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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 Friday, 15 January 2027 · astronomical night 18:53 → 06:07 (11.23 h) · Moon 51% (first quarter) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 17:50–18:25: quality 0.1M31 18:25–18:55: quality 0.3M31 18:55–23:10: quality 0.6M31 23:10–23:35: quality 0.5M31 23:35–23:55: quality 0.4M31 23:55–00:10: quality 0.3M42M42 18:30–18:35: quality 0.1M42 18:35–18:55: quality 0.2M42 18:55–19:05: quality 0.4M42 19:05–19:25: quality 0.5M42 19:25–20:50: quality 0.6M42 20:50–01:05: quality 0.7M42 01:05–01:10: quality 0.8M42 01:10–01:30: quality 0.7M42 01:30–01:45: quality 0.6M42 01:45–02:00: quality 0.5M42 02:00–02:10: quality 0.4observe M42 23:15–02:10M45M45 17:50–18:25: quality 0.1M45 18:25–18:55: quality 0.3M45 18:55–20:10: quality 0.6M45 20:10–01:05: quality 0.7M45 01:05–01:20: quality 0.8M45 01:20–01:35: quality 0.7M45 01:35–01:45: quality 0.6M45 01:45–02:00: quality 0.5M45 02:00–02:05: quality 0.4observe M45 21:55–23:15NGC 7000NGC 7000 17:50–18:25: quality 0.1NGC 7000 18:25–18:55: quality 0.3NGC 7000 18:55–19:40: quality 0.6NGC 7000 19:40–20:00: quality 0.5NGC 7000 20:00–20:25: quality 0.4NGC 7000 20:25–20:35: quality 0.3NGC 7000 06:50–07:15: quality 0.1observe NGC 7000 18:25–19:45V1057 CygV1057 Cyg 17:50–18:25: quality 0.1V1057 Cyg 18:25–18:55: quality 0.3V1057 Cyg 18:55–19:40: quality 0.6V1057 Cyg 19:40–20:00: quality 0.5V1057 Cyg 20:00–20:25: quality 0.4V1057 Cyg 20:25–20:35: quality 0.3V1057 Cyg 06:50–07:15: quality 0.1observe V1057 Cyg 19:45–20:35M33M33 17:50–18:25: quality 0.1M33 18:25–18:55: quality 0.3M33 18:55–23:30: quality 0.6M33 23:30–23:50: quality 0.5M33 23:50–00:10: quality 0.4M33 00:10–00:20: quality 0.3observe M33 20:35–21:55scheduleNGC 7000V1057 CygM33M45M4218:0020:0022:0000:0002:0004:0006:00

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 NGC 7000 1.33 0.49
19:45–20:35 V1057 Cyg 0.83 0.41
20:35–21:55 M33 1.33 0.64
21:55–23:15 M45 1.33 0.7
23:15–02:10 M42 2.92 0.66
02:10–07:50 — nothing worth pointing at — 5.67

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 52 unknown 18:55–21:55 (good) 89.7° at 17:25 28.6° 0.0
M42 Great Orion Nebula 77 unknown 19:45–01:35 (good) 42.9° at 22:15 63.7° 2.92
M45 Seven Sisters 81 unknown 18:55–01:40 (good) 72.5° at 20:30 33.2° 1.33
NGC 7000 North America Nebula 17 unknown 18:55–19:20 (good) 87.2° at 13:40 64.2° 1.33
V1057 Cyg 17 unknown 18:55–19:20 (good) 87.3° at 13:40 64.2° 0.83
M33 Triangulum Pinwheel 55 unknown 18:55–22:50 (good) 79.1° at 18:15 16.0° 1.33

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2027-01-15"

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"}.