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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, 09 September 2028 · astronomical night 21:15 → 05:20 (8.08 h) · Moon 71% (waning gibbous) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 20:10–20:45: quality 0.1M31 20:45–21:00: quality 0.3M31 21:00–21:20: quality 0.4M31 21:20–21:55: quality 0.8M31 21:55–02:10: quality 0.6M31 02:10–05:25: quality 0.5M31 05:25–06:00: quality 0.2M31 06:00–06:30: quality 0.1observe M31 23:45–01:15M42M42 03:55–04:05: quality 0.2M42 04:05–04:35: quality 0.3M42 04:35–05:25: quality 0.4M42 05:25–06:00: quality 0.2M42 06:00–06:30: quality 0.1observe M42 04:45–05:25M45M45 00:15–00:20: quality 0.2M45 00:20–00:45: quality 0.3M45 00:45–01:40: quality 0.4M45 01:40–05:15: quality 0.5M45 05:15–05:25: quality 0.4M45 05:25–06:00: quality 0.2M45 06:00–06:30: quality 0.1observe M45 02:45–04:15NGC 7000NGC 7000 20:10–20:20: quality 0.1NGC 7000 20:20–20:45: quality 0.2NGC 7000 20:45–21:20: quality 0.5NGC 7000 21:20–21:55: quality 1.0NGC 7000 21:55–01:05: quality 0.8NGC 7000 01:05–03:00: quality 0.7NGC 7000 03:00–04:45: quality 0.6NGC 7000 04:45–05:15: quality 0.5NGC 7000 05:15–05:25: quality 0.4NGC 7000 05:25–05:50: quality 0.2NGC 7000 05:50–06:00: quality 0.1observe NGC 7000 20:45–22:15observe NGC 7000 04:15–04:45V1057 CygV1057 Cyg 20:10–20:20: quality 0.1V1057 Cyg 20:20–20:45: quality 0.2V1057 Cyg 20:45–21:20: quality 0.5V1057 Cyg 21:20–21:55: quality 1.0V1057 Cyg 21:55–01:05: quality 0.8V1057 Cyg 01:05–03:00: quality 0.7V1057 Cyg 03:00–04:45: quality 0.6V1057 Cyg 04:45–05:15: quality 0.5V1057 Cyg 05:15–05:25: quality 0.4V1057 Cyg 05:25–05:50: quality 0.2V1057 Cyg 05:50–06:00: quality 0.1observe V1057 Cyg 22:15–23:45M33M33 21:40–21:50: quality 0.4M33 21:50–21:55: quality 0.5M33 21:55–22:15: quality 0.4M33 22:15–23:00: quality 0.5M33 23:00–01:25: quality 0.6M33 01:25–05:15: quality 0.5M33 05:15–05:25: quality 0.4M33 05:25–06:00: quality 0.2M33 06:00–06:30: quality 0.1observe M33 01:15–02:45scheduleNGC 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
19:40–20:45 — nothing worth pointing at — 1.08
20:45–22:15 NGC 7000 1.5 0.77
22:15–23:45 V1057 Cyg 1.5 0.81
23:45–01:15 M31 1.5 0.62
01:15–02:45 M33 1.5 0.53
02:45–04:15 M45 1.5 0.46
04:15–04:45 NGC 7000 0.5 0.56
04:45–05:25 M42 0.67 0.41
05:25–07:00 — nothing worth pointing at — 1.58

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 84 unknown 21:20–00:55 (good) 89.5° at 02:45 37.4° 1.5
M42 Great Orion Nebula 7 unknown 04:20–05:25 (marginal) 42.9° at 07:40 43.7° 0.67
M45 Seven Sisters 28 unknown 00:30–05:25 (marginal) 72.5° at 05:50 6.5° 1.5
NGC 7000 North America Nebula 100 unknown 21:20–03:50 (good) 87.2° at 23:05 77.7° 2.0
V1057 Cyg 100 unknown 21:20–03:50 (good) 87.3° at 23:05 77.7° 1.5
M33 Triangulum Pinwheel 55 unknown 21:40–05:25 (marginal) 79.1° at 03:40 24.6° 1.5
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2028-09-09"

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"}.