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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 Saturday, 31 December 2039 · astronomical night 18:40 → 06:07 (11.46 h) · Moon 98% (full moon) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 17:35–17:50: quality 0.2M31 17:50–18:10: quality 0.1M31 18:10–18:45: quality 0.4M31 18:45–19:25: quality 0.8M31 19:25–21:45: quality 0.7M31 21:45–23:10: quality 0.6M31 23:10–00:15: quality 0.5M31 00:15–00:40: quality 0.4M31 00:40–01:05: quality 0.3M31 01:05–01:10: quality 0.2observe M31 21:00–22:25M42M42 19:30–19:40: quality 0.2M42 19:40–20:15: quality 0.3M42 20:15–22:40: quality 0.4M42 22:40–02:15: quality 0.3M42 02:15–03:05: quality 0.2M42 03:05–03:10: quality 0.1observe M42 23:50–00:25M45M45 17:35–18:10: quality 0.1M45 18:10–18:45: quality 0.3M45 18:45–20:40: quality 0.6M45 20:40–23:05: quality 0.5M45 23:05–01:25: quality 0.4M45 01:25–02:40: quality 0.3M45 02:40–03:10: quality 0.2observe M45 00:25–02:25NGC 7000NGC 7000 17:35–18:10: quality 0.1NGC 7000 18:10–18:45: quality 0.4NGC 7000 18:45–19:20: quality 0.8NGC 7000 19:20–20:30: quality 0.7NGC 7000 20:30–20:50: quality 0.6NGC 7000 20:50–21:10: quality 0.5NGC 7000 21:10–21:30: quality 0.4NGC 7000 21:30–21:35: quality 0.3observe NGC 7000 19:35–21:00V1057 CygV1057 Cyg 17:35–18:10: quality 0.1V1057 Cyg 18:10–18:45: quality 0.4V1057 Cyg 18:45–19:20: quality 0.8V1057 Cyg 19:20–20:30: quality 0.7V1057 Cyg 20:30–20:50: quality 0.6V1057 Cyg 20:50–21:10: quality 0.5V1057 Cyg 21:10–21:30: quality 0.4V1057 Cyg 21:30–21:35: quality 0.3observe V1057 Cyg 18:10–19:35M33M33 17:35–17:50: quality 0.2M33 17:50–18:10: quality 0.1M33 18:10–18:45: quality 0.4M33 18:45–18:55: quality 0.8M33 18:55–21:40: quality 0.7M33 21:40–23:05: quality 0.6M33 23:05–00:25: quality 0.5M33 00:25–00:50: quality 0.4M33 00:50–01:15: quality 0.3M33 01:15–01:20: quality 0.2observe M33 22:25–23:50scheduleV1057 CygNGC 7000M31M33M4518:0020:0022:0000:0002:0004:0006:00

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
16:55–18:10 — nothing worth pointing at — 1.25
18:10–19:35 V1057 Cyg 1.42 0.61
19:35–21:00 NGC 7000 1.42 0.66
21:00–22:25 M31 1.42 0.65
22:25–23:50 M33 1.42 0.55
23:50–00:25 M42 0.58 0.31
00:25–02:25 M45 2.0 0.35
02:25–07:50 — nothing worth pointing at — 5.42

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 77 unknown 18:45–22:25 (good) 89.7° at 18:25 86.0° 1.42
M42 Great Orion Nebula 24 unknown 19:55–00:25 (marginal) 42.9° at 23:20 44.8° 0.58
M45 Seven Sisters 61 unknown 18:45–19:45 (good) 72.5° at 21:30 55.5° 2.0
NGC 7000 North America Nebula 42 unknown 18:45–20:40 (good) 87.2° at 14:40 109.4° 1.42
V1057 Cyg 42 unknown 18:45–20:40 (good) 87.3° at 14:40 109.5° 1.42
M33 Triangulum Pinwheel 75 unknown 18:45–22:20 (good) 79.2° at 19:15 81.4° 1.42
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2039-12-31"

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"}.