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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, 04 September 2031 · astronomical night 21:27 → 05:13 (7.77 h) · Moon 84% (waning gibbous) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 20:35–20:55: quality 0.1M31 20:55–21:20: quality 0.3M31 21:20–21:25: quality 0.4M31 21:25–21:30: quality 0.2M31 21:30–01:10: quality 0.5M31 01:10–05:15: quality 0.4M31 05:15–05:50: quality 0.2M31 05:50–06:25: quality 0.1observe M31 23:45–01:10M42M42 04:15–04:25: quality 0.2M42 04:25–04:55: quality 0.3M42 04:55–05:15: quality 0.4M42 05:15–05:50: quality 0.2M42 05:50–06:25: quality 0.1observe M42 04:40–05:15M45M45 00:40–01:00: quality 0.2M45 01:00–02:55: quality 0.3M45 02:55–05:15: quality 0.4M45 05:15–05:50: quality 0.2M45 05:50–06:25: quality 0.1observe M45 02:35–04:00NGC 7000NGC 7000 20:20–20:45: quality 0.1NGC 7000 20:45–20:55: quality 0.2NGC 7000 20:55–21:25: quality 0.5NGC 7000 21:25–21:30: quality 0.4NGC 7000 21:30–22:00: quality 0.8NGC 7000 22:00–00:35: quality 0.7NGC 7000 00:35–03:05: quality 0.6NGC 7000 03:05–05:15: quality 0.5NGC 7000 05:15–05:50: quality 0.2observe NGC 7000 20:55–22:20observe NGC 7000 04:00–04:40V1057 CygV1057 Cyg 20:20–20:45: quality 0.1V1057 Cyg 20:45–20:55: quality 0.2V1057 Cyg 20:55–21:25: quality 0.5V1057 Cyg 21:25–21:30: quality 0.4V1057 Cyg 21:30–22:00: quality 0.8V1057 Cyg 22:00–00:30: quality 0.7V1057 Cyg 00:30–03:05: quality 0.6V1057 Cyg 03:05–05:15: quality 0.5V1057 Cyg 05:15–05:50: quality 0.2observe V1057 Cyg 22:20–23:45M33M33 22:05–22:30: quality 0.3M33 22:30–05:15: quality 0.4M33 05:15–05:50: quality 0.2M33 05:50–06:25: quality 0.1observe M33 01:10–02:35scheduleNGC 7000V1057 CygM31M33M45NGC 700020:0022:0000:0002:0004:0006:00

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
19:45–20:55 — nothing worth pointing at — 1.17
20:55–22:20 NGC 7000 1.42 0.64
22:20–23:45 V1057 Cyg 1.42 0.71
23:45–01:10 M31 1.42 0.48
01:10–02:35 M33 1.42 0.41
02:35–04:00 M45 1.42 0.35
04:00–04:40 NGC 7000 0.67 0.5
04:40–05:15 M42 0.58 0.36
05:15–06:55 — nothing worth pointing at — 1.67

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 49 unknown 21:30–05:15 (marginal) 89.7° at 03:10 31.4° 1.42
M42 Great Orion Nebula 5 unknown 04:40–05:15 (marginal) 42.9° at 08:00 60.4° 0.58
M45 Seven Sisters 16 unknown 01:20–05:15 (marginal) 72.5° at 06:15 31.1° 1.42
NGC 7000 North America Nebula 77 unknown 21:30–02:15 (good) 87.2° at 23:25 67.7° 2.08
V1057 Cyg 77 unknown 21:30–02:15 (good) 87.3° at 23:25 67.6° 1.42
M33 Triangulum Pinwheel 34 unknown 22:20–05:15 (marginal) 79.1° at 04:00 18.0° 1.42
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2031-09-04"

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"}.