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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, 23 September 2045 · astronomical night 20:49 → 05:37 (8.81 h) · Moon 95% (waxing gibbous) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 19:45–20:20: quality 0.1M31 20:20–20:50: quality 0.2M31 20:50–01:00: quality 0.5M31 01:00–03:55: quality 0.6M31 03:55–05:15: quality 0.7M31 05:15–05:20: quality 1.0M31 05:20–05:40: quality 0.9M31 05:40–06:00: quality 0.5M31 06:00–06:15: quality 0.4M31 06:15–06:45: quality 0.1observe M31 00:00–01:35M42M42 03:00–03:05: quality 0.3M42 03:05–03:20: quality 0.4M42 03:20–03:40: quality 0.5M42 03:40–04:00: quality 0.6M42 04:00–05:15: quality 0.7M42 05:15–05:40: quality 0.9M42 05:40–06:15: quality 0.4M42 06:15–06:45: quality 0.1observe M42 04:45–06:15M45M45 23:25–23:40: quality 0.3M45 23:40–00:00: quality 0.4M45 00:00–00:25: quality 0.5M45 00:25–01:55: quality 0.6M45 01:55–03:40: quality 0.7M45 03:40–05:15: quality 0.8M45 05:15–05:40: quality 1.0M45 05:40–06:15: quality 0.5M45 06:15–06:45: quality 0.2observe M45 01:35–03:10NGC 7000NGC 7000 19:45–20:20: quality 0.1NGC 7000 20:20–20:50: quality 0.3NGC 7000 20:50–21:50: quality 0.6NGC 7000 21:50–04:15: quality 0.5NGC 7000 04:15–04:45: quality 0.4NGC 7000 04:45–05:05: quality 0.3observe NGC 7000 20:50–22:25V1057 CygV1057 Cyg 19:45–20:20: quality 0.1V1057 Cyg 20:20–20:50: quality 0.3V1057 Cyg 20:50–21:50: quality 0.6V1057 Cyg 21:50–04:15: quality 0.5V1057 Cyg 04:15–04:45: quality 0.4V1057 Cyg 04:45–05:05: quality 0.3observe V1057 Cyg 22:25–00:00M33M33 20:50–21:20: quality 0.3M33 21:20–21:45: quality 0.4M33 21:45–00:40: quality 0.5M33 00:40–03:50: quality 0.6M33 03:50–05:15: quality 0.7M33 05:15–05:40: quality 1.0M33 05:40–06:15: quality 0.5M33 06:15–06:45: quality 0.1observe M33 03:10–04:45scheduleNGC 7000V1057 CygM31M45M33M4220:0022:0000:0002:0004:0006:00

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
19:15–20:50 — nothing worth pointing at — 1.58
20:50–22:25 NGC 7000 1.58 0.56
22:25–00:00 V1057 Cyg 1.58 0.53
00:00–01:35 M31 1.58 0.55
01:35–03:10 M45 1.58 0.68
03:10–04:45 M33 1.58 0.66
04:45–06:15 M42 1.5 0.66
06:15–07:15 — nothing worth pointing at — 1.0

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 95 unknown 02:45–05:40 (good) 89.7° at 01:55 58.5° 1.58
M42 Great Orion Nebula 45 unknown 03:50–05:40 (good) 42.9° at 06:45 105.9° 1.5
M45 Seven Sisters 100 unknown 01:15–05:40 (good) 72.6° at 04:55 84.2° 1.58
NGC 7000 North America Nebula 58 unknown 20:50–05:00 (marginal) 87.2° at 22:10 56.4° 1.58
V1057 Cyg 58 unknown 20:50–05:00 (marginal) 87.3° at 22:10 56.3° 1.58
M33 Triangulum Pinwheel 99 unknown 02:35–05:40 (good) 79.2° at 02:45 59.3° 1.58
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2045-09-23"

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"}.