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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, 06 September 2031 · astronomical night 21:23 → 05:15 (7.88 h) · Moon 67% (waning gibbous) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 20:25–20:50: quality 0.1M31 20:50–21:15: quality 0.3M31 21:15–21:25: quality 0.4M31 21:25–22:15: quality 0.8M31 22:15–22:40: quality 0.9M31 22:40–01:15: quality 0.7M31 01:15–04:40: quality 0.6M31 04:40–05:20: quality 0.5M31 05:20–05:55: quality 0.3M31 05:55–06:25: quality 0.1observe M31 23:40–01:05M42M42 04:10–04:15: quality 0.2M42 04:15–04:50: quality 0.3M42 04:50–05:20: quality 0.4M42 05:20–05:55: quality 0.2M42 05:55–06:25: quality 0.1observe M42 04:30–05:20M45M45 00:30–00:55: quality 0.3M45 00:55–01:20: quality 0.4M45 01:20–05:20: quality 0.5M45 05:20–05:55: quality 0.2M45 05:55–06:25: quality 0.1observe M45 02:30–03:55NGC 7000NGC 7000 20:15–20:35: quality 0.1NGC 7000 20:35–20:50: quality 0.2NGC 7000 20:50–21:25: quality 0.5NGC 7000 21:25–22:40: quality 1.0NGC 7000 22:40–22:55: quality 0.9NGC 7000 22:55–02:20: quality 0.8NGC 7000 02:20–03:50: quality 0.7NGC 7000 03:50–05:10: quality 0.6NGC 7000 05:10–05:20: quality 0.5NGC 7000 05:20–05:25: quality 0.3NGC 7000 05:25–05:55: quality 0.2NGC 7000 05:55–06:00: quality 0.1observe NGC 7000 20:50–22:15observe NGC 7000 03:55–04:30V1057 CygV1057 Cyg 20:15–20:35: quality 0.1V1057 Cyg 20:35–20:50: quality 0.2V1057 Cyg 20:50–21:25: quality 0.5V1057 Cyg 21:25–22:40: quality 1.0V1057 Cyg 22:40–22:55: quality 0.9V1057 Cyg 22:55–02:20: quality 0.8V1057 Cyg 02:20–03:50: quality 0.7V1057 Cyg 03:50–05:10: quality 0.6V1057 Cyg 05:10–05:20: quality 0.5V1057 Cyg 05:20–05:25: quality 0.3V1057 Cyg 05:25–05:55: quality 0.2V1057 Cyg 05:55–06:00: quality 0.1observe V1057 Cyg 22:15–23:40M33M33 21:55–22:05: quality 0.4M33 22:05–22:20: quality 0.5M33 22:20–22:35: quality 0.6M33 22:35–22:40: quality 0.7M33 22:40–22:50: quality 0.5M33 22:50–02:40: quality 0.6M33 02:40–05:20: quality 0.5M33 05:20–05:55: quality 0.2M33 05:55–06:25: quality 0.1observe M33 01:05–02:30scheduleNGC 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
19:45–20:50 — nothing worth pointing at — 1.08
20:50–22:15 NGC 7000 1.42 0.79
22:15–23:40 V1057 Cyg 1.42 0.89
23:40–01:05 M31 1.42 0.68
01:05–02:30 M33 1.42 0.58
02:30–03:55 M45 1.42 0.5
03:55–04:30 NGC 7000 0.58 0.63
04:30–05:20 M42 0.83 0.37
05:20–06:55 — nothing worth pointing at — 1.58

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 88 unknown 21:25–02:35 (good) 89.5° at 03:00 41.9° 1.42
M42 Great Orion Nebula 6 unknown 04:30–05:20 (marginal) 42.9° at 07:55 39.4° 0.83
M45 Seven Sisters 31 unknown 00:40–05:20 (marginal) 72.5° at 06:05 6.9° 1.42
NGC 7000 North America Nebula 100 unknown 21:25–04:45 (good) 87.2° at 23:20 82.2° 2.0
V1057 Cyg 100 unknown 21:25–04:45 (good) 87.3° at 23:20 82.2° 1.42
M33 Triangulum Pinwheel 68 unknown 22:25–22:40 (good) 79.1° at 03:55 28.6° 1.42
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2031-09-06"

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"}.