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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, 21 January 2028 · astronomical night 18:59 → 06:05 (11.09 h) · Moon 20% (waning crescent) · weather: none — the schedule is astronomy only; overall conditions unknown

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

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
17:20–18:30 — nothing worth pointing at — 1.17
18:30–19:45 M31 1.25 0.8
19:45–21:00 M33 1.25 0.98
21:00–22:15 M45 1.25 1.0
22:15–01:45 M42 3.5 0.78
01:45–07:45 — nothing worth pointing at — 6.0

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 100 unknown 19:00–23:10 (good) 89.6° at 17:05 131.9° 1.25
M42 Great Orion Nebula 89 unknown 19:00–01:15 (good) 42.9° at 21:55 144.5° 3.5
M45 Seven Sisters 100 unknown 19:00–01:15 (good) 72.5° at 20:05 170.7° 1.25
NGC 7000 North America Nebula 23 unknown 19:00–19:40 (good) 87.3° at 13:20 93.8° 0.0
V1057 Cyg 23 unknown 19:00–19:40 (good) 87.3° at 13:20 93.8° 0.0
M33 Triangulum Pinwheel 100 unknown 19:00–23:25 (good) 79.1° at 17:55 142.0° 1.25

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2028-01-21"

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"}.