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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 Monday, 09 September 2030 · astronomical night 21:16 → 05:20 (8.05 h) · Moon 95% (waxing gibbous) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 20:30–20:45: quality 0.1M31 20:45–21:20: quality 0.2M31 21:20–23:20: quality 0.5M31 23:20–03:00: quality 0.6M31 03:00–05:10: quality 0.7M31 05:10–05:25: quality 1.0M31 05:25–05:55: quality 0.5M31 05:55–06:30: quality 0.1observe M31 22:50–00:20M42M42 03:55–04:10: quality 0.4M42 04:10–04:25: quality 0.5M42 04:25–04:45: quality 0.6M42 04:45–05:10: quality 0.7M42 05:10–05:25: quality 0.8M42 05:25–05:55: quality 0.4M42 05:55–06:30: quality 0.1observe M42 04:50–05:55M45M45 00:20–00:30: quality 0.3M45 00:30–00:45: quality 0.4M45 00:45–01:05: quality 0.5M45 01:05–01:50: quality 0.6M45 01:50–03:10: quality 0.7M45 03:10–05:10: quality 0.8M45 05:10–05:25: quality 1.0M45 05:25–05:55: quality 0.5M45 05:55–06:30: quality 0.2observe M45 01:50–03:20NGC 7000NGC 7000 20:10–20:45: quality 0.1NGC 7000 20:45–21:20: quality 0.3NGC 7000 21:20–21:35: quality 0.6NGC 7000 21:35–01:50: quality 0.5NGC 7000 01:50–02:10: quality 0.6NGC 7000 02:10–05:10: quality 0.5NGC 7000 05:10–05:15: quality 0.7NGC 7000 05:15–05:25: quality 0.6NGC 7000 05:25–05:45: quality 0.3NGC 7000 05:45–05:55: quality 0.2NGC 7000 05:55–06:00: quality 0.1observe NGC 7000 21:20–22:50V1057 CygV1057 Cyg 20:10–20:45: quality 0.1V1057 Cyg 20:45–21:20: quality 0.3V1057 Cyg 21:20–21:35: quality 0.6V1057 Cyg 21:35–01:50: quality 0.5V1057 Cyg 01:50–02:05: quality 0.6V1057 Cyg 02:05–05:10: quality 0.5V1057 Cyg 05:10–05:15: quality 0.7V1057 Cyg 05:15–05:25: quality 0.6V1057 Cyg 05:25–05:40: quality 0.3V1057 Cyg 05:40–05:55: quality 0.2V1057 Cyg 05:55–06:00: quality 0.1observe V1057 Cyg 03:20–04:50M33M33 21:45–22:10: quality 0.3M33 22:10–22:30: quality 0.4M33 22:30–00:10: quality 0.5M33 00:10–02:30: quality 0.6M33 02:30–05:05: quality 0.7M33 05:05–05:10: quality 0.8M33 05:10–05:25: quality 1.0M33 05:25–05:55: quality 0.5M33 05:55–06:00: quality 0.2M33 06:00–06:30: quality 0.1observe M33 00:20–01:50scheduleNGC 7000M31M33M45V1057 CygM4220:0022:0000:0002:0004:0006:00

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
19:40–21:20 — nothing worth pointing at — 1.67
21:20–22:50 NGC 7000 1.5 0.54
22:50–00:20 M31 1.5 0.56
00:20–01:50 M33 1.5 0.6
01:50–03:20 M45 1.5 0.7
03:20–04:50 V1057 Cyg 1.5 0.55
04:50–05:55 M42 1.08 0.6
05:55–07:00 — nothing worth pointing at — 1.08

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 100 unknown 01:15–05:25 (good) 89.7° at 02:50 66.7° 1.5
M42 Great Orion Nebula 25 unknown 04:35–05:25 (good) 42.9° at 07:40 118.8° 1.08
M45 Seven Sisters 98 unknown 01:15–05:25 (good) 72.5° at 05:55 96.7° 1.5
NGC 7000 North America Nebula 68 unknown 05:10–05:25 (good) 87.2° at 23:05 54.4° 1.5
V1057 Cyg 68 unknown 05:10–05:25 (good) 87.3° at 23:05 54.3° 1.5
M33 Triangulum Pinwheel 100 unknown 01:05–05:25 (good) 79.1° at 03:40 70.1° 1.5
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2030-09-09"

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"}.