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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 August 2031 · astronomical night 22:18 → 04:35 (6.29 h) · Moon 51% (last quarter) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 22:15–22:20: quality 0.2M31 22:20–22:25: quality 0.4M31 22:25–22:40: quality 0.5M31 22:40–22:55: quality 0.6M31 22:55–23:10: quality 0.7M31 23:10–00:05: quality 0.8M31 00:05–04:40: quality 0.7M31 04:40–05:20: quality 0.3M31 05:20–05:55: quality 0.1observe M31 00:50–02:25M42M45M45 02:20–02:35: quality 0.3M45 02:35–02:55: quality 0.4M45 02:55–03:30: quality 0.5M45 03:30–04:40: quality 0.6M45 04:40–05:20: quality 0.3M45 05:20–05:55: quality 0.1observe M45 04:00–04:40NGC 7000NGC 7000 21:05–21:40: quality 0.1NGC 7000 21:40–22:20: quality 0.5NGC 7000 22:20–00:05: quality 1.0NGC 7000 00:05–01:35: quality 0.9NGC 7000 01:35–04:40: quality 0.8NGC 7000 04:40–05:20: quality 0.4NGC 7000 05:20–05:55: quality 0.1observe NGC 7000 21:40–23:15V1057 CygV1057 Cyg 21:05–21:40: quality 0.1V1057 Cyg 21:40–22:20: quality 0.5V1057 Cyg 22:20–00:05: quality 1.0V1057 Cyg 00:05–01:35: quality 0.9V1057 Cyg 01:35–04:40: quality 0.8V1057 Cyg 04:40–05:20: quality 0.4V1057 Cyg 05:20–05:55: quality 0.1observe V1057 Cyg 23:15–00:50observe V1057 Cyg 04:40–05:20M33M33 23:45–23:55: quality 0.4M33 23:55–00:05: quality 0.5M33 00:05–00:10: quality 0.4M33 00:10–00:30: quality 0.5M33 00:30–02:05: quality 0.6M33 02:05–04:20: quality 0.7M33 04:20–04:40: quality 0.6M33 04:40–05:20: quality 0.3M33 05:20–05:55: quality 0.1observe M33 02:25–04:00scheduleNGC 7000V1057 CygM31M33M45V1057 Cyg22:0000:0002:0004:0006:00

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
20:25–21:40 — nothing worth pointing at — 1.25
21:40–23:15 NGC 7000 1.58 0.78
23:15–00:50 V1057 Cyg 1.58 0.94
00:50–02:25 M31 1.58 0.72
02:25–04:00 M33 1.58 0.67
04:00–04:40 M45 0.67 0.57
04:40–05:20 V1057 Cyg 0.67 0.36
05:20–06:25 — nothing worth pointing at — 1.08

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 85 unknown 22:50–04:40 (good) 89.5° at 04:50 36.9° 1.58
M42 Great Orion Nebula 0 unknown — 42.9° at 09:45 45.8° 0.0
M45 Seven Sisters 21 unknown 02:25–04:40 (marginal) 72.5° at 07:55 14.0° 0.67
NGC 7000 North America Nebula 100 unknown 22:20–04:40 (good) 87.2° at 01:10 77.1° 1.58
V1057 Cyg 100 unknown 22:20–04:40 (good) 87.3° at 01:10 77.1° 2.25
M33 Triangulum Pinwheel 56 unknown 00:40–04:40 (good) 79.1° at 05:45 22.6° 1.58

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2031-08-09"

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"}.