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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 Sunday, 29 August 2027 · astronomical night 21:39 → 05:05 (7.43 h) · Moon 5% (waning crescent) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 20:55–21:05: quality 0.1M31 21:05–21:15: quality 0.2M31 21:15–21:40: quality 0.3M31 21:40–21:55: quality 0.7M31 21:55–22:45: quality 0.8M31 22:45–00:15: quality 0.9M31 00:15–05:10: quality 1.0M31 05:10–05:45: quality 0.5M31 05:45–06:20: quality 0.1observe M31 00:05–01:35M42M42 04:40–04:45: quality 0.4M42 04:45–05:05: quality 0.5M42 05:05–05:10: quality 0.6M42 05:10–05:30: quality 0.3M42 05:30–05:45: quality 0.4M42 05:45–06:20: quality 0.1observe M42 04:40–05:45M45M45 01:05–01:10: quality 0.4M45 01:10–01:25: quality 0.5M45 01:25–01:40: quality 0.6M45 01:40–01:50: quality 0.7M45 01:50–02:40: quality 0.8M45 02:40–04:00: quality 0.9M45 04:00–05:10: quality 1.0M45 05:10–05:45: quality 0.5M45 05:45–06:20: quality 0.1observe M45 03:05–04:40NGC 7000NGC 7000 20:30–21:05: quality 0.1NGC 7000 21:05–21:40: quality 0.5NGC 7000 21:40–03:20: quality 1.0NGC 7000 03:20–04:50: quality 0.9NGC 7000 04:50–05:10: quality 0.8NGC 7000 05:10–05:45: quality 0.4NGC 7000 05:45–06:20: quality 0.1observe NGC 7000 21:05–22:35V1057 CygV1057 Cyg 20:30–21:05: quality 0.1V1057 Cyg 21:05–21:40: quality 0.5V1057 Cyg 21:40–03:20: quality 1.0V1057 Cyg 03:20–04:50: quality 0.9V1057 Cyg 04:50–05:10: quality 0.8V1057 Cyg 05:10–05:45: quality 0.4V1057 Cyg 05:45–06:20: quality 0.1observe V1057 Cyg 22:35–00:05M33M33 22:30–22:35: quality 0.4M33 22:35–22:50: quality 0.5M33 22:50–23:05: quality 0.6M33 23:05–23:20: quality 0.7M33 23:20–00:05: quality 0.8M33 00:05–01:25: quality 0.9M33 01:25–05:10: quality 1.0M33 05:10–05:45: quality 0.5M33 05:45–06:20: quality 0.1observe M33 01:35–03:05scheduleNGC 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
19:55–21:05 — nothing worth pointing at — 1.17
21:05–22:35 NGC 7000 1.5 0.81
22:35–00:05 V1057 Cyg 1.5 1.0
00:05–01:35 M31 1.5 0.98
01:35–03:05 M33 1.5 0.99
03:05–04:40 M45 1.58 0.94
04:40–05:45 M42 1.08 0.41
05:45–06:45 — nothing worth pointing at — 1.0

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 100 unknown 21:40–05:10 (good) 89.6° at 03:35 100.9° 1.5
M42 Great Orion Nebula 7 unknown 04:40–05:45 (marginal) 42.9° at 08:25 54.1° 1.08
M45 Seven Sisters 96 unknown 01:30–05:10 (good) 72.5° at 06:35 71.3° 1.58
NGC 7000 North America Nebula 100 unknown 21:40–05:10 (good) 87.3° at 23:50 118.1° 1.5
V1057 Cyg 100 unknown 21:40–05:10 (good) 87.3° at 23:50 118.2° 1.5
M33 Triangulum Pinwheel 100 unknown 22:55–05:10 (good) 79.1° at 04:25 97.3° 1.5
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2027-08-29"

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"}.