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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, 21 November 2027 · astronomical night 18:33 → 05:40 (11.11 h) · Moon 40% (waning crescent) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 17:30–18:05: quality 0.1M31 18:05–18:35: quality 0.5M31 18:35–00:30: quality 1.0M31 00:30–01:30: quality 0.9M31 01:30–02:45: quality 0.8M31 02:45–03:00: quality 0.7M31 03:00–03:15: quality 0.6M31 03:15–03:35: quality 0.5M31 03:35–03:45: quality 0.4observe M31 22:05–00:05M42M42 22:10–22:15: quality 0.4M42 22:15–22:35: quality 0.5M42 22:35–22:50: quality 0.6M42 22:50–23:05: quality 0.7M42 23:05–00:15: quality 0.8M42 00:15–00:55: quality 0.9M42 00:55–03:20: quality 0.8M42 03:20–04:45: quality 0.7M42 04:45–05:05: quality 0.6M42 05:05–05:25: quality 0.5M42 05:25–05:40: quality 0.4M42 05:40–05:45: quality 0.3observe M42 04:05–05:45M45M45 18:35–18:40: quality 0.4M45 18:40–18:55: quality 0.5M45 18:55–19:05: quality 0.6M45 19:05–19:20: quality 0.7M45 19:20–20:10: quality 0.8M45 20:10–21:30: quality 0.9M45 21:30–00:55: quality 1.0M45 00:55–03:10: quality 0.9M45 03:10–04:30: quality 0.8M45 04:30–05:00: quality 0.7M45 05:00–05:15: quality 0.6M45 05:15–05:30: quality 0.5M45 05:30–05:45: quality 0.4observe M45 02:05–04:05NGC 7000NGC 7000 17:30–18:05: quality 0.2NGC 7000 18:05–18:35: quality 0.5NGC 7000 18:35–20:50: quality 1.0NGC 7000 20:50–22:20: quality 0.9NGC 7000 22:20–23:15: quality 0.8NGC 7000 23:15–23:30: quality 0.7NGC 7000 23:30–23:50: quality 0.6NGC 7000 23:50–00:05: quality 0.5NGC 7000 00:05–00:15: quality 0.4observe NGC 7000 18:05–20:05V1057 CygV1057 Cyg 17:30–18:05: quality 0.2V1057 Cyg 18:05–18:35: quality 0.5V1057 Cyg 18:35–20:50: quality 1.0V1057 Cyg 20:50–22:20: quality 0.9V1057 Cyg 22:20–23:15: quality 0.8V1057 Cyg 23:15–23:30: quality 0.7V1057 Cyg 23:30–23:50: quality 0.6V1057 Cyg 23:50–00:05: quality 0.5V1057 Cyg 00:05–00:15: quality 0.4observe V1057 Cyg 20:05–22:05M33M33 17:30–18:05: quality 0.1M33 18:05–18:15: quality 0.4M33 18:15–18:35: quality 0.5M33 18:35–18:55: quality 0.9M33 18:55–00:55: quality 1.0M33 00:55–01:50: quality 0.9M33 01:50–03:00: quality 0.8M33 03:00–03:15: quality 0.7M33 03:15–03:30: quality 0.6M33 03:30–03:45: quality 0.5M33 03:45–03:55: quality 0.4observe M33 00:05–02:05scheduleNGC 7000V1057 CygM31M33M45M4218:0020:0022:0000:0002:0004:0006:00

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
16:55–18:05 — nothing worth pointing at — 1.17
18:05–20:05 NGC 7000 2.0 0.88
20:05–22:05 V1057 Cyg 2.0 0.93
22:05–00:05 M31 2.0 1.0
00:05–02:05 M33 2.0 0.92
02:05–04:05 M45 2.0 0.86
04:05–05:45 M42 1.67 0.58
05:45–07:20 — nothing worth pointing at — 1.58

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 100 unknown 18:35–03:05 (good) 89.6° at 21:05 126.8° 2.0
M42 Great Orion Nebula 87 unknown 22:40–04:55 (good) 42.9° at 01:55 78.0° 1.67
M45 Seven Sisters 100 unknown 19:00–05:10 (good) 72.5° at 00:05 101.4° 2.0
NGC 7000 North America Nebula 100 unknown 18:35–23:40 (good) 87.2° at 17:20 125.5° 2.0
V1057 Cyg 100 unknown 18:35–23:40 (good) 87.3° at 17:20 125.6° 2.0
M33 Triangulum Pinwheel 100 unknown 18:35–03:20 (good) 79.1° at 21:55 126.4° 2.0
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2027-11-21"

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"}.