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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.

Try: an autumn deep-sky night  ·  ← previous night · next night →

Night of Sunday, 12 October 2025 · astronomical night 20:16 → 05:58 (9.7 h) · Moon 59% (waning gibbous) · weather: ERA5 history

M31M31 19:15–19:45: quality 0.1M31 19:45–20:00: quality 0.3M31 20:00–20:20: quality 0.2M31 20:20–21:00: quality 0.4M31 00:00–01:00: quality 0.6M31 01:00–02:00: quality 0.7M31 02:00–02:15: quality 0.8M31 02:15–03:00: quality 0.7M31 03:00–04:00: quality 0.5M31 04:00–04:50: quality 0.3M31 04:50–05:00: quality 0.2M31 05:00–06:00: quality 0.1observe M31 00:45–01:35M42M42 01:45–01:50: quality 0.2M42 01:50–02:05: quality 0.3M42 02:05–02:35: quality 0.4M42 02:35–03:00: quality 0.5M42 03:00–04:00: quality 0.4M42 04:00–05:00: quality 0.2M42 05:00–06:00: quality 0.1observe M42 03:15–04:00M45M45 00:00–01:00: quality 0.5M45 01:00–02:00: quality 0.6M45 02:00–02:05: quality 0.7M45 02:05–03:00: quality 0.6M45 03:00–04:00: quality 0.4M45 04:00–05:00: quality 0.2M45 05:00–06:00: quality 0.1observe M45 02:25–03:15NGC 7000NGC 7000 19:15–19:45: quality 0.1NGC 7000 19:45–20:00: quality 0.4NGC 7000 20:00–20:20: quality 0.2NGC 7000 20:20–21:00: quality 0.5NGC 7000 00:00–01:00: quality 0.6NGC 7000 01:00–01:25: quality 0.7NGC 7000 01:25–02:00: quality 0.6NGC 7000 02:00–02:45: quality 0.7NGC 7000 02:45–03:00: quality 0.6NGC 7000 03:00–03:15: quality 0.4NGC 7000 03:15–03:45: quality 0.3NGC 7000 03:45–03:50: quality 0.2observe NGC 7000 19:45–20:00observe NGC 7000 20:20–20:55V1057 CygV1057 Cyg 19:15–19:45: quality 0.1V1057 Cyg 19:45–20:00: quality 0.4V1057 Cyg 20:00–20:20: quality 0.2V1057 Cyg 20:20–21:00: quality 0.5V1057 Cyg 00:00–01:00: quality 0.6V1057 Cyg 01:00–01:25: quality 0.7V1057 Cyg 01:25–02:00: quality 0.6V1057 Cyg 02:00–02:45: quality 0.7V1057 Cyg 02:45–03:00: quality 0.6V1057 Cyg 03:00–03:15: quality 0.4V1057 Cyg 03:15–03:45: quality 0.3V1057 Cyg 03:45–03:50: quality 0.2observe V1057 Cyg 20:55–21:00observe V1057 Cyg 00:00–00:45M33M33 19:40–19:45: quality 0.1M33 19:45–20:00: quality 0.2M33 20:00–20:10: quality 0.1M33 20:10–20:20: quality 0.2M33 20:20–20:25: quality 0.3M33 20:25–21:00: quality 0.4M33 00:00–00:45: quality 0.6M33 00:45–01:00: quality 0.5M33 01:00–01:20: quality 0.7M33 01:20–02:00: quality 0.6M33 02:00–03:00: quality 0.7M33 03:00–04:00: quality 0.5M33 04:00–04:50: quality 0.3M33 04:50–05:00: quality 0.2M33 05:00–06:00: quality 0.1observe M33 01:35–02:25scheduleV1057 CygM31M33M45M4220:0022:0000:0002:0004:0006:00

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
18:40–19:45 — nothing worth pointing at — 1.08
19:45–20:00 NGC 7000 0.25 0.37
20:00–20:20 — nothing worth pointing at — 0.33
20:20–20:55 NGC 7000 0.58 0.47
20:55–21:00 V1057 Cyg 0.08 0.47
21:00–00:00 — nothing worth pointing at — 3.0
00:00–00:45 V1057 Cyg 0.75 0.59
00:45–01:35 M31 0.83 0.63
01:35–02:25 M33 0.83 0.69
02:25–03:15 M45 0.83 0.57
03:15–04:00 M42 0.75 0.36
04:00–07:35 — nothing worth pointing at — 3.58

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 100 41 01:00–03:00 (good) 89.6° at 00:40 71.7° 0.83
M42 Great Orion Nebula 28 15 02:00–04:00 (marginal) 42.9° at 05:30 37.0° 0.75
M45 Seven Sisters 67 33 02:00–03:00 (good) 72.5° at 03:40 39.2° 0.83
NGC 7000 North America Nebula 100 41 01:00–02:55 (good) 87.3° at 20:55 101.2° 0.83
V1057 Cyg 100 41 01:00–02:55 (good) 87.3° at 20:55 101.2° 0.83
M33 Triangulum Pinwheel 96 39 01:00–03:00 (good) 79.1° at 01:30 65.6° 0.83
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2025-10-12"

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"}.