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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 Tuesday, 31 August 2027 · astronomical night 21:35 → 05:07 (7.54 h) · Moon 0% (new moon) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 20:50–21:00: quality 0.1M31 21:00–21:05: quality 0.2M31 21:05–21:40: quality 0.3M31 21:40–21:45: quality 0.7M31 21:45–22:40: quality 0.8M31 22:40–00:05: quality 0.9M31 00:05–05:10: quality 1.0M31 05:10–05:45: quality 0.5M31 05:45–06:10: quality 0.2M31 06:10–06:20: quality 0.1observe M31 00:00–01:30M42M42 04:30–04:40: quality 0.4M42 04:40–04:55: quality 0.5M42 04:55–05:10: quality 0.6M42 05:10–05:20: quality 0.3M42 05:20–05:45: quality 0.4M42 05:45–06:20: quality 0.1observe M42 04:30–05:45M45M45 00:55–01:00: quality 0.4M45 01:00–01:15: quality 0.5M45 01:15–01:30: quality 0.6M45 01:30–01:45: quality 0.7M45 01:45–02:30: quality 0.8M45 02:30–03:50: quality 0.9M45 03:50–05:10: quality 1.0M45 05:10–05:45: quality 0.5M45 05:45–06:20: quality 0.2observe M45 03:00–04:30NGC 7000NGC 7000 20:30–21:00: quality 0.1NGC 7000 21:00–21:40: quality 0.5NGC 7000 21:40–03:10: quality 1.0NGC 7000 03:10–04:40: quality 0.9NGC 7000 04:40–05:10: quality 0.8NGC 7000 05:10–05:45: quality 0.4NGC 7000 05:45–06:20: quality 0.1observe NGC 7000 21:00–22:30V1057 CygV1057 Cyg 20:30–21:00: quality 0.1V1057 Cyg 21:00–21:40: quality 0.5V1057 Cyg 21:40–03:10: quality 1.0V1057 Cyg 03:10–04:40: quality 0.9V1057 Cyg 04:40–05:10: quality 0.8V1057 Cyg 05:10–05:45: quality 0.4V1057 Cyg 05:45–06:20: quality 0.1observe V1057 Cyg 22:30–00:00M33M33 22:20–22:30: quality 0.4M33 22:30–22:40: quality 0.5M33 22:40–22:55: quality 0.6M33 22:55–23:10: quality 0.7M33 23:10–00:00: quality 0.8M33 00:00–01:20: quality 0.9M33 01:20–05:10: quality 1.0M33 05:10–05:45: quality 0.5M33 05:45–06:20: quality 0.2observe M33 01:30–03:00scheduleNGC 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
19:55–21:00 — nothing worth pointing at — 1.08
21:00–22:30 NGC 7000 1.5 0.78
22:30–00:00 V1057 Cyg 1.5 1.0
00:00–01:30 M31 1.5 0.99
01:30–03:00 M33 1.5 0.99
03:00–04:30 M45 1.5 0.94
04:30–05:45 M42 1.25 0.45
05:45–06:50 — nothing worth pointing at — 1.08

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 100 unknown 21:40–05:10 (good) 89.7° at 03:25 126.5° 1.5
M42 Great Orion Nebula 10 unknown 05:05–05:10 (good) 42.9° at 08:15 78.3° 1.25
M45 Seven Sisters 100 unknown 01:25–05:10 (good) 72.5° at 06:30 101.4° 1.5
NGC 7000 North America Nebula 100 unknown 21:40–05:10 (good) 87.2° at 23:40 125.1° 1.5
V1057 Cyg 100 unknown 21:40–05:10 (good) 87.3° at 23:40 125.1° 1.5
M33 Triangulum Pinwheel 100 unknown 22:50–05:10 (good) 79.1° at 04:15 126.3° 1.5
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2027-08-31"

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"}.