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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, 21 October 2027 · astronomical night 20:03 → 06:07 (10.07 h) · Moon 59% (waning gibbous) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 19:00–19:35: quality 0.1M31 19:35–20:00: quality 0.4M31 20:00–20:05: quality 0.5M31 20:05–20:45: quality 0.9M31 20:45–23:10: quality 1.0M31 23:10–00:05: quality 0.9M31 00:05–03:20: quality 0.8M31 03:20–04:50: quality 0.7M31 04:50–05:50: quality 0.6M31 05:50–06:10: quality 0.5M31 06:10–06:45: quality 0.2observe M31 23:15–01:05M42M42 01:10–01:25: quality 0.3M42 01:25–01:50: quality 0.4M42 01:50–06:10: quality 0.5M42 06:10–06:15: quality 0.3M42 06:15–06:45: quality 0.2M42 06:45–07:15: quality 0.1observe M42 04:45–06:10M45M45 21:35–21:40: quality 0.4M45 21:40–21:55: quality 0.5M45 21:55–22:10: quality 0.6M45 22:10–22:25: quality 0.7M45 22:25–23:10: quality 0.8M45 23:10–03:55: quality 0.7M45 03:55–06:10: quality 0.6M45 06:10–06:45: quality 0.3M45 06:45–07:15: quality 0.1observe M45 02:55–04:45NGC 7000NGC 7000 19:00–19:35: quality 0.2NGC 7000 19:35–20:05: quality 0.5NGC 7000 20:05–23:10: quality 1.0NGC 7000 23:10–00:10: quality 0.9NGC 7000 00:10–01:35: quality 0.8NGC 7000 01:35–02:20: quality 0.7NGC 7000 02:20–02:35: quality 0.6NGC 7000 02:35–02:55: quality 0.5NGC 7000 02:55–03:15: quality 0.4observe NGC 7000 19:35–21:25V1057 CygV1057 Cyg 19:00–19:35: quality 0.2V1057 Cyg 19:35–20:05: quality 0.5V1057 Cyg 20:05–23:10: quality 1.0V1057 Cyg 23:10–00:10: quality 0.9V1057 Cyg 00:10–01:35: quality 0.8V1057 Cyg 01:35–02:20: quality 0.7V1057 Cyg 02:20–02:35: quality 0.6V1057 Cyg 02:35–02:55: quality 0.5V1057 Cyg 02:55–03:15: quality 0.4observe V1057 Cyg 21:25–23:15M33M33 19:00–19:35: quality 0.1M33 19:35–19:45: quality 0.3M33 19:45–20:05: quality 0.4M33 20:05–20:40: quality 0.8M33 20:40–22:00: quality 0.9M33 22:00–23:10: quality 1.0M33 23:10–23:30: quality 0.9M33 23:30–03:25: quality 0.8M33 03:25–04:50: quality 0.7M33 04:50–06:05: quality 0.6M33 06:05–06:10: quality 0.5M33 06:10–06:15: quality 0.3M33 06:15–06:45: quality 0.2M33 06:45–06:50: quality 0.1observe M33 01:05–02:55scheduleNGC 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
18:30–19:35 — nothing worth pointing at — 1.08
19:35–21:25 NGC 7000 1.83 0.86
21:25–23:15 V1057 Cyg 1.83 1.0
23:15–01:05 M31 1.83 0.85
01:05–02:55 M33 1.83 0.79
02:55–04:45 M45 1.83 0.65
04:45–06:10 M42 1.42 0.52
06:10–07:45 — nothing worth pointing at — 1.58

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 100 unknown 20:05–05:40 (good) 89.7° at 00:05 80.6° 1.83
M42 Great Orion Nebula 36 unknown 01:15–06:10 (marginal) 42.9° at 04:55 38.6° 1.42
M45 Seven Sisters 85 unknown 22:00–05:35 (good) 72.5° at 03:10 48.0° 1.83
NGC 7000 North America Nebula 100 unknown 20:05–02:30 (good) 87.2° at 20:20 107.9° 1.83
V1057 Cyg 100 unknown 20:05–02:30 (good) 87.3° at 20:20 108.0° 1.83
M33 Triangulum Pinwheel 100 unknown 20:05–05:40 (good) 79.1° at 00:55 74.8° 1.83
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2027-10-21"

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"}.