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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 December 2040 · astronomical night 18:34 → 06:04 (11.51 h) · Moon 89% (waning gibbous) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 17:30–18:05: quality 0.2M31 18:05–18:35: quality 0.5M31 18:35–19:35: quality 1.0M31 19:35–19:40: quality 0.9M31 19:40–22:20: quality 0.8M31 22:20–23:40: quality 0.7M31 23:40–00:45: quality 0.6M31 00:45–01:10: quality 0.5M31 01:10–01:30: quality 0.4M31 01:30–01:45: quality 0.3observe M31 21:15–22:50M42M42 20:10–20:25: quality 0.3M42 20:25–20:55: quality 0.4M42 20:55–00:20: quality 0.5M42 00:20–02:45: quality 0.4M42 02:45–03:20: quality 0.3M42 03:20–03:45: quality 0.2observe M42 02:00–03:05M45M45 17:30–18:05: quality 0.1M45 18:05–18:35: quality 0.4M45 18:35–19:30: quality 0.9M45 19:30–19:35: quality 1.0M45 19:35–22:25: quality 0.7M45 22:25–00:40: quality 0.6M45 00:40–02:30: quality 0.5M45 02:30–03:10: quality 0.4M45 03:10–03:35: quality 0.3M45 03:35–03:45: quality 0.2observe M45 00:25–02:00observe M45 03:05–03:25NGC 7000NGC 7000 17:30–18:05: quality 0.2NGC 7000 18:05–18:35: quality 0.5NGC 7000 18:35–18:50: quality 1.0NGC 7000 18:50–19:35: quality 0.9NGC 7000 19:35–20:25: quality 0.8NGC 7000 20:25–21:15: quality 0.7NGC 7000 21:15–21:35: quality 0.6NGC 7000 21:35–21:55: quality 0.5NGC 7000 21:55–22:15: quality 0.4observe NGC 7000 19:40–21:15V1057 CygV1057 Cyg 17:30–18:05: quality 0.2V1057 Cyg 18:05–18:35: quality 0.5V1057 Cyg 18:35–18:50: quality 1.0V1057 Cyg 18:50–19:35: quality 0.9V1057 Cyg 19:35–20:25: quality 0.8V1057 Cyg 20:25–21:15: quality 0.7V1057 Cyg 21:15–21:35: quality 0.6V1057 Cyg 21:35–21:50: quality 0.5V1057 Cyg 21:50–22:10: quality 0.4V1057 Cyg 22:10–22:15: quality 0.3observe V1057 Cyg 18:05–19:40M33M33 17:30–17:35: quality 0.1M33 17:35–18:05: quality 0.2M33 18:05–18:35: quality 0.5M33 18:35–19:35: quality 1.0M33 19:35–22:30: quality 0.8M33 22:30–23:50: quality 0.7M33 23:50–01:00: quality 0.6M33 01:00–01:20: quality 0.5M33 01:20–01:40: quality 0.4M33 01:40–01:55: quality 0.3observe M33 22:50–00:25scheduleV1057 CygNGC 7000M31M33M45M4218:0020:0022:0000:0002:0004:0006:00

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
16:50–18:05 — nothing worth pointing at — 1.25
18:05–19:40 V1057 Cyg 1.58 0.79
19:40–21:15 NGC 7000 1.58 0.75
21:15–22:50 M31 1.58 0.77
22:50–00:25 M33 1.58 0.66
00:25–02:00 M45 1.58 0.52
02:00–03:05 M42 1.08 0.36
03:05–03:25 M45 0.33 0.33
03:25–07:50 — nothing worth pointing at — 4.42

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 100 unknown 18:35–00:25 (good) 89.5° at 19:05 95.9° 1.58
M42 Great Orion Nebula 41 unknown 20:15–03:05 (marginal) 42.9° at 23:55 55.1° 1.08
M45 Seven Sisters 96 unknown 18:35–23:50 (good) 72.5° at 22:05 68.3° 1.92
NGC 7000 North America Nebula 72 unknown 18:35–21:25 (good) 87.2° at 15:20 112.6° 1.58
V1057 Cyg 72 unknown 18:35–21:25 (good) 87.3° at 15:20 112.7° 1.58
M33 Triangulum Pinwheel 100 unknown 18:35–00:30 (good) 79.2° at 19:55 93.1° 1.58
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2040-12-21"

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"}.