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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 Tuesday, 04 January 2039 · astronomical night 18:43 → 06:08 (11.42 h) · Moon 74% (waxing gibbous) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 17:35–18:10: quality 0.1M31 18:10–18:45: quality 0.3M31 18:45–23:50: quality 0.5M31 23:50–00:20: quality 0.4M31 00:20–00:50: quality 0.3observe M31 21:10–22:40M42M42 19:15–19:25: quality 0.2M42 19:25–19:55: quality 0.3M42 19:55–21:10: quality 0.4M42 21:10–01:05: quality 0.5M42 01:05–01:45: quality 0.6M42 01:45–02:15: quality 0.5M42 02:15–02:40: quality 0.4M42 02:40–02:50: quality 0.3observe M42 22:40–00:05observe M42 00:45–01:15observe M42 02:45–02:50M45M45 17:35–18:10: quality 0.1M45 18:10–18:45: quality 0.2M45 18:45–18:55: quality 0.4M45 18:55–02:15: quality 0.5M45 02:15–02:35: quality 0.4M45 02:35–02:50: quality 0.3observe M45 01:15–02:45NGC 7000NGC 7000 17:35–18:10: quality 0.1NGC 7000 18:10–18:45: quality 0.3NGC 7000 18:45–20:15: quality 0.6NGC 7000 20:15–20:35: quality 0.5NGC 7000 20:35–21:00: quality 0.4NGC 7000 21:00–21:20: quality 0.3observe NGC 7000 18:10–19:40V1057 CygV1057 Cyg 17:35–18:10: quality 0.1V1057 Cyg 18:10–18:45: quality 0.3V1057 Cyg 18:45–20:15: quality 0.6V1057 Cyg 20:15–20:35: quality 0.5V1057 Cyg 20:35–21:00: quality 0.4V1057 Cyg 21:00–21:20: quality 0.3observe V1057 Cyg 19:40–21:10M33M33 17:35–18:10: quality 0.1M33 18:10–18:45: quality 0.2M33 18:45–22:30: quality 0.5M33 22:30–00:30: quality 0.4M33 00:30–01:00: quality 0.3observe M33 00:05–00:45scheduleNGC 7000V1057 CygM31M42M4518:0020:0022:0000:0002:0004:0006:00

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 0.49
19:40–21:10 V1057 Cyg 1.5 0.48
21:10–22:40 M31 1.5 0.48
22:40–00:05 M42 1.42 0.52
00:05–00:45 M33 0.67 0.37
00:45–01:15 M42 0.5 0.55
01:15–02:45 M45 1.5 0.46
02:45–02:50 M42 0.08 0.31
02:50–07:50 — nothing worth pointing at — 5.0

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 39 unknown 18:45–00:35 (marginal) 89.8° at 18:10 39.9° 1.5
M42 Great Orion Nebula 49 unknown 19:40–02:50 (marginal) 42.9° at 23:00 45.3° 2.0
M45 Seven Sisters 52 unknown 18:45–02:45 (marginal) 72.5° at 21:15 18.6° 1.5
NGC 7000 North America Nebula 25 unknown 18:45–19:15 (good) 87.2° at 14:25 79.6° 1.5
V1057 Cyg 24 unknown 18:45–19:15 (good) 87.3° at 14:25 79.5° 1.5
M33 Triangulum Pinwheel 34 unknown 18:45–00:45 (marginal) 79.2° at 19:00 25.2° 0.67
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2039-01-04"

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"}.