 04:50–05:30: quality 0.1observe V1057 Cyg 23:40–01:10M33M33 01:25–01:30: quality 0.2M33 01:30–01:55: quality 0.3M33 01:55–02:15: quality 0.4M33 02:15–04:00: quality 0.5M33 04:00–04:50: quality 0.2M33 04:50–05:30: quality 0.1observe M33 02:40–04:00scheduleNGC 7000V1057 CygM31M3322:0000:0002:0004:0006:00

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
20:50–22:10 — nothing worth pointing at — 1.33
22:10–23:40 NGC 7000 1.5 0.59
23:40–01:10 V1057 Cyg 1.5 0.68
01:10–02:40 M31 1.5 0.51
02:40–04:00 M33 1.33 0.47
04:00–06:05 — nothing worth pointing at — 2.08

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 36 33 00:00–04:00 (marginal) 89.6° at 06:30 44.0° 1.5
M42 Great Orion Nebula 0 0 — 42.9° at 11:20 87.2° 0.0
M45 Seven Sisters 1 1 — 72.5° at 09:30 63.3° 0.0
NGC 7000 North America Nebula 97 88 23:00–03:00 (good) 87.3° at 02:45 58.5° 1.5
V1057 Cyg 97 88 23:00–03:00 (good) 87.3° at 02:45 58.4° 1.5
M33 Triangulum Pinwheel 19 18 01:40–04:00 (marginal) 79.1° at 07:20 40.6° 1.33

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2025-07-15"

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"}.