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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, 18 December 2037 · astronomical night 18:32 → 06:03 (11.5 h) · Moon 87% (waxing gibbous) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 17:25–18:00: quality 0.1M31 18:00–18:05: quality 0.3M31 18:05–18:35: quality 0.2M31 18:35–19:25: quality 0.5M31 19:25–01:15: quality 0.4M31 01:15–01:50: quality 0.3M31 01:50–01:55: quality 0.2observe M31 21:20–23:00M42M42 20:20–20:50: quality 0.2M42 20:50–21:35: quality 0.3M42 21:35–00:40: quality 0.4M42 00:40–03:10: quality 0.5M42 03:10–03:35: quality 0.4M42 03:35–03:55: quality 0.3observe M42 23:00–00:40observe M42 03:45–03:50M45M45 17:25–18:00: quality 0.1M45 18:00–18:35: quality 0.2M45 18:35–01:55: quality 0.4M45 01:55–03:05: quality 0.5M45 03:05–03:35: quality 0.4M45 03:35–03:55: quality 0.3observe M45 01:35–03:45NGC 7000NGC 7000 17:25–18:00: quality 0.1NGC 7000 18:00–18:35: quality 0.3NGC 7000 18:35–18:55: quality 0.7NGC 7000 18:55–20:35: quality 0.6NGC 7000 20:35–21:35: quality 0.5NGC 7000 21:35–22:00: quality 0.4NGC 7000 22:00–22:25: quality 0.3observe NGC 7000 18:00–19:40V1057 CygV1057 Cyg 17:25–18:00: quality 0.1V1057 Cyg 18:00–18:35: quality 0.3V1057 Cyg 18:35–18:55: quality 0.7V1057 Cyg 18:55–20:35: quality 0.6V1057 Cyg 20:35–21:35: quality 0.5V1057 Cyg 21:35–22:00: quality 0.4V1057 Cyg 22:00–22:25: quality 0.3observe V1057 Cyg 19:40–21:20M33M33 17:25–18:00: quality 0.1M33 18:00–18:35: quality 0.2M33 18:35–01:20: quality 0.4M33 01:20–01:55: quality 0.3M33 01:55–02:05: quality 0.2observe M33 00:40–01:35scheduleNGC 7000V1057 CygM31M42M33M4518:0020:0022:0000:0002:0004:0006:00

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
16:50–18:00 — nothing worth pointing at — 1.17
18:00–19:40 NGC 7000 1.67 0.53
19:40–21:20 V1057 Cyg 1.67 0.56
21:20–23:00 M31 1.67 0.42
23:00–00:40 M42 1.67 0.42
00:40–01:35 M33 0.92 0.36
01:35–03:45 M45 2.17 0.43
03:45–03:50 M42 0.08 0.31
03:50–07:45 — nothing worth pointing at — 3.92

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 38 unknown 18:35–01:30 (marginal) 89.8° at 19:15 41.3° 1.67
M42 Great Orion Nebula 38 unknown 21:05–03:50 (marginal) 42.9° at 00:05 43.5° 1.75
M45 Seven Sisters 44 unknown 18:35–03:45 (marginal) 72.5° at 22:20 17.5° 2.17
NGC 7000 North America Nebula 38 unknown 18:35–19:40 (good) 87.2° at 15:30 81.1° 1.67
V1057 Cyg 38 unknown 18:35–19:40 (good) 87.3° at 15:30 81.1° 1.67
M33 Triangulum Pinwheel 30 unknown 18:35–01:35 (marginal) 79.2° at 20:05 26.6° 0.92
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2037-12-18"

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"}.