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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 Monday, 03 January 2028 · astronomical night 18:42 → 06:08 (11.43 h) · Moon 39% (waxing crescent) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 17:35–18:10: quality 0.1M31 18:10–18:45: quality 0.4M31 18:45–22:05: quality 0.8M31 22:05–23:35: quality 0.7M31 23:35–00:00: quality 0.8M31 00:00–00:15: quality 0.7M31 00:15–00:30: quality 0.6M31 00:30–00:45: quality 0.5M31 00:45–00:55: quality 0.4observe M31 00:10–00:45M42M42 19:20–19:40: quality 0.4M42 19:40–19:55: quality 0.5M42 19:55–20:15: quality 0.6M42 20:15–21:20: quality 0.7M42 21:20–23:35: quality 0.8M42 23:35–00:50: quality 0.9M42 00:50–02:00: quality 0.8M42 02:00–02:15: quality 0.7M42 02:15–02:35: quality 0.6M42 02:35–02:50: quality 0.5M42 02:50–02:55: quality 0.4observe M42 00:45–02:55M45M45 17:35–18:10: quality 0.1M45 18:10–18:45: quality 0.4M45 18:45–21:55: quality 0.8M45 21:55–23:35: quality 0.9M45 23:35–00:00: quality 1.0M45 00:00–01:20: quality 0.9M45 01:20–02:10: quality 0.8M45 02:10–02:20: quality 0.7M45 02:20–02:35: quality 0.6M45 02:35–02:50: quality 0.5M45 02:50–02:55: quality 0.4observe M45 21:10–22:40NGC 7000NGC 7000 17:35–18:10: quality 0.1NGC 7000 18:10–18:45: quality 0.4NGC 7000 18:45–20:15: quality 0.7NGC 7000 20:15–20:40: quality 0.6NGC 7000 20:40–21:00: quality 0.5NGC 7000 21:00–21:20: quality 0.4NGC 7000 21:20–21:25: quality 0.3observe NGC 7000 18:10–19:40V1057 CygV1057 Cyg 17:35–18:10: quality 0.1V1057 Cyg 18:10–18:45: quality 0.4V1057 Cyg 18:45–20:15: quality 0.7V1057 Cyg 20:15–20:40: quality 0.6V1057 Cyg 20:40–21:00: quality 0.5V1057 Cyg 21:00–21:20: quality 0.4V1057 Cyg 21:20–21:25: quality 0.3observe V1057 Cyg 19:40–21:10M33M33 17:35–18:10: quality 0.1M33 18:10–18:45: quality 0.4M33 18:45–19:15: quality 0.7M33 19:15–22:40: quality 0.8M33 22:40–23:35: quality 0.7M33 23:35–00:15: quality 0.8M33 00:15–00:30: quality 0.7M33 00:30–00:45: quality 0.6M33 00:45–01:00: quality 0.5M33 01:00–01:05: quality 0.4observe M33 22:40–00:10scheduleNGC 7000V1057 CygM45M33M4218:0020:0022:0000:0002:0004:0006:00

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
17:00–18:10 — nothing worth pointing at — 1.17
18:10–19:40 NGC 7000 1.5 0.56
19:40–21:10 V1057 Cyg 1.5 0.58
21:10–22:40 M45 1.5 0.85
22:40–00:10 M33 1.5 0.77
00:10–00:45 M31 0.58 0.57
00:45–02:55 M42 2.17 0.72
02:55–07:50 — nothing worth pointing at — 4.92

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 81 unknown 18:45–00:25 (good) 89.7° at 18:15 38.6° 0.58
M42 Great Orion Nebula 88 unknown 20:05–02:25 (good) 42.9° at 23:05 85.7° 2.17
M45 Seven Sisters 98 unknown 18:45–02:30 (good) 72.5° at 21:15 59.2° 1.5
NGC 7000 North America Nebula 33 unknown 18:45–20:25 (good) 87.3° at 14:30 55.5° 1.5
V1057 Cyg 33 unknown 18:45–20:25 (good) 87.3° at 14:30 55.5° 1.5
M33 Triangulum Pinwheel 84 unknown 18:45–00:35 (good) 79.1° at 19:05 35.3° 1.5
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2028-01-03"

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"}.