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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 Thursday, 09 October 2025 · astronomical night 20:21 → 05:55 (9.57 h) · Moon 89% (waning gibbous) · weather: ERA5 history

M31M31 19:20–19:50: quality 0.1M31 19:50–20:00: quality 0.4M31 20:00–20:25: quality 0.3M31 20:25–21:00: quality 0.6M31 21:00–22:35: quality 0.5M31 22:35–23:00: quality 0.4M31 23:00–23:50: quality 0.5M31 23:50–00:00: quality 0.4M31 00:00–00:05: quality 0.5M31 00:05–03:35: quality 0.4M31 03:35–06:00: quality 0.3M31 06:00–06:30: quality 0.2observe M31 23:00–00:35M42M42 01:55–02:35: quality 0.2M42 02:35–05:30: quality 0.3M42 05:30–06:00: quality 0.4M42 06:00–06:30: quality 0.2M42 06:30–07:00: quality 0.1observe M42 03:20–04:00observe M42 05:00–05:55M45M45 22:20–22:50: quality 0.2M45 22:50–23:15: quality 0.3M45 23:15–23:20: quality 0.4M45 23:20–06:00: quality 0.3M45 06:00–06:30: quality 0.2observe M45 02:10–03:20observe M45 05:55–06:00NGC 7000NGC 7000 19:20–19:50: quality 0.1NGC 7000 19:50–20:00: quality 0.5NGC 7000 20:00–20:25: quality 0.4NGC 7000 20:25–21:00: quality 0.8NGC 7000 21:00–21:05: quality 0.7NGC 7000 21:05–23:00: quality 0.6NGC 7000 23:00–23:55: quality 0.7NGC 7000 23:55–00:00: quality 0.6NGC 7000 00:00–00:05: quality 0.7NGC 7000 00:05–01:40: quality 0.6NGC 7000 01:40–03:00: quality 0.5NGC 7000 03:00–03:30: quality 0.4NGC 7000 03:30–03:55: quality 0.3NGC 7000 03:55–04:00: quality 0.2observe NGC 7000 19:50–21:25V1057 CygV1057 Cyg 19:20–19:50: quality 0.1V1057 Cyg 19:50–20:00: quality 0.5V1057 Cyg 20:00–20:25: quality 0.4V1057 Cyg 20:25–21:00: quality 0.8V1057 Cyg 21:00–21:05: quality 0.7V1057 Cyg 21:05–23:00: quality 0.6V1057 Cyg 23:00–23:55: quality 0.7V1057 Cyg 23:55–00:00: quality 0.6V1057 Cyg 00:00–00:05: quality 0.7V1057 Cyg 00:05–01:40: quality 0.6V1057 Cyg 01:40–03:00: quality 0.5V1057 Cyg 03:00–03:30: quality 0.4V1057 Cyg 03:30–03:55: quality 0.3V1057 Cyg 03:55–04:00: quality 0.2observe V1057 Cyg 21:25–23:00M33M33 19:45–19:50: quality 0.1M33 19:50–20:25: quality 0.2M33 20:25–20:35: quality 0.4M33 20:35–21:00: quality 0.5M33 21:00–01:20: quality 0.4M33 01:20–04:10: quality 0.3M33 04:10–05:00: quality 0.2M33 05:00–06:00: quality 0.3M33 06:00–06:30: quality 0.1observe M33 00:35–02:10scheduleNGC 7000V1057 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
18:45–19:50 — nothing worth pointing at — 1.08
19:50–21:25 NGC 7000 1.58 0.61
21:25–23:00 V1057 Cyg 1.58 0.62
23:00–00:35 M31 1.58 0.46
00:35–02:10 M33 1.58 0.35
02:10–03:20 M45 1.17 0.31
03:20–04:00 M42 0.67 0.31
04:00–05:00 — nothing worth pointing at — 1.0
05:00–05:55 M42 0.92 0.35
05:55–06:00 M45 0.08 0.33
06:00–07:30 — nothing worth pointing at — 1.5

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 57 54 20:25–04:00 (marginal) 89.7° at 00:50 38.5° 1.58
M42 Great Orion Nebula 13 12 05:00–06:00 (marginal) 42.9° at 05:40 42.6° 1.58
M45 Seven Sisters 23 22 23:00–03:20 (marginal) 72.5° at 03:55 4.2° 1.25
NGC 7000 North America Nebula 78 74 20:25–22:45 (good) 87.3° at 21:05 78.5° 1.58
V1057 Cyg 78 74 20:25–22:45 (good) 87.3° at 21:05 78.5° 1.58
M33 Triangulum Pinwheel 46 43 20:25–03:20 (marginal) 79.1° at 01:40 26.2° 1.58
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2025-10-09"

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"}.