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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, 16 January 2031 · astronomical night 18:54 → 06:06 (11.21 h) · Moon 46% (waning crescent) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 17:50–18:25: quality 0.2M31 18:25–18:55: quality 0.5M31 18:55–20:50: quality 1.0M31 20:50–22:15: quality 0.9M31 22:15–23:05: quality 0.8M31 23:05–23:25: quality 0.7M31 23:25–23:40: quality 0.6M31 23:40–23:55: quality 0.5M31 23:55–00:05: quality 0.4observe M31 18:25–19:45M42M42 18:30–18:45: quality 0.2M42 18:45–18:55: quality 0.3M42 18:55–19:10: quality 0.6M42 19:10–19:25: quality 0.7M42 19:25–20:35: quality 0.8M42 20:35–00:00: quality 0.9M42 00:00–01:10: quality 0.8M42 01:10–01:25: quality 0.7M42 01:25–01:35: quality 0.6M42 01:35–01:55: quality 0.5M42 01:55–02:05: quality 0.4observe M42 22:25–02:05M45M45 17:50–18:25: quality 0.1M45 18:25–18:55: quality 0.5M45 18:55–23:10: quality 1.0M45 23:10–00:30: quality 0.9M45 00:30–01:15: quality 0.8M45 01:15–01:30: quality 0.7M45 01:30–01:40: quality 0.6M45 01:40–01:55: quality 0.5M45 01:55–02:05: quality 0.4observe M45 21:05–22:25NGC 7000NGC 7000 17:50–18:25: quality 0.1NGC 7000 18:25–18:55: quality 0.4NGC 7000 18:55–19:35: quality 0.8NGC 7000 19:35–19:50: quality 0.7NGC 7000 19:50–20:05: quality 0.6NGC 7000 20:05–20:25: quality 0.5NGC 7000 20:25–20:35: quality 0.4NGC 7000 06:45–07:15: quality 0.1V1057 CygV1057 Cyg 17:50–18:25: quality 0.1V1057 Cyg 18:25–18:55: quality 0.4V1057 Cyg 18:55–19:35: quality 0.8V1057 Cyg 19:35–19:50: quality 0.7V1057 Cyg 19:50–20:05: quality 0.6V1057 Cyg 20:05–20:25: quality 0.5V1057 Cyg 20:25–20:35: quality 0.4V1057 Cyg 06:45–07:15: quality 0.1M33M33 17:50–18:25: quality 0.2M33 18:25–18:55: quality 0.5M33 18:55–21:15: quality 1.0M33 21:15–22:35: quality 0.9M33 22:35–23:25: quality 0.8M33 23:25–23:40: quality 0.7M33 23:40–23:50: quality 0.6M33 23:50–00:05: quality 0.5M33 00:05–00:15: quality 0.4observe M33 19:45–21:05scheduleM31M33M45M4218:0020:0022:0000:0002:0004:0006:00

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
17:15–18:25 — nothing worth pointing at — 1.17
18:25–19:45 M31 1.33 0.81
19:45–21:05 M33 1.33 0.99
21:05–22:25 M45 1.33 1.0
22:25–02:05 M42 3.67 0.78
02:05–07:45 — nothing worth pointing at — 5.67

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 100 unknown 18:55–23:30 (good) 89.5° at 17:20 149.3° 1.33
M42 Great Orion Nebula 89 unknown 19:00–01:35 (good) 42.9° at 22:15 121.6° 3.67
M45 Seven Sisters 100 unknown 18:55–01:35 (good) 72.5° at 20:25 151.9° 1.33
NGC 7000 North America Nebula 29 unknown 18:55–20:00 (good) 87.2° at 13:40 111.8° 0.0
V1057 Cyg 29 unknown 18:55–20:00 (good) 87.3° at 13:40 111.8° 0.0
M33 Triangulum Pinwheel 100 unknown 18:55–23:45 (good) 79.1° at 18:15 163.5° 1.33

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2031-01-16"

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"}.